How to Propagate Phlox


Phlox are garden perennials that bloom for a long time during summer. It's easy to propagate phlox by taking cuttings from the tips of their stems. Do this when they are flowering, and the stems will be at the perfect stage of growth to form roots. Take a few more cuttings than you think you need because the mortality rate of cuttings is high.

Things You'll Need

  • Rooting powder Shallow container Sand or vermiculite Plastic bag
  • Take cuttings from the tops of branches that are flowering. Cut a 6- to 8-inch length of stem that has at least four sets of leaves. Remove the flower.

  • Dip the cuttings into rooting powder.

  • Put cuttings into rooting medium. Fill a shallow container with 4 to 5 inches of sand or vermiculite. Water well but do not soak. Insert the eraser end of a pencil into the medium to make a hole. Insert the cutting into the prepared hole and firm the sand or vermiculite around the cutting so it stands up by itself.

  • Insert the entire container into a plastic bag, but do not seal it. (This is to provide extra humidity to the cuttings.) If excessive condensation forms on the inside of the plastic bag, remove the container of cuttings to help prevent mold or fungal diseases.

  • Wait approximately four to six weeks. To test whether a cutting has rooted, pull on it gently. If it has formed roots, it will resist a gentle tug. Plant rooted cuttings.

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