Polygonum maritimum
Care, watering, light and tips for Polygonum maritimum on Floravia.
Quick facts
- Family: Polygonaceae
- Difficulty: Easy to care for
- Watering: every 7 days
- Light: Partial shade
- Temperature: 10–30 °C
- Toxicity: Toxic to pets
About Polygonum maritimum
Polygonum maritimum, commonly known as Sea Knotgrass, is a robust and salt-tolerant perennial herbaceous creeper native to sandy coasts and dunes. Its reddish stems and bluish-green oval leaves form a dense mat, perfect for stabilizing coastal soils or as ground cover in Mediterranean or xeriscape gardens. It produces small whitish or pinkish flowers in the leaf axils during summer, adding a subtle touch of color to the landscape.
Native range
Coasts of Europe, North Africa, and Western Asia.
Care tips
This species thrives in full sun and tolerates high salinity and strong winds. It requires sandy, well-drained soil and is very drought-tolerant once established, so watering should be minimal and infrequent. A common mistake is overwatering, which can lead to root rot; it prefers neglect in this regard. It does not require frequent fertilization and is low-maintenance.
How to save a dying Polygonum maritimum
- Warning signs
- Wilted or yellowing leaves, soft stems. Can indicate over or under-watering, or poor soil.
- First aid
- Check soil moisture. If dry, water deeply. If waterlogged, aerate and reduce watering. Consider repotting to sandy soil.
- What kills it
- Overwatering and heavy, waterlogged soils, or prolonged drought. It's a coastal plant that prefers good drainage.
- Can it be saved?
- Yes, if you act quickly. It's quite resilient. Ensure good drainage and proper watering.