Fixing Supertunia Bud Drop: Fertilizer Timing, Pruning, and Sun Requirements

Supertunia Priscilla dropping buds before opening? Three fixes:

1. Stop fertilizing when watering. Water first, wait hours, then fertilize. Better: use time-release fertilizer (Proven Winners or Osmocote).
2. Petunias bloom at stem ends. Prune 2–3 stems back to 6″ weekly—each cut branches into two flowering stems.
3. Ensure sun hits basket from 9 AM to 1 PM (includes noon). Less sun = fewer blooms.