Growing Grass Under Black Walnut Trees: Tolerant Species by Region

Growing Grass Under Black Walnut Trees: Tolerant Species by Region

Black walnut toxicity (juglone) kills your grass. You’ve reseeded 4 times. Solution depends on your zone.

Zone 6 and North

Kentucky bluegrass tolerates juglone well. It grows under my black walnuts with no issues.

Zone 6b and South

Kentucky bluegrass struggles in heat. Try a pasture blend for your region (contact local ag extension). These mixes often include juglone-tolerant fescues, ryegrasses, and clovers.

General Tips

• Remove walnut leaves/nuts promptly—they concentrate juglone.
• Raise soil pH slightly (juglone more toxic in acid soil).
• Add organic matter—microbes degrade juglone faster.

Don’t fight the tree. Plant what lives with it.