Watering Phlox

Water newly planted phlox at least once a week for a few weeks. Then water during extended dry periods or when the top couple of inches of soil dries out. Phlox prefers growing in moist but not water-logged soil. When watering, water the soil and not the leaves. A long-handled wand hose attachment works well. Adding a layer of organic mulch helps to retain soil moisture and controls weeds.


How To tell If Phlox Needs Watering

Wilted leaves and stems are signs that a phlox plant needs watering. If the plant does not have access to moisture for more than a few days, the leaves will turn yellow, then brown, and eventually, fall off. Over-watering can lead to root rot. Improperly watered plants become weak and more susceptible to disease and insect infestations.

How Often To Water Phlox

Water phlox immediately after planting. For the first two or three weeks, water at least once a week if no significant amount of rain falls. Check the soil for dryness during hot weather.

Established phlox do well if they receive an inch of water a week via a combination of rainfall and/or hand watering. Water the soil and not the leaves if possible. 

How frequent to water potted phlox

Container grown phlox should receive an inch of water a week. It’s better to water deeply until water begins to seep out the drainage hole rather than to water sparingly every day. Phlox grown in non-glazed containers such as clay pots will need watering more often. The soil dried out quicker in non-glazed or dark-colored containers.


Best Time To Water Phlox

The best time of the day to water phlox and other garden plants is in the morning. Phlox plants die back and go dormant during the winter months. They do not need to be watered during dormancy.

How To Water Phlox

Step 1 - Is the soil dry?

Use your finger to check the moisture level in the soil an inch or two below the surface. If the soil feels dry, the phlox needs watering.

Step 2 - Water the soil.

Use a hose sprayer or watering wand on a gentle setting or watering can to wet the soil around the base of the plant. Add enough water to saturate the garden soil a few inches below the surface. Add water to potted plants until it begins to seep out the drainage hole.

Step 3 - Repeat.

If no significant rain has fallen within a few days of watering, check the soil moisture level for dryness. Check the soil in container-grown plants every day or two during hot weather.

Phlox Watering Tips

  • · Water the soil, not the leaves.
  • · Do not over-water
  • · Use a watering wand if possible.
  • · Container-grown plants often need watering more frequently than garden-grown ones.


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 Author Maureen Farmer - Published 02-22-2022