History of the White House Gardens and Grounds
2025-05-21 19:00 - 21:00 (America/New_York) | 54 Walden St.
with Matthew Costello, Chief Education Officer for the White House Historical Association. He previously worked on the George Washington Bibliography Project for the George Washington Papers at the University of Virginia. His books include The Property of the Nation: George Washington’s Tomb, Mount Vernon, and the Memory of the First President and a chapter in James Hoban: Designer and Builder of the White House. Costello also teaches White House history at American University.
Community Open Meeting with Seeds and Weeds

Annual Meeting and Luncheon
2025-06-18 11:00 - 13:00, 2026-06-17 11:00 - 13:00 | Concord Country Club, 246 Old Rd to 9 Acre Corner, Concord, MA, United States

Annual Meeting and Luncheon
2025-08-31 08:00 - 17:00
Concord Country Club
246 Old Road to Nine Acre Corner

Ag Day
2025-09-06 10:00 - 14:00 | Main Street, Concord

Welcome Back Social
2025-09-17 17:00 - 18:30 | 1501 Monument Street, MA
Hosted by Serena Crosina

Flower Arrangement Face-Off
2025-10-15 11:00 | Trinitarian Congregational Church, 54 Walden St, Concord, MA, 01742
with Jeanne Hamilton, Erika Rodriguez and Serena Crosina

Auction
2025-11-19 18:30 | TBD

Holiday Wreaths (Sign-up Genius)
2025-12-01 10:00

Cans for Caring Workshop (Sign-up Genius)
2025-12-02 09:30 - 11:00 | 315 Lexington Rd.
Hosted by Elllen Whitney

COA Holiday Workshop (Sign-up Genius)
2025-12-04 13:00 - 14:30

Holiday Luncheon
2025-12-10 11:00 | 675 Sudbury Road
Hosted by Julia Farwell-Clay

Floral Witness: Opening the Spirit to Time and Place by Elleln Whitney
2026-01-21 11:00 | 54 Walden St.
Trinitarian Congregational Church

Ask the Experts: Lili Morss, Charity Tremblay, Marty Wallace
2026-02-18 13:00 | 54 Walden St.

Spring Outreach
2026-03-18 10:30 - 14:00
Barn at the Nashoba Brooks School
200 Strawberry Hill Road

Concord's Incomparable Botanical Legacy, by Cherry Cory
2026-04-15 13:00 | Trinitarian Congregational Church, 54 Walden St, Concord, MA, 01742
54 Walden Street

Arbor Day
2026-04-24 10:00 - 12:00 | TBD
Location TBD

Plant Sale
2026-05-09 08:00 | Trinitarian Congregational Church, 54 Walden St, Concord, MA, 01742, United States

Open Meeting, hosted with Seeds and Weeds
2026-05-13 19:00 - 21:00 | Trinitarian Congregational Church, 54 Walden St, Concord, MA, 01742, United States
No Till Methods in Home Gardens & Other Soil Topics
By Mari Congdon of Gaining Ground

test
2026-08-19 08:00 - 17:00

st 3
2026-09-08 08:00 - 17:00 | 102 Sudbury Rd.

test 2
2026-09-10 08:00 - 17:00
