Sea Knotgrass (Polygonum Maritimum) is a perennial herb in the Polygonaceae family with easy care difficulty. It requires moderate watering and full sun or partial shade light in USDA hardiness zones 7-10. This plant is safe for cats and dogs.

Polygonum maritimum, commonly known as sea knotgrass, is a perennial herbaceous plant adapted to coastal environments.

Sea Knotgrass

Sea Knotgrass

Polygonum Maritimum

Polygonum maritimum, commonly known as sea knotgrass, is a perennial herbaceous plant adapted to coastal environments.

Quick Facts

Type
herb
Lifecycle
perennial
Care Difficulty
Easy
Water Needs
Moderate
Light
Full Sun, Partial Shade
Hardiness Zones
7-10

Safety

🐕
Pet Safe
👶
Child Safe
Non-Toxic

Growing Conditions

Soil Types:sandy, loamy, saline
Indoor:No
Outdoor:Yes
Garden Use:groundcover, erosion control, habitat support

Care Calendar

Monthly care tasks for Sea Knotgrass

Jan
Prune
Feb
Fertilize
Mar
Repot
Apr
Water+
May
...
Jun
...
Jul
...
Aug
...
Sep
...
Oct
...
Nov
...
Dec
...

Expert Care Tips

Pro tips from botanists and plant experts

Watering Tip

Check soil moisture by inserting your finger 1 inch deep. Water only when the top layer feels dry to prevent overwatering.

Humidity Trick

Group plants together to create...

Growth Hack

Rotate your plant every...

Photo Gallery10+ photos

Sea Knotgrass
Sea Knotgrass detail

View leaf details, flowers, seeds & more in the app

Taxonomy

Family:Polygonaceae
Genus:Polygonum