These produce large, spectacular blooms (up to 4-5 inches across). They are stunning in beds and containers but are a bit dramatic—they hate heavy rain and need protection to keep those big flowers from getting soggy and mushy.
Planting and establishment. Focus on root growth. petunia season
| Feature | Petunia | Calibrachoa (Million Bells) | Geranium | | :--- | :--- | :--- | :--- | | | Large to medium | Very small | Large clusters | | Maintenance | Moderate (pruning, water) | Low (no pruning) | Low | | Heat Tolerance | Excellent | Good | Excellent | | Stickiness | Yes | No | No | | Best Use | Ground cover, baskets | Baskets only | Borders, pots | These produce large, spectacular blooms (up to 4-5
The "second bloom." Enjoy deep colors until the first frost. Focus on root growth
When the last threat of frost has passed and the soil warms, "Petunia Season" officially begins. Typically running from late spring (mid-May in northern zones) straight through to the first hard frost of autumn (October or November), this is a marathon of floral performance. Whether cascading from a hanging basket, filling a border, or spilling over a stone wall, petunias define the look of a cheerful, thriving summer garden.