How to Trim Snapdragons


Snapdragons are striking additions to garden beds and borders. The upright stalks support multiple blooms along each one, with flowers ranging in color from pink and purple to yellow and orange. There are many types of snapdragons available, from low-growing dwarf varieties to tall and stately plants. While snapdragons are fairly low-maintenance, they do benefit from light pruning. Trimming your snapdragons correctly helps extend the blooming period while keeping the plants well-kept and attractive.

Step 1

Deadhead the snapdragons throughout the summer blooming period. Cut the dead or withering blooms off the plant just beneath the flower with a sharp, clean knife or gardening shears.

Step 2

Cut back the entire plant in mid-summer when the snapdragons begin blooming less profusely. Cut the plants down to 6 inches tall and dispose of or compost the garden debris.

Step 3

Fertilize the snapdragons immediately after cutting back with a phosphorus-rich flower fertilizer, which encourages further blooming on the flowers. Follow the fertilizer label instructions for dosage.

Step 4

Water thoroughly after trimming and fertilizing, providing approximately 1 inch of water per plant.

Tips and Warnings

  • Sterilize garden knives and shears before trimming the snapdragons, otherwise you may spread disease to your plants. Rinse them in a dilute bleach solution after every use.

Things You'll Need

  • Knife
  • Shears
  • Fertilizer


  • University of California Extension: Snapdragons
  • University of Illinois Extension: Snapdragons
Keywords: trimming snapdragons, pruning snapdragon plants, flower care

About this Author

Jenny Harrington is a freelance writer of more than five years' experience. Her work has appeared in "Dollar Stretcher" and various blogs. Previously, she owned her own business for four years, selling handmade items online, wholesale and via the crafts fair circuit. Her specialties are small business, crafting, decorating and gardening.