When it comes to dividing phlox, timing is key. The best times to divide garden phlox (Phlox paniculata) are in the spring or late summer/early fall. Let me break down the process for you.
In the spring, it’s ideal to divide phlox just as new growth begins to appear. This is usually when you start seeing the first shoots emerging from the ground. At this stage, the plants are still dormant but starting to wake up from their winter slumber.
To begin, carefully dig up the entire plant using a garden fork or shovel. Be sure to dig wide and deep to avoid damaging the root system. Gently lift the clump out of the ground, taking care not to break any of the shoots or roots.
Once you have the clump out of the ground, it’s time to divide it into smaller sections. You can use a sharp knife or garden shears to do this. The goal is to separate the clump into individual divisions, each containing at least 2 or 3 shoots and a portion of the root system.
When dividing, make clean cuts to minimize damage to the plant. If the clump is particularly large, you may need to make multiple divisions. Remember, the more shoots and roots you include in each division, the better chance it has of establishing itself as a new plant.
After dividing, you can replant the divisions in their desired locations. Make sure to prepare the soil beforehand by loosening it and adding organic matter, such as compost, to improve its fertility. Dig a hole slightly larger than the division and place it in, making sure the roots are spread out and covered with soil. Gently firm the soil around the plant to eliminate air pockets.
Water the newly divided phlox thoroughly after planting to help settle the soil and provide moisture to the roots. Regular watering in the following weeks is essential to ensure the divisions establish themselves successfully.
If you prefer dividing phlox in late summer or early fall, the process is similar. However, instead of waiting for new growth in the spring, you should divide the plants when they have finished flowering or as the foliage begins to yellow and die back. This timing allows the divisions to establish themselves before winter arrives.
Dividing phlox can be done either in the spring or late summer/early fall. Whichever time you choose, remember to dig up the plants carefully, divide them into sections with at least 2 or 3 shoots and part of the root system, and replant them in prepared soil. Watering and regular care after dividing will help ensure the success of your new phlox plants.
