Can I prune it at any time?

It is best to prune right after the spring flowering period. Avoid heavy pruning in late summer or fall.

Will it grow back thicker?

Yes, pinching the tips or cutting back after flowering will result in a much fuller, bushier plant next season.

Why is my Wild Blue Phlox looking so leggy? Causes and fixes

Check these first

Measure how many hours of light the plant gets.
Check if nearby plants are shading it out.
Look for new growth at the base of the stems.

Likely causes

Insufficient Light
Most likely
How to tell: The stems are long and weak with large gaps between the leaves. The plant leans heavily toward the nearest light source.
What to do: Move the plant to a spot with more filtered light or partial sun. If it is in a container, rotate it every few days to ensure even growth. Prune back the long stems to encourage bushier growth.
Lack of Pruning
Possible
How to tell: The plant is tall and floppy with old, woody stems at the base. It looks overgrown and lacks vigor.
What to do: Cut the plant back by one third after it finishes its first bloom cycle. This forces the plant to send out new, stronger side shoots. Feed with a balanced liquid fertilizer once after pruning to support new growth.

Leggy growth in other plants

Find out what's wrong with your wild blue phlox

The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

When to worry

It is only a problem if the plant is falling over or looks unhealthy. Some height is natural, but it should remain sturdy.

Stopping it coming back

Pinch back the growing tips in early spring to encourage a compact shape. Ensure the plant receives at least four to six hours of dappled light daily.

Wild Blue Phlox: leggy growth? Check yours with a photo

Every plant is a little different. Take a photo of your wild blue phlox and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.

Get the app · Or check it from a photo now, free

Questions people ask

Can I prune it at any time?: It is best to prune right after the spring flowering period. Avoid heavy pruning in late summer or fall.
Will it grow back thicker?: Yes, pinching the tips or cutting back after flowering will result in a much fuller, bushier plant next season.

Why is my Wild Blue Phlox looking so leggy?