How to Plant Phlox


Garden phlox is a tall perennial that provides color for six weeks or longer during the summer. This fragrant plant is available in a variety of colors; it can be used in the background or along narrow borders where height and color are needed. Spring is the best time to plant or divide phlox.

Step 1

Plant your phlox in well-drained soil. Check the label on your plant; some phlox thrive in full sun while others prefer shade.

Step 2

Till the soil 12 to 15 inches deep while adding 2 to 4 inches of compost. This will assist with moisture retention and drainage.

Step 3

Dig a hole for the plant that is twice the diameter of the root ball and as deep as the container. Space the holes 1 to 2 feet apart.

Step 4

Turn the container upside down and tap on the sides and bottom to remove the plant.

Step 5

Place the plant in the hole, making sure the top of the root ball is at the soil surface. Fill in around the roots with soil and gently pack it.

Step 6

Sprinkle a starter fertilizer around the base of the plant and water thoroughly.

Step 7

Apply a 10-10-10 fertilizer each month of the growing season. Water the plants immediately after application to assist with absorption.

Step 8

Soak the plants deeply once a week if rainfall is less than 1 inch a week.

Step 9

Cut old flower stems as the color fades; this will promote new blooms. Cut the stems to 2 inches after fall's killing frost.

Step 10

Divide tall varieties of garden phlox every two to three years in the spring to control disease associated with dense growth.

Things You'll Need

  • Tiller
  • Compost
  • Shovel
  • All-purpose fertilizer
  • Mulch


  • Tall Garden Phlox
  • Garden Hobbies: How to Grow Phlox
  • Plant Care Guides
Keywords: planting phlox, growing garden phlox, perennial phlox plants

About this Author

Jennifer Loucks has been writing since 1998. She previously worked as a technical writer for a software development company, creating software documentation, help documents and training curriculum. She now writes hobby-based articles on cooking, gardening, sewing and running. Loucks also trains for full marathons, half-marathons and shorter distance running. She holds a Bachelor of Science in animal science and business from University of Wisconsin-River Falls.