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2020 7th Annual Tree Diversity Conference

To protect our urban forests, which are threatened by pests and pathogens, a greater variety of tree species is necessary.

 

For our seventh annual conference we will continue to explore the relationships between landscape design, horticultural practices and the use of a greater variety of tree species.

 

Between them, our speakers this year boast an extravagant depth of experience ranging from worldwide plant exploration to landscape and garden design, promotion of new plant materials, administration of some of our country's most noted horticultural conferences and institutions and hands-on experience with plant testing and data collection.

 

Public $80, includes all programming and lunch

$70 Promo, includes all programming and lunch

*Promotional price available to all Members of Colorado Tree Coalition and American Society of Landscape Architects

 

 

Symposium will be held at Denver Botanic Gardens in Mitchell Hall.

 

Speaker Lineup

Steve Foltz presents A Virtual Tour of My Favorite Outstanding Trees of the Cincinnati Region

I'm sure many of you have not yet had the pleasure of touring the best trees in the Cincinnati region. If you were to visit Cincinnati, what would such a tree tour look like? Where would you go? Which arboreta, botanical gardens and nurseries would be on your list to see the best specimen trees in our region? Find out through this lecture. For more than 30 years, Steve Foltz has had the pleasure of searching out the best trees in the landscapes of Cincinnati and will now share them with you.

Foltz is the director of horticulture at the Cincinnati Zoo and Botanical Garden. He has a B.S. in horticulture from the University of Kentucky. Steve also has been teaching woody landscape plant courses at both the University of Cincinnati and the Cincinnati State Horticultural program for the past 25 years.

 

Keith Warren presents New Deciduous Tree Cultivars and Suggestions for Denver

What's new? What's best? And where are we in the development of deciduous tree cultivars? Keith Warren, co-author of “The Tree Book, Superior Selections for Landscapes, Streetscapes and Gardens,” shares the current status of the best choices among the deciduous tree species and cultivars. He discusses the most recent introductions, breeding trends and future directions and offers suggestions for Denver's difficult climate.

Warren spent a 40-year career with Frank Schmidt & Son, Co. as a nursery manager, researcher and director of product development. Recently retired, he is still active with the company and continues to introduce new tree cultivars.

 

Peter Zale presents The Role of Plant Exploration in 200 years of Tree Stewardship at Longwood Gardens

When Longwood become a public garden in the late 1950s, a plant exploration program was developed to fulfill diverse garden needs, one of which was to collect and evaluate an ever-expanding palette of hardy trees and shrubs suitable for the climate of the Brandywine Valley and beyond. Since the inception of the program, a staggering number of woody plants has been trialed and planted in the garden, and these efforts continue today. This presentation tells the story of plant exploration from the 1800s to the present with a focus on recent advancements of the program, anecdotes from the field and a discussion of the wide variety of new, useful and exciting trees and woody plants currently under evaluation and development.

Zale, Ph.D. is a plant collections curator, research horticulturist, field botanist and gardener who specializes in plant collections development, domestic and international plant exploration, ornamental plant breeding and conservation horticulture.

 

Sonia John and Neal Bamesberger present Reprising Some of Colorado's Notable Trees

Since the discontinuation a few years ago of the Colorado Tree Coalition's annual wall calendar, Sonia John and Neal Bamesberger have grown nostalgic for the photos and descriptions of 12 different champion and notable trees it used to feature each year. To compensate, they present photos and stories about their own personal notable tree selections, Sonia's from within Denver and Neal's from the further reaches of the state, some garnered during a recent champion re-measuring foray.

John has been chairwoman of the organizing committee for the annual tree diversity conferences since their inception in 2014. She was the senior author of "Denver's Canopy: The Nature of Deciduous Trees," published by Denver Botanic Gardens.

Bamesberger has a B.S. in horticulture from the University of Nebraska and is a certified arborist.

 

Panayoti Kelaidis and Alan Rollinger present Rollinger Tree Project

Panayoti and Alan discuss the findings of the Rollinger Tree Collection 50-Year Survey. The survey is a project conducted from 2017 to 2019 by Denver Metro city foresters, Master Gardeners, Denver Botanic Gardens staff and other volunteers, who tracked down the trees first located and measured by Alan Rollinger in the late 1960s. After these trees were identified and measured, a document with the results was published in late 2019.

Kelaidis is senior curator and director of outreach at Denver Botanic Gardens where he has worked for 40 years.

Rollinger has been a leading landscape designer in the Denver Metropolitan Area for more than 50 years, designing hundreds of residential and commercial properties.

 

A New Gardener Boot Camp

Are you a blank slate when it comes to starting your very own garden? Worried about ending the growing season with a pile of dead plants and sad vegetables? Join us at Denver Botanic Gardens for a full day event, packed with answers to all those looming and mysterious gardening questions. Get started on the right foot this year with all of our best beginner’s classes, carefully designed to equip you with all the tools you’ll need to master that garden once and for all!

 

Classes include:

 

Garden Planning 101… where do I start?

This beginner’s class will take you step by step through the process of laying out a plan of attack for your garden! Whether you are starting with a blank slate garden or working with an old outdated garden this class will give you the basics on where to start. It will discuss needs and planning tools for raised beds, container gardens and in-ground vegetable gardens. We will discuss the basics of garden locations, sun requirements, water needs, starting from seed, transplanting and the basics of planning the organization of perennials and annuals, trees and shrubs. This class is the perfect fit for anyone needing to understand how the garden works together as a whole.

 

Soils 101

Soils will always be the first place to start when building a beautiful garden. This class will cover the best management practices for building your soil for in-ground beds, containers and raised beds. It will discuss the basics of composting as well as demonstrate the value of soil testing.

 

Beginning Vegetable Gardening

If you have never planted edible plants or had little success at growing your own vegetables, our instructor will walk you through the ABCs from planning, soil preparation, crop selection, watering, fertilizing, pest protection, and harvesting your first vegetable garden. We will cover tips on the most popular vegetables to grow, including leafy salad greens, tomatoes, squash, peppers, and more. You'll leave with a comprehensive understanding of how to successfully do each gardening task, and take home a planting guide that will help you through the entire growing season.

 

Annuals and Perennials for Color in the Garden

Plants provide the backbone of the garden with vibrant colors, textures, and forms that weave together to create your own personal oasis. Learn the basics of perennials, annuals and biennials, how to make the best selections for your garden and how to best maintain your plants throughout the season. From the traditional to the unusual we will explore the limitless varieties of plants and send you into the growing season prepared.

 

These classes combined usually cost more than $200, but with New Gardener Boot Camp, the event will be $60 members, $80 non-members. Register early as space is limited.

 

Lunch included with registration

A New Gardener Boot Camp - Evening Series

Are you a blank slate when it comes to starting your very own garden? Worried about ending the growing season with a pile of dead plants and sad vegetables? Join us at Denver Botanic Gardens for two evenings packed with answers to all those looming and mysterious gardening questions. Get started on the right foot this year with all of our best beginner classes, carefully designed to equip you with all the tools you will need to master that garden once and for all!

 

This series occurs on two evenings, two boot camp classes will be covered each evening.

 

Classes include:

Garden Planning 101 - Where do I Start?

This beginner class will take you step by step through the process of laying out a plan of attack for your garden! Whether you are starting with a blank slate garden or working with an old outdated garden this class will give you the basics on where to start. It will discuss needs and planning tools for raised beds, container gardens and in-ground vegetable gardens. We will discuss the basics of garden locations, sun requirements, water needs, starting from seed, transplanting and the basics of planning the organization of perennials and annuals, trees and shrubs. This class is the perfect fit for anyone needing to understand how the garden works together as a whole.

Soils 101

Soils will always be the first place to start when building a beautiful garden. This class will cover the best management practices for building your soil for in-ground beds, containers and raised beds. It will discuss the basics of composting as well as demonstrate the value of soil testing.

Beginning Vegetable Gardening

If you have never planted edible plants or had little success at growing your own vegetables, our instructor will walk you through the ABCs from planning, soil preparation, crop selection, watering, fertilizing, pest protection, and harvesting your first vegetable garden. We will cover tips on the most popular vegetables to grow, including leafy salad greens, tomatoes, squash, peppers, and more. You'll leave with a comprehensive understanding of how to successfully do each gardening task, and take home a planting guide that will help you through the entire growing season.

Annuals and Perennials for Color in the Garden

Plants provide the backbone of the garden with vibrant colors, textures, and forms that weave together to create your own personal oasis. Learn the basics of perennials, annuals and biennials, how to make the best selections for your garden and how to best maintain your plants throughout the season. From the traditional to the unusual we will explore the limitless varieties of plants and send you into the growing season prepared.

These classes combined usually cost more then $200 but with New Gardener Boot Camp event will be $60 members, $80 non-members. Register Early as space is limited.

A Simple Guide to Planning a Seed Garden

 

Learn how planning ahead can yield big results from your harvest. The seed life cycle is already happening in your garden, so it is easy to integrate seed saving into your personal seed bank and keep plants - including vegetables, herbs and flowers - dynamic and adapting to your garden. This class breaks down the easy-to-save, intermediate-to-save and advanced-to-save varieties most commonly grown in home gardens.

The Parmenters will cover wet and dry seed saving, plant families, seed terms, resources, harvesting, storage, isolation distances, hand pollinating and more.

 

Price: $31, $26 member

Instructors: Penn and Cord Parmenter

 

Penn and Cord Parmenter are high altitude food and seed growers. In 1991, they began homesteading and growing on 43 acres in the Wet Mountains of South-Central Colorado at 8,120 ft. They apply a multitude of techniques to overcome the challenges of the high country. They are owners of Smart Greenhouses LLC, a sustainable greenhouse design company and Miss Penn s Mountain Seeds, providing regionally adapted seeds for extreme climates.

Advanced Bonsai Design - A Performance

Larry Jackel leads a demonstration and discussion of techniques used to develop wild/collected material from the Front Range into bonsai. Three artists from the Rocky Mountain Bonsai Society develop the plant material as Larry describes and discusses their work.

  

Presenting Artists:

Todd Schlafer  - Todd is a past president of the Rocky Mountain Bonsai Society, was named the 2012 Rocky Mountain Bonsai Society Artist of the Year and is the 2016 winner of Best North American Species Award for his Colorado Blue Spruce at the National Bonsai Exhibition in Rochester, New York.

Adam Johnson - Adam first studied Bonsai under artist Hal Sasaki, soon after meeting Larry Jackel to become part of the Rocky Mountain Bonsai Society. He was named the 2019 Rocky Mountain Bonsai Society Artist of the Year.

Paul Koenning - As an arborist, Paul loves studying tree growth patterns and how specific species respond to environmental conditions. Realizing similarities in growth patterns between differing species guides Paul s approach to styling bonsai and pushing their boundaries. Investigating and understanding how trees respond to environmental conditions, is for Paul, where beauty is captured.

Larry Jackel - Larry saw his first bonsai at the Midwest Show in 1972 and has been actively studying bonsai and acquiring trees ever since. A move to Denver in 1976 connected Larry with the Rocky Mountain Bonsai Society, which provided the nurturing necessary for Larry to become proficient in the art and craft of bonsai. Larry chooses trees from the Front Range for bonsai, particularly the ponderosa pine but also the limber pine, bristlecone pine, pinion pine, Douglas fir and the Rocky Mountain juniper. Larry has had the opportunity to teach about these conifers in lectures, demonstrations and workshops across the country. In the spring of 2012, he joined the horticulture staff at Denver Botanic Gardens as its bonsai specialist. He develops and maintains the bonsai collection displayed in the Bill Hosakawa Bonsai Pavilion.

 

All lecture programs: $40 member, $45 non-member. Space is limited so register early!

 

 

 

 

 

 

Amazing Vegetables A to Z: Extended Gardening

Rocky Mountain Gardening Elective

This is the class that will hone your skills as an amazing vegetable gardener. It is designed to take beginners to a new level and remind intermediate gardeners of the success strategies that always work when we go off course and forget the science of what got us to success in the first place. We will cover the science of vegetable gardening, do some myth busting, and provide you with some clear cut strategies to get the biggest harvest from the space you have.

The classes are 2 ½ hours each and are designed so that you can take the entire series or drop in for a refresher on the single class or classes that you want to brush up on. We will use a combination of hands on and lecture and demonstration to keep you engaged.

Please note: We will not cover gardening in containers in depth in this class. If that is your interest, please see Crops in Pots.

 

Session 3: Extended Gardening

Keeping the Garden going for 3 seasons and beyond is the theme of this session. We will cover the importance of Crop Rotation and how to do it. We will learn different ways to succession plant and how it can maximize the harvest. We will address season extension strategies to protect your crops. We will also cover the concept of companion planting and what is true and what is not.

 

Instructor: Patti O'Neal

Price: $35, $30 members

Special Instructions: You can sign up for each individual session, or sign up for all four classes in the series at a discount by signing up for "Amazing Vegetables A to Z Full Series".

 

Amazing Vegetables A to Z: Pests, Problems & Harvesting

Rocky Mountain Gardening Elective

This is the class that will hone your skills as an amazing vegetable gardener. It is designed to take beginners to a new level and remind intermediate gardeners of the success strategies that always work when we go off course and forget the science of what got us to success in the first place. We will cover the science of vegetable gardening, do some myth busting, and provide you with some clear cut strategies to get the biggest harvest from the space you have.

The classes are 2 ½ hours each and are designed so that you can take the entire series or drop in for a refresher on the single class or classes that you want to brush up on. We will use a combination of hands on and lecture and demonstration to keep you engaged.

Please note: We will not cover gardening in containers in depth in this class. If that is your interest, please see Crops in Pots.

 

Session 4: Pests, Problems, & Harvesting

The most common pests and diseases of the vegetable garden will be addressed, how to spot problems before they get away from you and good cultural practices to avoid problems, organics, watering, fertilizing and insect and disease controls. We will also discuss how to know when your veggies are ready for harvest.

 

Instructor: Patti O'Neal

Price: $35, $30 members

Special Instructions: You can sign up for each individual session, or sign up for all four classes in the series at a discount by signing up for "Amazing Vegetables A to Z Full Series".

 

Amazing Vegetables A to Z: Planting

Rocky Mountain Gardening Elective

This is the class that will hone your skills as an amazing vegetable gardener. It is designed to take beginners to a new level and remind intermediate gardeners of the success strategies that always work when we go off course and forget the science of what got us to success in the first place. We will cover the science of vegetable gardening, do some myth busting, and provide you with some clear cut strategies to get the biggest harvest from the space you have.

The classes are 2 ½ hours each and are designed so that you can take the entire series or drop in for a refresher on the single class or classes that you want to brush up on. We will use a combination of hands on and lecture and demonstration to keep you engaged.

Please note: We will not cover gardening in containers in depth in this class. If that is your interest, please see Crops in Pots.

 

Session 2: Planting

Planting is the focus of this session. How to decide what to plan, the seasons of the vegetable garden and getting the biggest bang for your gardening buck. We will cover cool season and warm season plants and the ones that grow best here in Colorado. Then take a look at seed starting and see a demonstration of starting seeds inside and direct sowing outside as well as transplanting. Then we will cover spacing strategies designed to give you the biggest harvest for the space you have available.

 

Instructor: Patti O'Neal

Price: $35, $30 members

Special Instructions: You can sign up for each individual session, or sign up for all four classes in the series at a discount by signing up for "Amazing Vegetables A to Z Full Series".

 

Amazing Vegetables A to Z: The Garden Build

Rocky Mountain Gardening Elective

This is the class that will hone your skills as an amazing vegetable gardener. It is designed to take beginners to a new level and remind intermediate gardeners of the success strategies that always work when we go off course and forget the science of what got us to success in the first place. We will cover the science of vegetable gardening, do some myth busting, and provide you with some clear cut strategies to get the biggest harvest from the space you have.

The classes are 2 ½ hours each and are designed so that you can take the entire series or drop in for a refresher on the single class or classes that you want to brush up on. We will use a combination of hands on and lecture and demonstration to keep you engaged.

Please note: We will not cover gardening in containers in depth in this class. If that is your interest, please see Crops in Pots.

 

 

Session 1: Raised Beds

Planning the best location, choosing in ground or raised beds and the advantages and disadvantages of each. We will look at re-purposing materials to create raised beds. We will cover soil building and choosing amendments. We will build around what has not worked for you in the past and set you on a course for improvement for your 2017 vegetable garden. Every season is a Do-Over!

 

Instructor: Patti O'Neal

Price: $35, $30 members

Special Instructions: You can sign up for each individual session, or sign up for all four classes in the series at a discount by signing up for "Amazing Vegetables A to Z Full Series".

 

Battling the Japanese Beetle

Rocky Mountain Gardening Elective

The Japanese beetle – found in many Front Range areas - is moving to new communities. This unwelcome beetle is concerning home owners with serious damage to plants. Instructor Betty Cahill takes the class through the management options for the Japanese beetle during its adult and larval stages. She provides tips on how to protect your favorite plants, including a plant list that Japanese beetles prefer and mostly avoid.

Instructor: Betty Cahill

Price: $31, $26 member

Beginning Bonsai

Are you mystified by the many centuries old Japanese tradition of bonsai? Join us for an entertaining and informative class with nationally recognized bonsai masters Harold Sasaki and Larry Jackel as they debunk the myths, fictions and misconceptions surrounding this living art form. Each participant receives a tree, pot, wire, soil and gravel in this hands-on experience of creating a finished bonsai, which you can home.

 

** this class sells out very quickly, class size is very small for hands on instruction and attention from instructors, please register early

 

Instructors: Harold Sasaki and Larry Jackel

Price: $105, $95 member, $30 materials fee included

Special Instructions: There will be a break for lunch, please bring lunch or there is a cafe onsite for you to purchase lunch.

 

*instructor change possible due to availability

Best Long Blooming Perennials

Rocky Mountain Gardening Elective

When gardeners dive into the fascinating world of perennials, they are often disappointed to find that, unlike annuals, most perennials only bloom for a few weeks. However some perennials push the envelope. Learn about the long-blooming stars that flower tirelessly for over a month, often much more. Get to know peak performers for spring, summer, and autumn, and for various amounts of sunlight and moisture.

 

Instructor: Lauren Springer is a long-time instructor at DBG and internationally known garden designer, author, and speaker. She designed several gardens at DBG, including the popular WaterSmart Garden, and most recently the new native Visitors Center gardens at Chatfield Farms.

Price: $34, $29 members

Best Roses For Your Garden, New and Overlooked!

Just about everyone grows a rose bush or two. Congress designated the rose as America³ national floral emblem in 1986. The popularity of growing roses began thousands of years ago and continues today. The rose growing series offered by American Rose Society Consulting Rosarians and experts from the Denver Rose Society will cover how to grow healthy, easy care beautiful roses for years to come. The series covers secrets to successful rose growing, no pain pruning, versatile shrub roses, fragrant roses, and winter care. Choose one class or take them all and come away with confident rose growing skills and greater appreciation for the "Queen of Flowers."

 

Which rose varieties should you grow in your garden? Canadian hardies? Species? Let one of our experienced rosarians with the Denver Rose Society guide you through the palette of choices. You’ll learn the difference between a species and a hybrid tea, and when to pick one over the other. Which climbers do well here, and why? We’ll focus on varieties that thrive along the front range and in the foothills, tempt you with the newest introductions, and share key advice on plant selection and best planting techniques.

 

Price: $31, $26 members

Instructor: David Ingram

 

Contain Those Perennials; But Not Yourself!

Rethink those container gardens! Yes, perennials can be used successfully in containers and provide long lasting color. Learn how to utilize them and which varieties are best suited for container gardening.

 

Price: $18, $16 member

Instructor: Debi Borden-Miller

 

Debi Borden-Miller is a University of Vermont graduate with a bachelor’s in plant and soil science.

Since moving to Colorado, she has worked at Fruehauf’s Garden Center, Wilmore Nursery, Little Valley Wholesale Nursery and Welby Gardens Company where she spent a total of 28 years in sales and marketing.

Debi is a board member of the Colorado Garden & Home Show and represents the Colorado Nursery and Greenhouse Association on the management team of ProGreen Expo. She also serves on several CO Nursery and Greenhouse Association committees and is a long-time board member and former president of the Colorado Greenhouse Growers Association and GreenCo.

Converting Lawn to Xeriscape

Rocky Mountain Gardening Elective

Do you want to beautify your landscape and save water at the same time?

Prepare to go into detail about how to replace some of your Kentucky bluegrass lawn with water-smart perennial and ornamental grasses, discuss soil types and irrigation adjustment requirements, and dream up some design ideas in this exciting class.

 

Price: $29, $24 member

Instructor: Curtis Manning

 

 

Photo: Winger Photography

Creating a Hobby Greenhouse

Come learn how to take your master outdoor gardening skills to the next level and extend your growing season and increase your green thumb skills. Is the next step in your horticulture experience maintaining a greenhouse? Before building or buying a greenhouse, learn the benefits and the liabilities of owning a greenhouse.

This program covers common questions and ideas surrounding the addition of a season extension structure, such as a greenhouse, to your property. During this session, the location, costs, logistics and practicality of each structure and device will be covered. The course is designed to allow the participant to explore their options with the use of a greenhouse or other season extending structures.

 

Price: $31, $26 members

 

Special Instructions: Please bring paper and pen to write down notes. No experience with greenhouses is needed.

 

Instructor: Thaddeus Gourd attended New Mexico State University where he graduated with a B.S. degree in Pest Management and Horticulture. He earned a Master’s Degree with thesis study in Entomology at New Mexico State University and a Ph.D. in Plant Pathology with emphasis on plant parasitic nematodes at North Carolina State University. Thaddeus has worked over 19 years in the private sector of the plant science business and since 2000, has worked at Colorado State University Extension as an Agriculture Agent and Director for Adams County. He has extensive experience of horticulture, gardening, weed science, entomology, plant pathology and greenhouse management and has been involved in the practice of Integrated Pest Management for over 30 years.

Crops in Pots

 

This class is great for apartment, condo and patio home dwellers who are short on outdoor space. Learn about the bounty of vegetable and herb container garden options. It is possible to grow vegetables without a plot of soil.

Learn about good container culture, soil, light, water, organic fertilizers, pesticides, frost protection, along with the best sized containers and how to create vertical support. You can even learn how to create mixed containers of vegetables, flowers and herbs.

 

Price: $37, $32 members

Instructor: Patti O'Neal

 

Photo: suzettesuzette (Flickr)

 

CSA Farm Tour and Discussion - Chatfield Farms

Tour the vegetable production areas at Chatfield Farms and taste some fresh flavors. Learn about small-scale farming in the Colorado region, food production and other farm related topics.

Finish the morning with a tasting from of the farm - fresh tomatoes, cheese and herbs - to discuss the flavors of fresh foods.

 

Price: $28, $24 member

Instructor: Josie Hart

Denver Orchid Society Show & Sale

Celebrate the orchid at the Denver Orchid Society's annual show and sale. Beautiful and exotic orchids will be available for purchase. Our experts will answer questions and the American Orchid Society will be judging entries in the show. Come celebrate with us! March 14: 10 a.m. - 5 p.m.; March 15: 10 a.m. - 4 p.m. Included with admission.

 

Denver Rose Society Show

Join us for this fun and educational Expo. Roses accepted from 6:30-10 a.m. Bring blooming roses from your garden to display without the formality of a judged rose show. Vases provided. Enjoy speakers and information panels from 1-3 p.m. Ask our experts about your roses, new roses for your garden and rose culture. Included with admission.

  

 

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