Horticulture & Gardening
Upcoming Classes
The Nuts and Bolts of Plant Propagation
January 13, 2020
Find out what you need to start seeds indoors, as well as how to collect and store your seeds.
Set It and Forget It: Irrigation for Homeowners
January 25, 2020
Learn tips and tricks to water not only your garden beds but also your containers.
Creating a Blooming Winter Landscape
Starts February 4, 2020
Enrich your garden with witch hazels, snowdrops, winter aconite, adonis, and many more.
The Gardener and the Chef: Honey
February 22, 2020
Warm up this winter with a taste of one of civilization's original sweeteners.
Vegetable Gardening Boot Camp
February 29, 2020
Learn to design and create a vegetable garden, including location, layout, and bed preparation.
Performance Pruning: Shrubs
March 7, 2020 (AM)
Improve the performance of your shrubs and vines and take the mystery out of pruning.
Performance Pruning: Shrubs
March 7, 2020 (PM)
Improve the performance of your shrubs and vines and take the mystery out of pruning.
Bonsai Basics
March 14-15, 2020
Learn the care and culture for designing and maintaining these sculptured treasures.
Performance Pruning: Small Flowering Trees
March 21, 2020 (AM)
Improve your trees’ performance and take the mystery out of pruning.
Performance Pruning: Small Flowering Trees
March 21, 2020 (PM)
Improve your trees’ performance and take the mystery out of pruning.
Branches All Around
March 29, 2020
Find a new use for those willow and dogwood branches that you cut back or used for winter decorations.
Amazing Aroids
April 9, 2020
The aroid family has an abundance of weird and wonderful plants worth growing.
Water’s Edge Living Aquarium
April 11, 2020 (AM)
Learn the art of creating a desktop landscape of plants that thrive at and below the water’s edge.
Water’s Edge Living Aquarium
April 11, 2020 (PM)
Learn the art of creating a desktop landscape of plants that thrive at and below the water’s edge.
Trough Making
May 2, 2020 (AM)
Textured stone troughs show off sedums and other garden jewels like no other container.
Trough Making
May 2, 2020 (PM)
Textured stone troughs show off sedums and other garden jewels like no other container.
Functional Landscapes: From Global Trends to the Local View
May 5, 2020
Explore ideas from across the globe about the power of plants.
Weed Identification in Turf
May 6, 2020
Vital identification and management strategies for weeds common to landscape and turf sites.
Insect & Disease Management for Turf
May 6, 2020
Learn signs, symptoms, and management strategies to remedy common turfgrass problems.
Plant Disease Identification
May 12, 2020
Learn the symptoms of plant disease, the conditions that cause them, and how to apply controls as necessary.
Pest Identification
May 12, 2020
Explore our outdoor landscape and identify common pest signs and symptoms with an IPM specialist.
Inside the Hive
May 16, 2020
Curious about what goes on inside a beehive? Get answers and insight into the fascinating world of bees.
The Enigma of New Zealand’s Plant Life
May 16, 2020
Take a journey through the landscapes of New Zealand and learn about the plants and adaptations of its flora.
Water Gardening in a Container
May 16, 2020
Divide and repot plants from Longwood's collection to take home for your water garden.
Unusual Annuals, Biennials, and Half-Hardy Plants
May 31, 2020 (AM)
Learn to integrate these underappreciated plants in permanent plantings.
Hardy Succulents for the Mid-Atlantic Landscape
May 31, 2020 (AM)
Learn tips and tricks for getting these xeric plants to survive our winters and thrive in our summers.
Hardy Succulents for the Mid-Atlantic Landscape
May 31, 2020 (PM)
Learn tips and tricks for getting these xeric plants to survive our winters and thrive in our summers.
Unusual Annuals, Biennials, and Half-Hardy Plants
May 31, 2020 (PM)
Learn to integrate these underappreciated plants in permanent plantings.
The Gardener and the Chef: Summer Fruits
June 10, 2020
Learn the culture and care of summer fruits as we explore the Idea Garden’s vegetable and fruit collection.
Not Hardy, Not a Problem: Tropical Container Gardening
June 14, 2020 (AM)
Combine a variety of “hot” plants into a beautiful focal point to take home.
Not Hardy, Not a Problem: Tropical Container Gardening
June 14, 2020 (PM)
Combine a variety of “hot” plants into a beautiful focal point to take home.
Diversify your Harvest: Exceptional Herbs and Unconventional Veggies
June 27, 2020
Explore edible plants that can add interest to your garden and plate.
Vegetable Gardening Beyond Boot Camp
June 27, 2020
Go beyond the basics of vegetable gardening and make this your best harvest ever.
The Gardener and the Chef: Sweet and Savory Herbs
August 9, 2020
Try new dishes that exemplify the versatility of these plants.
Rain Gardens and the Plants that Love Them
August 20, 2020
Discover plants that can adapt to long periods of dry weather and heavy rainfall.
Pest Identification
September 9, 2020
Learn to recognize pest damage and differentiate between harmful and beneficial insects.
Plant Disease Identification
September 9, 2020
Learn the symptoms of plant disease, the conditions that cause them, and how to apply controls as necessary.
The Ah Factor: Nature as Therapy
September 12, 2020
Transform a personal space to tap into the benefits that horticulture can provide.
Attracting Beneficial Bugs: Insect Mansions
September 13, 2020
Use natural materials to create a mansion of crevices to keep beneficial bugs in your yard.
Weed Identification in Turf
September 16, 2020
Vital identification and management strategies for weeds common to landscape and turf sites.
Insect & Disease Management for Turf
September 16, 2020
Hone your ability to diagnose symptoms of turf grass disease, insect infestation, or cultural damage.
Composting: Start Your Microbes
September 19, 2020
Start a backyard compost system that produces “black gold” for your garden beds.
Composting: Beyond the Basics
September 26, 2020
Explore composting with difficult materials and on a larger scale.
