Plant of the Week: Kohlrabi

Plan your garden with  Seed St. Louis 2025 Planting Calendar.
-> Start Indoors This Week: Basil, Peppers
-> Transplant This Week: Bok Choy, Broccoli, Cabbage, Chard, Collards, Kale, Kohlrabi, Lettuce, Onions, Leeks
-> Sow Outdoors This Week: Bok Choy, Chard, Collards, Kale, Kohlrabi, Lettuce, Peas

When to Plant in Illinois (University of Illinois Extension)

USDA Plant Hardiness Zone Map

If you are just looking for St. Louis Area Plant and Seed Swaps and Sales, they are here. Added this week: Webster Groves Women’s Garden Association Plant Sale

Find a Native Plant/Seed vendor in Missouri, Illinois, Arkansas, Kansas,… (Grow Native)

St. Louis Master Gardeners Horticulture Answer Service: Monday through Thursday from 9 am. to 2:30 pm

March 17th Registration Opens for Missouri Invasive Plant Council’s Callery (Bradford) Pear Buyback Program in 17 cities

April 15th Deadine to Nominate for Missouri Invasive Plant Council’s Invasive Plant Action Award

April 25th Deadline to Register community cleaning or greening Blitz Projects with Brightside St. Louis and get free Blitz Blooms annuals to plant in public spaces.

Illinois School Teachers- March 2025 Application process begins for 2026 Illinois Schoolyard Habitat Action Grant Program

Good Reads/Views/Listens —

Gardening By Month: March Tips, Tasks, & Problems (Missouri Botanical Garden)

February Native Plant News (Wild Ones)

As bird flu spreads, feds might undercut states by firing scientists, removing data. The avian influenza virus has killed millions of wild birds and led to emergency culling of commercial flocks. (Stateline)

St. Louis County’s new tick is a ‘serious threat,’ officials say. The sesame seed-sized arachnid causes serious problems in domestic animals and livestock, officials said. (KSDK TV)

Shaw Nature Reserve Propagation Guide

Seed St. Louis Videos: Variety Trials, Virtual Classes, Starting Seeds Indoors, Orchard Tips, Gardening Tips & How To, In the Community Garden, Youth Garden Activities & Tips, Teachers in the Garden Tutorials. I will continue promoting the online resources and activities of Seed St. Louis where appropriate. I will not, however, knowingly promote events at Maxine Clark’s school privatization campus named Delmar Divine. It is unfortunate that Seed St. Louis is now a tenant there.

Free Native Garden Designs @ Wild Ones. There’s one specific to St. Louis, one for Chicago, one for Denver, …

Native plant gardening in a pot. Missouri Botanical Garden has container designs for sun and shade.

Illinois Native Plants for the Home Landscape

Missouri Native Plant Top 10 Lists (Grow Native) Native Plants for Children, Poorly Drained Clay Soil, Sun, Shade, Half Sun & Half Shade, Under Utility Poles, Rain Gardens, Kitchen Gardens, Bees, Pollinators in Winter, Hummingbirds, Wildlife, Butterflies, More

2023 Plants of Merit – Annuals, Bulbs, Edibles, Perennials, Shrubs, Trees, Vines (Missouri Botanical Garden)

2023 Plants of Demerit – Bamboo, Big Leaf Hydrangea, Blueberry, Burning Bush, Chameleon Plant, Lavender, Pin Oak, Wintercreeper (Missouri Botanical Garden)

Gardening and Nature Events —

6-8 pm Tuesdays, March 11 to April 15, Heartlands Conservancy free six-week course in Belleville, Illinois: Tree Stewards Training. Classes in Tree Biology & Benefits, Tree Identification, Insects & Diseases, Pruning & Maintenance, Forest Ecology, Urban Tree Community Advocacy. Register

6:30 pm Monday, March 3rd, Missouri River Bird Observatory webinar: Effects of Oil Spills on Birds presented by Ben West, USGS Columbia Environmental Research Center. Register

1:30 pm Tuesday, March 4th, University of Illinois Extension webinar: Root Awakening- Spring Tree Tips. Register

8 am to 4 pm Wednesday, March 5th, University of Illinois Extension’s Gateway Green Conference at Collinsville, Illinois: Building Sustainable Landscapes, Conservation Stewardship, Tree Care. $85

9 am Wednesday, March 5th, Bellefontaine Cemetery & Arboretum event: Spring Bulb Walk with horticulturist. $5. Register

10 am Wednesday, March 5th, Bellefontaine Cemetery & Arboretum event: History & Horticulture Trolley Tour with Master Guide. $5. Register

12:30 pm Wednesday, March 5th, Missouri Conservation Department Virtual Class: Rain Gardens and Native Plants. Register

2 pm Wednesday, March 5th, St. Louis County Library Virtual Workshop: Native Garden Design Panel Discussion. Register

Friday-Saturday, March 7th-8th, Midwestern Herb & Garden Show in Mount Vernon, Illinois. Plant & Merch Sales, Speakers/Workshops. 1 1/2 hour from St. Louis.

3:30 pm Friday, March 7th, Missouri Conservation Department virtual class: Native Plants, Wild for Seeds. Register

Get in line early, bring a box lid for your plants. 9 am Saturday, March 8th, Seed St. Louis March Plant Sale at Carriage House, 3815 Bell: Asparagus crowns, Mushroom spawn, Onion sets, seed Potatoes, Strawberry bare roots, Water Chestnuts. See link for planting instructions.

Volunteers Wanted. 9 am Saturday, March 8th, Great Rivers Greenway North Riverfront Park Mulching Day. Register

Noon to 2 pm Saturday, March 8th, Piasa Palisades Sierra Club Seed Swap at Hayner Public Library, Alton, Illinois. Bring your quality seeds, seedlings, cuttings, and bulbs to swap with fellow farmers and gardeners. Nothing to swap, not a problem.

8 Seats remaining. 11 am Saturday, March 8th, St. Charles City-County Library Plant & Seed Swap at Spencer Road Branch. Register

14 Tickets remaining. 6 pm March 8th Missouri Conservation Department event at Powder Valley Conservation Nature Center, Kirkwood: Owl Prowl. Register

6:30 pm March 10th Missouri River Bird Observatory webinar: Plastics and Public Health: the unsettling latest in medical research presented by Megan Wolff, Beyond Plastics. Register

1- 4 pm March 11th Bellefontaine Cemetery & Arboretum horticulture class: Formal and Natural Garden Design Class. Register

4 pm March 11th Missouri Conservation Department online class: Early Butterflies. Register

9 am March 12th Bellefontaine Cemetery & Arboretum event: Spring Bulb Walk with horticulturist. $5. Register

4 pm March 12th Missouri Prairie Foundation webinar: Grassland Grouse- Beauty, Biology, & Conservation. Join acclaimed nature photographer Noppadol Paothong for an unforgettable journey through 25 years of photographing grassland grouse. Register

5-7 pm March 12th Seed St. Louis Young Friends Happy Hour at 2nd Shift Brewing, The Hill

6 pm March 12th St. Louis Public Library event at Carpenter Library:  Welcoming Native Species into Your Garden. Registration opens 10 am February 12th.

5 pm March 12th Seed St. Louis Young Friends Spring Happy Hour at 2nd Shift Brewing, The Hill

Noon March 13th Missouri Conservation Department virtual class: Organic Gardening. Register

6 pm March 13th Seed St. Louis, Table to Garden, Willoughby Farm and Good Dirt Composting Collectiveclass at Collinsville, Illinois:  Food Too Good To Waste Series- Composting 101. $15. Register

7 pm March 14th Heartlands Conservancy Full Moon Hike at Bohm Woods State Nature Preserve in Edwardsville, Illinois. Register

10 am to 2 pm March 15th Rustic Roots Sanctuary 5th Annual Seed Swap in Spanish Lake. Register

2 pm March 15th St. Louis Public Library event at Divoll Library: Seed Swap

1 pm March 16th Willoughby Farm event in Collinsville, Illinois: Sustainability Series- Urban Gardening. $15. Register

6:30 pm March 17th Missouri River Bird Observatory webinar: Missouri Water Policy- history and current legislation presented by Mary Culler, Missouri Stream Teams United. Register

10 am March 19th Bellefontaine Cemetery & Arboretum event: History & Horticulture Trolley Tour. $5. Register

2 pm March 19th Partners for Native Landscaping and St. Louis County Library Zoom Class: Monarchs and Mosquitoes – Control the Pests, Protect the Pollinators. Register

March 22nd Bellefontaine Cemetery & Arboretum Fox Trot 5K and Kit Crawl 10K Run/Walk Fundraiser. Register

9 am to Noon March 22nd Webster Groves Herb Society Display at Missouri Botanical Garden. Garden Admission Free to St. Louis City and St. Louis County residents on Saturday and Wednesday mornings.

1 pm March 22nd St. Louis Public Library event at Central Library: Critical for Gardening- Get the Dirt on Soil, Missouri Botanical Gardens Master Gardener Speakers Bureau

6:30 pm March 24th Missouri River Bird Observatory webinar: The Migratory Bird Treaty Act- history, applications, and current status presented by Sarah Kendrick, US Fish & Wildlife Service. Register

Volunteers Wanted. 9 am March 29th Forest ReLeaf event at CommuniTree Gardens Nursery, Maryland Heights: March Open Nursery Potting Day. Help pot up 20,000 bare root tree seedlings. Register

7 pm March 29th Heartlands Conservancy event at Poag Sand Prairie, Edwardsville, Illinois: Frog Walk. Register

1 pm March 30th Willoughby Farm event in Collinsville, Illinois: Sustainability Series- Knowing & Growing the Native Garden. $15. Register

1-4:30 pm March 30th Wild & Scenic Film Festival at The Blue Note, Columbia MO

2 pm April 2nd Partners for Native Landscaping and St. Louis County Library Zoom Class: Transforming Vacant Lots into Neighborhood Greenspaces. Register

6 pm April 3rd Willoughby Farm event in Collinsville, Illinois: Composting Series- Indoor Compostin- Vermicomposting and Bokashi. $15. Register

8 am to 4 pm April 5th Missouri Wildflowers Nursery returns to Kirkwood Farmers Market. Order online for pick up at Market or purchase from what they bring that day.

9 am April 5th Seed St. Louis Spring Seedling Sale at Carriage House, 3815 Bell

Volunteers Wanted. 9 am April 5th Forest ReLeaf event at Old St. Marcus Cemetery: Christy Greenway Tree Planting. Register

1 pm April 6th Willoughby Farm event in Collinsville, Illinois: Composting Series- Container Gardening. $15. Register

April 6th & 7th Baker Creek Tulip Festival in Mansfield, Wright County, MO, about a 3 1/2 hour drive from St. Louis or Kansas City

Volunteers Wanted. 9 am April 10th Heartland Conservancy event at Edwardsville, Illinois: Poag Sand Prairie Restoration Stewardship Day. Register

6 pm April 10th St. Louis County Library Plant Swap at Thornhill Branch

7 am to 5 pm April 12th Veterans Free Fishing Day at Bennett Spring State Park near Lebanon MO

8 am to 4 pm April 12th Missouri Wildflowers Nursery selling at Kirkwood Farmers Market. Order online for pick up at Market or purchase from what they bring that day.

9 am April 12th Missouri Conservation Department Virtual class: Learning to Hunt- Wild Edibles presented by Bo Brown. Register

Volunteers Wanted. 9 am April 12th Forest ReLeaf event at CommuniTree Gardens Nursery, Maryland Heights: March Open Nursery Potting Day. Help pot up 20,000 bare root tree seedlings. Register

10 am April 12th Grow Native! Native Plant Sale at World Bird Sanctuary, Valley Park Mo. $12 entry fee

11 am April 12th St. Louis Public Library class at Central Library: For the Birds. Learn about planting beautiful, bird-friendly plants, and providing supplemental food, water, and shelter.

1 pm April 12th St. Louis Public Library class at Central Library: Pest Control with Herbs. Register

10 am to 2 pm April 13th Riverlands Native Plant Festival at West Alton, Missouri: Speakers, workshops, native plant giveaway for attendees volunteering for sand prairie planting at event

6 pm April 17th St. Louis County Public Library Spring Gardening Swap at Prairie Commons Branch, Hazelwood. Bring plants, seeds, bulbs, gardening tools, gardening books to swap

8 am to 4 pm April 19th Missouri Wildflowers Nursery selling at Kirkwood Farmers Market. Order online for pick up at Market or purchase from what they bring that day.

9 am to Noon April 22nd Webster Groves Herb Society Display at Missouri Botanical Garden. Garden Admission Free to St. Louis City and St. Louis County residents on Saturday and Wednesday morning, otherwise Admission Fee applies.

11 am April 12th St. Charles City-County Library Plant & Seed Swap at Spencer Road Branch. Register, registration opens March 15th

2 pm April 16th Partners for Native Landscaping and St. Louis County Library Zoom Class: Pollinator Powerhouses and Keystone Plant Species. Register

6 pm April 24th Missouri Conservation Department Virtual class: Learning to Hunt- Mushrooms. Register

6 pm April 24th Seed St. Louis, Table to Garden, Willoughby Farm and Good Dirt Composting Collective class at Collinsville, Illinois:  Food Too Good to Waste Series- Outdoor Composting: Bins and Tumblers. $15. Register

9 am to 4 pm April 25th St. Louis Herb Society Herb Sale at Missouri Botanical Garden parking lot.

8 am to 4 pm April 26th Missouri Wildflowers Nursery selling at Kirkwood Farmers Market. Order online for pick up at Market or purchase from what they bring that day.

April 26th-27th Project Pollinator Native Plant Sale at Sachs Butterfly House, Chesterfield  

Noon to 3 pm April 26th Heartlands Conservancy Native Plant Sale & Order Pick Up at Clinton Hills Conservation Park Pavilion, Swansea, Illinois. Online Pre-Ordering March 20th to April 9th.

10 am to 4 pm April 26th Missouri River Bird Observatory Birds, Bees & Blooms Festival at Arrow Rock, Missouri. This is a 2 1/2 hour drive from St. Louis and a 1 1/2 hour drive from Kansas City.

2 pm April 30th Partners for Native Landscaping and St. Louis County Library Zoom Class: Oh, Deer – Dealing with Unwanted Guests in Your Landscape. Register

6 pm May 1st St. Louis Public Library event at Schlafly Library: Plant Predators- An Introduction to Carnivorous Plants with Carnivorous Plant Society. Register

19 Seats remaining. 10 am May 3rd St. Louis Public Library event at Central Library: Tomatoes 101. Register

1 pm May 3rd St. Louis Public Library event at Buder Library: Meet the Pack: Animals of the Endangered Wolf Center

1 pm May 3rd St. Louis Public Library class at Central Library: Growing Herbs in Containers.

May 4th-5th Baker Creek Spring Planting Festival in Mansfield, Wright County, MO, about a 3 1/2 hour drive from St. Louis or Kansas City

May 8th-9th Jeanette Goldfarb Plant Growth Facility Spring Plant Sale at Washington University

3 pm May 8th St. Louis Public Library event at Baden Library: Mocktails and Garden Party. enjoy refreshing mocktails while crafting your own potted plant to take home.

9 am May 10th Seed St. Louis Summer Seedling & Sweet Potato Slip Sale at Carriage House, 3815 Bell

May 10th Flora Conservancy Plant Sale @ Greenhouse, Forest Park – no link yet

9 am to Noon May 10th Webster Groves Herb Society Display at Missouri Botanical Garden. Garden Admission Free to St. Louis City and St. Louis County residents on Saturday and Wednesday morning, otherwise Admission Fee applies.

9 am to 5 pm May 10th St. Louis Hosta Society Show & Sale at Missouri Botanical Garden. Garden Admission Free to St. Louis City and St. Louis County residents on Saturday and Wednesday mornings, otherwise Admission Fee applies.

11 am May 10th St. Charles City-County Library Plant & Seed Swap at Spencer Road Branch. Register, registration opens April 12th

9 am to 5 pm May 11th Greater St. Louis Iris Society Show at Missouri Botanical Garden. Included with Garden Admission Fee.

5 pm May 15th St. Louis Public Library event at Walnut Park Library: Wild Hearts- Understanding Animal Behavior in the Wild with St. Louis Zoo

9 am to 5 pm May 17th Metropolitan St. Louis African Violet Council Show and Sale at Missouri Botanical Garden. Garden Admission Free to St. Louis City and St. Louis County residents on Saturday and Wednesday mornings, otherwise Admission Fee applies.

2 pm May 21st Partners for Native Landscaping and St. Louis County Library Zoom Class: Cultivating Native Seeds in the Landscape. Register

8 am to 4 pm May 24th Missouri Wildflowers Nursery selling at Kirkwood Farmers Market. Order online for pick up at Market or purchase from what they bring that day.

9 am to 5 pm May 24th-25th Rose Society of Greater St. Louis Show at Missouri Botanical Garden. Garden Admission Free to St. Louis City and St. Louis County residents on Saturday and Wednesday mornings, otherwise Admission Fee applies.

May 31st Urban Gardening Symposium at Brightside St. Louis Demonstration Garden. $10. Register

8 am to 4 pm May 31st Missouri Wildflowers Nursery selling at Kirkwood Farmers Market. Order online for pick up at Market or purchase from what they bring that day.

1 pm June 14th St. Louis Public Library class at Central Library: Herbs in the Civil War!

9 am to Noon June 21st Webster Groves Herb Society Display at Missouri Botanical Garden. Garden Admission Free to St. Louis City and St. Louis County residents on Saturday and Wednesday morning, otherwise Admission Fee applies.

9 am to 5 pm June 21st Carnivorous Plant Society Show and Sale at Missouri Botanical Garden. Garden Admission Free to St. Louis City and St. Louis County residents on Saturday and Wednesday mornings, otherwise Admission Fee applies.

June 21-22 St. Louis Water Garden Society Pond-A-Rama tour. Tickets

9 am to 5 pm August 2nd-3rd Greater St. Louis Iris Society Plant Sale at Missouri Botanical Garden. Garden Admission Free to St. Louis City and St. Louis County residents on Saturday and Wednesday mornings, otherwise Admission Fee applies.

Noon to 5 pm August 10th Orchid Society of Greater St. Louis Auction at Missouri Botanical Garden. Admission Fee applies. Garden Admission Free to St. Louis City and St. Louis County residents on Saturday and Wednesday mornings, otherwise Admission Fee applies.

9 am August 16th Seed St. Louis Fall Seedling Sale at Carriage House, 3815 Bell

9 am to Noon August 16 Webster Groves Herb Society Display at Missouri Botanical Garden. Garden Admission Free to St. Louis City and St. Louis County residents on Saturday and Wednesday morning, otherwise Admission Fee applies.

9 am to 5 pm August 16th Missouri Botanical Garden Daylily Association Plant Sale at Missouri Botanical Garden. Garden Admission Free to St. Louis City and St. Louis County residents on Saturday and Wednesday mornings, otherwise Admission Fee applies.

9 am to 5 pm September 6th Gateway West Gesneriad Society Show and Sale at Missouri Botanical Garden. Garden Admission Free to St. Louis City and St. Louis County residents on Saturday and Wednesday mornings, otherwise Admission Fee applies.

2 pm September 17th Partners for Native Landscaping and St. Louis County Library Zoom Class: Missouri Native Trees and Shrubs for Urban Landscapes. Register

10 am to 2 pm September 22nd Bring Conservation Home Expo at Tower Grove Park. Missouri Wildflower Nursery and other vendors will be selling but you can also order plants for pick up at the event.

9 am to Noon September 27th Webster Groves Herb Society Display at Missouri Botanical Garden. Garden Admission Free to St. Louis City and St. Louis County residents on Saturday and Wednesday morning, otherwise Admission Fee applies.

2 pm October 1st Partners for Native Landscaping and St. Louis County Library Zoom Class: St. Louis Native Plants in a Changing Climate. Register

October 3rd-5th Best of Missouri Market at Missouri Botanical Garden. Missouri Wildflowers Nursery is usually a vendor and this is last opportunity to purchase native plants in St. Louis City for the year. Admission Fee applies.

October 5th-6th Baker Creek Fall Harvest Festival in Mansfield, Wright County, MO, about a 3 1/2 hour drive from St. Louis or Kansas City

2 pm October 15th Partners for Native Landscaping and St. Louis County Library Zoom Class: Native Gardening Maintenance Tips, Tricks and Hacks. Register

9 am October 18th Seed St. Louis Garlic Sale at Carriage House, 3815 Bell

Join us Sundays on Bluesky for #GardenSunday.