There are several species of Phlox which are grown in the home landscape. They start with Phlox subulata (moss phlox) in late April to Phlox divaricata (woodland phlox) in May and on to Phlox paniculata (garden phlox) in the summer.

Phlox species are available in heights ranging from groundcovers such as moss phlox and woodland phlox up to types of garden phlox which may reach heights of 4 feet or more.

 

In general, all of the phlox prefer full sun but will tolerate some shade. They prefer a light, well-drained soil with plenty of organic matter.  For those types that are susceptable to powdery mildew, a site with good air drainage helps. Avoid low lying sites where humid air will settle on hot days in late summer. Choose a place where the breeze can move through easily.

No special requirements. Plant the same as any other herbaceous perennial.

Deadhead regularly to keep them blooming except the moss phlox.

The key problem with Phlox paniculata and a few other species is their susceptibility to powdery mildew. You can treat it with fungicides but a more acceptable approach is to seek out mildew resistant species and cultivars. It is no fun to have to spray your flower beds so do whatever you can to find a non-chemical control measure.

Also, see the comments of selecting a site for your phlox above.

Be sure to plant only phlox which are rated as hardy for your climate zone to avoid any need for winter protection.

Division is the most common form of propagation for phlox. However, species such as Phlox paniculata can be propagated by root cuttings.

Note: We have provided some general information and observations on this topic aimed at the home gardener. Before you take any serious action in your landscape, check with your state's land grant university's Cooperative Extension Service for the most current, appropriate, localized recommendations.

 

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