Creeping phlox, known botanically as Phlox subulata, is a popular groundcover with vibrant spring blooms and a dense, mat-forming habit. This perennial plant creates a carpet of color, making it a favored choice for low-maintenance gardens. Its needle-like leaves remain green throughout the year in many climates, providing continuous interest. Creeping phlox is particularly effective in rock gardens, along borders, or cascading over walls due to its spreading nature.
Watering Established Creeping Phlox
Once established, creeping phlox benefits from infrequent yet deep watering. During prolonged dry spells or periods of heat, providing supplemental water becomes important. The frequency depends on factors such as soil type, sun exposure, and local climate conditions, but generally, watering once a week is often sufficient in well-draining soil. In hotter, drier weather, this might increase to every three to five days.
It is important to check the soil moisture before watering by inserting a finger about one to two inches deep; if it feels dry, it is time to water. When watering, apply water deeply and directly to the base of the plant to encourage robust root development. Allowing the soil to dry out between waterings is important to prevent root rot, as creeping phlox does not thrive in constantly soggy conditions.
Initial Watering for New Plants
Newly planted creeping phlox requires a different watering approach for root establishment. During this phase, consistent moisture is necessary. The soil should be kept consistently moist but not waterlogged to allow roots to settle effectively.
This often means watering new plants every couple of days. Gradually, as the plant matures and shows signs of establishment, reduce the watering frequency. For the first two to three weeks, watering at least once a week is recommended if there is no significant rainfall. This consistent moisture supports the development of a strong root network.
Identifying Watering Problems
Observing your creeping phlox helps diagnose improper watering. Signs of underwatering include wilting or drooping leaves, particularly during the hottest parts of the day. Foliage may also appear dry, crispy at the edges, or turn brown, indicating a lack of moisture. Stunted growth can also occur with consistent underwatering.
Conversely, overwatering often presents with yellowing leaves that may feel soft or mushy. Stems might become mushy, and the plant can exhibit a general lack of vigor. Prolonged overwatering can lead to root rot, where roots decay due to insufficient oxygen in saturated soil. Adjusting the watering schedule and ensuring proper drainage are key responses to these symptoms.
Creeping Phlox and Drought
Creeping phlox demonstrates drought tolerance once mature and well-established. This makes it a suitable choice for xeriscaping, which focuses on water conservation in landscaping. Its ability to thrive in drier periods contributes to its low-maintenance appeal.
To further conserve soil moisture and support the plant through dry spells, apply a layer of mulch around the plants. Mulch helps retain moisture in the soil and suppresses weed growth, which would otherwise compete for available water. The root system of established creeping phlox is well-adapted to access moisture deeper in the soil, enhancing its ability to cope with less frequent irrigation.