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Growing Phlox

Growing Phlox

Orange Perfection Hardy Garden Phlox


Phlox is a hardy North American Native perennial available in several different forms. Garden Phlox is hardy in zones 4 to 8 and has an upright habit with terminal flower clusters in summer. Creeping Phlox is zone 3 hardy, spring-blooming, and has a low-growing, trailing habit. Flowers of both types are attractive to butterflies, and Garden Phlox also attracts hummingbirds. Plant bare root Phlox outdoors 4 to 8 weeks before the last frost in spring. Prepare a hole large enough to fit all the roots without bending and amend with compost or other organic matter. Plant so the crowns are ½ to 1 inch below soil level.


For full sun to part shade, and best in moist, well-drained soils rich in organic matter. Tall varieties of Garden Phlox may benefit from staking, especially in windy areas. Their stems can be cut back in fall and removed from the garden to reduce powdery mildew problems. Creeping Phlox benefits from being cut back by a third to half after blooming.

Fertilizer Recommendations

Use full rates of Algoflash Flowering Plant 4-6-7 Liquid Fertilizer (51087), Neptune Fish & Seaweed Fertilizer 2-3-1 (51221), or Osmocote 14-14-14 (51173).

Alternative Products

A low-growing flowering perennial similar to Creeping Phlox is Zing Rose Dianthus (11312). Neon Sedum (14174) and Sante Shasta Daisy (11085) are tall perennials used like Garden Phlox.

Complimentary Products

Phlox is a moderate feeder that benefit from regular fertilization. Other North American native perennials include Heliopsis, Liatris, and Missouri Primrose.

Product Recommendations

20" Grow Through Plant Supports (53483) can be used to support stems of tall Garden Phlox varieties.

Phlox Facts

Garden Phlox is susceptible to powdery mildew. Prune out up to half of the stems in spring to promote good air flow, and plant mildew-resistant varieties to minimize problems. Creeping Phlox is significantly more mildew-resistant than Garden Phlox. It is sometimes attacked by mites and rabbits may feed on the plants. The name Phlox comes from the Greek word for "flame."

Growing Tips