Why Petunias Fail While Other Annuals Thrive: Disease Resistance and Care

If only petunias die in a thriving bed, soil isn’t the issue. Heirloom petunias are disease-prone; switch to hybrids like Celebrity or Wave series (available at Park Seed or garden centers). Prune monthly by one-third to prevent legginess and stimulate blooms. Avoid overwatering—petunias prefer soil to dry between waterings; wet soil causes root rot and similar symptoms.