White Clover

White clover (Trifolium repens) is technically a perennial — it lives for years and spreads by stolons — but it is most visible and most complained about in spring and fall when it is actively growing. It goes dormant-looking during summer heat, which means the phone calls come in seasonal waves. Spring is the heaviest complaint season; we field calls about clover within the first week or two of warm weather every year.

By definition, a weed is just a plant growing where you do not want it. Clover is one of the best examples of this. Some homeowners love clover — it fixes nitrogen from the air, stays green in drought, feeds pollinators, and provides a soft ground cover. For those homeowners, clover is not a weed. For homeowners who want a uniform fescue lawn, clover is a very visible broadleaf invader that stands out sharply against dark green fescue.

Clover is a dicot (broadleaf), which means it responds well to broadleaf-selective herbicides that do not harm your fescue. It is in the easy-to-control category — same tier as dandelion, plantain, and chickweed. A single well-timed application at the right rate handles it. The challenge is not chemistry — it is timing. Treating clover during active growth in spring or fall is effective. Treating in midsummer when it is semi-dormant is a waste of product.

Clover often indicates nitrogen deficiency in the soil. Because clover fixes its own nitrogen through root-nodule bacteria, it thrives in nitrogen-poor soil where fescue struggles. Sometimes the best long-term clover control is simply a proper fertilization program — once your fescue has adequate nitrogen and is growing thick and competitive, clover loses its advantage and thins out naturally even without herbicide.