How to Care for Your Garden Phlox


Garden phlox is a herbaceous perennial flower native to temperate North America. It can grow up to 3 feet in height and blooms in July, August and September. The flowers can be pink, white, red or purple in color, and grow in small clusters. Garden phlox requires regular care to maintain, but can be easily grown in most temperate climates around the world.

Step 1

Plant garden phlox during early spring, just after the final frost of winter, in a location that receives direct sunlight throughout the day. Spread 4 inches of organic compost over the planting site and use a garden tiller to incorporate it into the soil.

Step 2

Water garden phlox once per week during spring, summer and fall. Reduce frequency to once every two weeks during winter. Increase watering to twice per week during periods of drought, when more than 1 week has passed without rainfall.

Step 3

Feed garden phlox using a 5-10-5 NPK fertilizer in early spring to encourage the growth of flowers instead of foliage. Water thoroughly both before and after applying the fertilizer. Apply following the directions provided on the package.

Step 4

Remove dead or fading garden phlox flowers as soon as possible to prevent them from turning to seed. Pinch them off as close to the stem as possible and new flowers will replace them after a short time.

Step 5

Remove all but the five healthiest stems once the plant has grown to about 6 inches in height to increase air circulation. Thinning also allows garden phlox to grow more thickly and produce more flowers.

Tips and Warnings

  • Garden phlox is commonly eaten by groundhogs, deer and rabbits. The plant should be fenced off in gardens that are accessible to wildlife.

Things You'll Need

  • Organic compost
  • Garden tiller
  • Fertilizer


  • Tall Garden Phlox for Minnesota Gardens
  • 10 Easy Care Perennials; Marcella Shaffer; 2001
  • New York Gardener's Guide; Ralph Snodsmith; 2004
Keywords: garden phlox, phlox, phlox flowers

About this Author

Willow Sidhe is a freelance writer living in the beautiful Hot Springs, AR. She is a certified aromatherapist with a background in herbalism. She has extensive experience gardening, with a specialty in indoor plants and herbs. Sidhe's work has been published on numerous Web sites, including