Horse manure from hay treated with picloram (Grazon) retains herbicide activity 60-300 days. Tomatoes, flowers, raspberries damaged. Spread contaminated compost on lawn for weed control. Test future manure with tomato bioassay (1:1 mix with potting soil).
Testing Manure for Herbicides
tomato herbicide damage
tomato herbicide damage
tomato herbicide damage
Using Chicken Manure Safely: Compost First, Then Apply
Tomato Hornworms: Large but Harmless Caterpillars
Protecting Vegetable Garden from Unknown Pests
Starting an English Garden in South Florida Zone 10–11
Designing a Cold-Climate Bog Garden in South Dakota
Carnivorous Plant Recommendations for a Bingen, Washington Garden
Mulching a Large Vegetable Garden: Best Materials and Weed Control
End-of-Season Garden Cleanup: Normal Leaf Dieback and Fall Planting
Best Aquatic Plants for Water Gardens: Marginals, Lilies, and Edge Plantings
Designing a Flower Garden: Types, Furniture, Plant Selection, and Maintenance Basics
Designing a Charming Country-Style Garden for Small Spaces
Essential Garden Housekeeping for Health & Beauty
Growing Hibiscus: A Complete Guide to Tropical Beauty in Your Garden
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