Dahlia Leaf Curl: Overwatering, Not Disease

Mature dahlia leaves curling downward and browning while new growth stays upright is a classic sign of overwatering. The crown begins to rot, cutting off water to older leaves.

Correct Watering Practice

1. Water thoroughly until it drains from the bottom.
2. Wait until the soil feels dry to the fingertip (about 1 inch deep) before watering again.
3. Frequency varies: 5–10 days depending on pot size, soil mix, and light.

Why This Works

Dahlias need oxygen at the roots. Constantly wet soil suffocates them, leading to crown rot. Allowing the surface to dry restores aeration and prevents fungal pathogens.

No Fertilizer Needed Yet

Commercial potting mix feeds for 4–6 weeks. Resume feeding only when new growth is vigorous.