How to Grow Annual Phlox (Phlox Drummondii)

Start annual phlox indoors from seed - you'll have the best selection of color with seeds.

Select a suitable site for planting. Annual phlox loves full sun with average, well-drained soil and moderate water.

Pinch off any blooms from seedlings before you plant to direct growth into strong roots.

Plant annual phlox seedlings 4 to 6 inches apart in early spring once nighttime temperatures are regularly above 35 degrees.

Prepare the bed by working in a little compost or sphagnum peat moss.

Mulch with dried grass clippings, pine needles, wood chips or another organic material.

Water in the mornings, taking care not to spray the leaves, which are prone to disease.

Pinch off spent blooms to promote longer bloom time.

Fertilize once every four to six weeks with a water-soluble fertilizer if desired.

Pull plants out of the garden after the first frost.