Is Phlox hardy?

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Author: Louise Ward
Date Of Creation: 11 February 2021
Update Date: 10 May 2024
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What Happens When You Top Tall Phlox.
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Water your phlox well in winter!

Is Phlox hardy?

There are both annual as well as perennial phlox in different colors and growth forms. The one-year Phlox is not hardy and needs to be seeded every year. The perennial phlox is hardy to about - 20 ° C.

Among the perennial Phlox varieties you will find almost all growth forms from low ground cover to high-growing perennials. The flowering times are so different that you can look forward to numerous flowering plants from spring to autumn. For this you only have to select the seeds or young plants specifically.

By cutting back some shoots before flowering, you can extend the flowering time of each plant once again. Cut off all the faded immediately, then flowering many varieties of the phlox even a second time.

How to care for Phlox in winter?

Like all hardy plants, the phlox needs sufficient water in winter. As long as the ground is not frozen, you should water your poppy, albeit slightly less than in the warm season. Even a mulch layer prevents your phlox from drying out. You can do without fertilizer. The phlox needs it only during the growth phase.


Some phlox varieties are sensitive to the blazing sun. You also need a sunscreen in winter. If you have planted your phlox in the semi-shade, then keep in mind that the leaves of the sun-protecting trees are not present in winter.

Your Phlox usually does not need a cold protection. A layer of foliage or brushwood, however, protects it from extreme frost or during a very long frost period. The roots of potted plants are more likely to suffer from frost than plants in the flowerbed. Therefore, do not place the plant pot directly on the freezing soil and, if necessary, wrap it with a bubble wrap or similar.

The most important winter tips:

Tips & Tricks

The biggest danger for many plants in winter is not the frost, but a lack of water. That's why you do not forget about casting in the frost-free time.