How to Make Petunias Last


Petunias are hardy annuals, favorites of gardeners for their long blooming season, beautiful colors and ease of growing. Whether in containers, growing along borders or weaving around rock gardens, petunias need minimal care for maximal results from spring to late summer.

Step 1

Deadhead petunias as blooms droop. Once the plants seed, they will propagate for the next season. If you never let the plant get to the seeding stage, you will prolong the bloom time and force the plant to expend its energy on more and more blooms. Deadhead by pinching at the base of the bloom and pulling gently until the flower releases.

Step 2

Fertilize regularly using a balanced ratio fertilizer through the whole season.

Step 3

Prune in mid-summer once shoots get long and stringy-looking. New growth will come in bushier and produce a new round of first blooms. Use sharp scissors or gardening shears to prune with one quick snip about 1 to 2 inches from the base of the plant. Water and fertilize immediately after pruning.

Tips and Warnings

  • Japanese beetles like to snack on petunia blooms. If your flowers show signs of holes, place a Japanese beetle trap upwind from your blooms to protect them.

Things You'll Need

  • Petunias
  • Fertilizer in a balanced formula
  • Gardening shears


  • Petunia Fact Sheet

Who Can Help

  • National Gardening Bureau: Petunias
Keywords: petunias, annuals, container gardening

About this Author

Bobbi Keffer attended Kent State University, studying education but soon found her true love to be in the garden. She prides herself on her frugal skills, re-using, recycling, and re-inventing her whimsical style in her home and garden.