Oxalis: The Seed-Shooting Weed Taking Over Virginia Beds

The weed that explodes seeds 20–30 feet when touched is creeping woodsorrel, Oxalis corniculata (or yellow woodsorrel, O. stricta). It has clover-like leaves and small yellow flowers. It thrives in disturbed soil—especially where Roundup killed competitors.

Control in flower beds:

• Pre-emergent: Apply corn gluten meal in early spring (inhibits seed germination).
• Post-emergent: Spot-spray young plants with glyphosate (shield desirables) or horticultural vinegar (20% acetic acid).
• Hand-pull: Before seed pods form. Dispose of plants—don't compost.
• Mulch heavily: 3 inches of wood chips suppresses germination.

In lawn: Use a selective broadleaf herbicide (e.g., Scotts Turf Builder Weed & Feed) on actively growing weeds. Mow frequently to prevent seeding.

Persistence is essential—seed bank lasts years.