Undersized Vegetables
My squash, cucumber, beet and Swiss chard plants appear to be undersized. Five years ago we had a very large tree adjacent to the garden cut down. When I dig in the garden I still find roots. Could there be a problem with the soil because of the tree roots? Would a soil test tell me anything?
A soil test is always a helpful tool in establishing and managing a garden or landscape. Contact your local University Extension office. If the tree you removed was a black walnut, it could be the problem. All parts, including the roots or black walnuts contain juglone, a substance toxic to many plants. It can take 5 to 10 years for the roots to decompose and lose their toxicity. If this is the case – patience or moving the garden is the solution. If the tree wasn’t a black walnut the plants may be lacking nutrients temporary tied up during the decomposition of the old roots. A little additional nitrogen fertilizer will help compensate for this temporary shortage. Don’t overdo the nitrogen or you will have large plants with no roots or fruits to eat. Follow your soil test recommendations to improve the health and productivity of your garden.
Related
Upcoming
Events & Webinars
Mar. 18, 2026
FREE WEBINAR:
Patio, Deck and Balcony Gardens
Register here
March 21 & 28, 2026
REALTORS Home & Garden Show
West Allis, WI
More information
March 24, 2026
SC Johnson Golden Rondelle Theater
Community Program
Racine, WI
More information
March 26, 2026
FREE WEBINAR:
Getting Started Growing Vegetable and Flower Gardens
Register here
April 1, 2026
FREE WEBINAR:
Growing a Bountiful Harvest
Register here
April 9, 2026
FREE WEBINAR:
7 Steps to Managing Water on Your Property
Register here
April 11, 2026
A Day in the Garden
Fond du Lac, WI
Register here
April 18, 2026
3rd Annual Spring Rally
Oshkosh, WI
Register here
April 19, 2026
Ebert's Greenhouse Village
Ixonia, WI
April 23, 2026
Iowa State University
More information
April 25, 2026
Pasquesi Home & Gardens
Lake Bluff, IL
April 26, 2026
Ebert's Greenhouse Village
Ixonia, WI
May 2, 2026
Ebert's Greenhouse Village
Ixonia, WI
May 6, 2026
FREE WEBINAR:
Adding Native Plants
to Any Size Gardening Space
Register here
May 7, 2026
Wauwatosa Public Library
Wauwatosa, WI
May 9, 2026
Ebert's Greenhouse Village
Ixonia, WI
May 10, 2026
Ebert's Greenhouse Village
Ixonia, WI
May 13, 2026
Roots & Branches
West Bend, WI
Register here
May 16, 2026
Ebert's Greenhouse Village
Ixonia, WI
May 17, 2026
Ebert's Greenhouse Village
Ixonia, WI
May 21, 2026
FREE WEBINAR:
Planting & Care of Your Rain Garden
Register here
June 3, 2026
FREE WEBINAR:
Managing Your Landscape
with Pollinators in Mind
Register here
Sept. 3, 2026
FREE WEBINAR:
Tree Planting and Care
Register here
Sept. 12, 2026
Knowledge in Bloom Conference
Milwaukee, WI
Register here
Sept. 17, 2026
FREE WEBINAR:
Fall Landscape Care and Planting
Register here
WATCH ON-DEMAND WEBINARS
Learn More
Book an Appearance
Sign up for Melinda's free e-newsletter for a chance to win a Birds & Blooms' Ultimate Gardening Guide!
ENTER NOW
