Plant CarePetunia Growing Tips
Head of Operations · April 4, 2026
Petunias are one of the best performers in Indiana, but they do have a few quirks. The biggest challenge is rain—during wet stretches, older varieties can get beat up and stop looking their best. The good news is newer genetics like Durabloom and Headliner are much more resilient and tend to bounce back quickly while also being self-cleaning, so you don't have to deadhead.
Petunias are also heavy feeders. For best results, use a balanced liquid fertilizer like Jack's Classic Petunia Feed 20-6-22 or Miracle-Gro Water Soluble Bloom Booster 15-30-15 once a week. If they start to fade, it's usually a feeding issue—not the heat.
If you want something even tougher, SuperCal Petchoas (a petunia × calibrachoa cross) are an excellent option for Indiana conditions. They handle rain better and recover faster while still giving you that full, colorful look.
Quick Reference
- ✓ Light: Full sun (6+ hours)
- ✓ Water: Keep evenly moist, especially in containers
- ✓ Feeding: Regular feeding is essential — weekly liquid fertilizer
- ✓ Best For: Hanging baskets, patio pots, landscape color
Hoosier Tip
If your petunias start looking tired mid-summer, don't give up—trim them back, feed them, and they'll usually come back strong within a couple weeks.
More on plant care, every Friday
Three growing guides like this one and a short note from the greenhouse, free, once a week. Written for Indiana gardens.
Reference: Purdue University Extension — Indiana gardening resources
