Events/Educational Programs

March 31 – Delaware Naturally: Spring Into Action! A Free Virtual Summit Series. The Built Environment Conservation Roundtable. 9 AM – 10:30 AM To register:

March 31 – Managing Common Garden Invasives, 7:00pm ET.  The first half of the webinar will cover identification and management best practices for some of the most common and most stubborn invasive plants in the Catskills watershed – Japanese knotweed, Japanese barberry, Oriental bittersweet, mugwort, and more. The second half of the talk will cover resources for how you can plan and execute a comprehensive management plan for invasive species on your property, from research and identification to restoration.

March 31 – Wednesday Walks in the Garden;  Free Webinar Series ELA is pleased to announce a second season of free online garden presentations, as people across the country and around the world continue to navigate the challenges of COVID-driven restrictions. We invite you to join us for Wednesday Walks in the Garden being presented on Wednesdays at 12:00pm EST, beginning on March 31st. The series will include twelve webinars covering a wide range of gardening topics to offer plant tips, gardening guidance, humor, and inspiration. Presentations are free but registration is required. Read more and register.

April 1 – 7 – UDBG Online Sale for Patrons. Patron pick up is April digital version of the catalog.

April 1 and April 8 – Navigating Public Design Space – Part 1. 1-3 PM. Community spaces are exciting projects to envision and realize. In this half-day workshop, learn a process to bring stakeholders together to collaborate in creating outdoor spaces of meaning and beauty. Understand how to use your creative ideas to build partnerships, develop fundraisers, overcome obstacles, and draw visitors to your public landscape. Instructor Staci Jasin, Landscape Designer Members $60, Nonmembers $72. Read more and register

April 6 – The Nature of Oaks with Doug Tallamy. 7-8 PM via Zoom. Once we have decided to restore the ecological integrity of our human-dominated landscapes, we need to decide what plants to add to our properties. Oaks are superior landscape trees throughout most of the U.S. because of their many ecological and aesthetic attributes. They’re one of the powerhouse plants that support the majority of Lepidoptera, the order of insects that includes butterflies and moths.  Using activity on the oaks in his yard each month of the year as examples, a conservationist, entomologist and author Doug Tallamy will compare oak species to other popular shade trees in terms of their ability to support animal diversity, protect watersheds, and sequester carbon dioxide. UDBG’s featured herbaceous plant at this year’s sale. UDBG members Free, Nonmembers $15. To learn more, register and pay for classes via our online form CLICK HERE or call (302) 831-2534 or email to register.

April 7 – Wednesday Walks in the Garden, Webinar – Proper Planting Practices: Are We Landscaping in a Deficit Model @ 12:00-1:00pm EDT. Richard McCoy will provide information on current techniques of proper planting, how to correct unseen issues that are borne in the landscape nursery, the importance of the plant root collar, plant placement by matching site conditions to a plant’s cultural needs, and how these efforts add value to a landscape. Read more and register

April 8 – 13 – UDBG Online Sale for Members. Member pick up is April 23, and digital version of the catalog.

April 13 – Spotted Lanternfly Webinar – The EPA Center for IPM is offering a free webinar on the Spotted Lanternfly, to be aired April 13 from 2-3:30 PM Eastern. This invasive pest, while still somewhat limited in distribution to a few States, is a nasty pest and undoubtedly will expand with the help of people. “This topic is a continuation of our IPM for Tree Pests webinar series and will review one of the newest invasive challenges to face trees in the U.S. ─ the spotted lanternfly. Join us to learn about the environmental and the economic devastation currently taking place throughout the mid-Atlantic states. Unfortunately, the lanternfly is on the move, expanding toward the northeast, Appalachia, and north-central states. This webinar will present the latest in prevention and control strategies used by arborists, including pesticides (biopesticides and conventional pesticides), cultural controls, and biological controls. Continuing education credits will be available through some tree/arborist and pest management associations.” [EPA IPM Center] Registration for Lanternfly Webinar:

April 14 – Wednesday Walks in the Garden.  Webinar – Maximizing Space in the Garden: Creating More of a Good Thing @ 12:00-1:00pm EDT No matter if you’re gardening in a close-knit neighborhood or a sprawling estate, you want to garden efficiently, prolifically, sustainably, and beautifully. Tovah Martin will explain that you need to garden smartly and you’ve got to conserve your resources. When you layer a garden, not only do you maximize space, but you can also create hardworking habitats. Read more and register

April 21 – Wednesday Walks in the Garden. Webinar: Creating Community with Our Insect Friends @ 12:00-1:00pm EDT Join Dr. Nancy Lee Adamson to learn about common insects in our communities and how to support them. Nancy will highlight the difference between solitary and social wasps and bees, “beneficial” insects in agriculture, and ways we can support insects in our neighborhoods and broader communities. Read more and register 

April 27 and May 4 – Eco-restorative garden design. 2-4 PM. What does it take to create a conservation and restoration landscape project in your own backyard? In this workshop, we will explore the principles underlying these small-scale projects and outline specific steps to keep you engaged and confident while completing them. You will learn tips, techniques, and a well-defined process for transforming a small plot of land to a native plant landscape. Instructor Staci Jasin, Landscape Designer Members $60, Nonmembers $72. Read more and register.

April 28 – Wednesday Walks in the Garden. Webinar – Going Underground: Unearthing the Role of Soil Organisms in Plant Health @ 12:00-1:00pm EDT. There are an estimated nonillion (1030) microbes on the planet and these organisms play a critical role in plant health. This presentation will take you below ground to explore the microorganisms beneath our feet and the role they play in the nutrient cycles critical to plant growth and ecosystem sustainability. How global change is altering the Earth’s microbiome will also be discussed. Read more and register

April 30 – May 6 – UDBG Online Sale for Public. Public pick up is April 23, and digital version of the catalog.

May 5 – Wednesday Walks in the Garden. Webinar: Beauty and Biodiversity at Cornell’s Mundy Wildflower Garden @ 12:00-1:00pm EDT Please join Krissy Boys for a comprehensive virtual field trip of four discreet sustainable landscapes within the Mundy Wildflower Garden at the Cornell Botanic Gardens. This virtual field trip includes: the specialist bee pollinator garden; the flood plain forest; the deer exclosure; the native lawn; and the stream bank restoration. Read more and register

May 11 – A Beginner’s Approach to Digital Photography with Bob Lyons – 7-8 PM via Zoom. Use your eyes, your mind, and your camera to capture moments in your personal landscapes. They may be your gardens, vignettes from your travels, seasonal records of your favorite plants, and/or features of landscape designs.  Join Dr. Bob Lyons as he provides example-driven, and understandable and uncomplicated information to create aesthetically pleasing images in a relatively short period of time. While equipment details and camera mechanics will be mentioned, they will not dominate the presentation. Instead, the impact and exploitation of prevailing light, elements of photographic composition, the power of mastering depth of field, and developing a personal style will be emphasized. This presentation is particularly relevant for and geared towards early stage photographers who use a variety of devices, including DSLR’s, mobile/cell phones, or both. UDBG Members: $10, Nonmembers: $15. To learn more, register and pay for classes via our online form CLICK HERE or call (302) 831-2534 or email to register.

May 12 – Wednesday Walks in the Garden. Webinar: The Journey of Edible Landscapes @ 12:00-1:00pm EDT. Edible landscaping is the use of food-producing plants in the residential landscape. It can combine fruit and nut trees, berrying shrubs, vegetables, herbs, edible flowers, along with ornamental plants into aesthetically pleasing designs. These designs can adopt any garden style and may include anywhere from 1 to 100 percent edible specimens. Read more and register


June 9 – Invasives Plant Walk. 4-6 PM, James Hall Trail in Newark, Learn to identify and control invasive plants found throughout Delaware. Led by Blake Moore and Sue Barton. To register, contact

August 4 – Hold this date for the Summer Landscape Expo – more details coming.

Other Future IPM Center Webinars:

Past IPM Center Webinars:

Longwood Gardens offers many continuing education classes appropriate for the nursery and landscape industry.  To see their offerings, visit

Mt Cuba Center offers lots of great classes for gardeners and professionals.  To see their offerings visit







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