One of the best heat and sun tolerant flowers to pick for spilling over the sides of garden walls, containers, and baskets are petunias, specifically those with a trailing or cascading habit.

Petunias are trailing plants with many-colored tubular flowers that have been popular for generations. Calibrachoa is a similar flower (like petunia, native to Brazil) that didn’t catch on with ...

The proper spacing depends on the variety. Multiflora and grandiflora petunias should be spaced about 12 inches apart and trailing petunias at least 18 inches apart. Compact Milliflora petunias ...

Most petunia varieties become leggy over time. The trailing stems grow longer with fewer blooms, giving the entire plant a scraggly appearance. By midsummer, it's usually time to cut back petunias ...