Sea Lettuce (Ulva Rigida) is a perennial aquatic in the Ulvaceae family with easy care difficulty. It requires aquatic watering and full sun or partial shade light in USDA hardiness zones 3-11. This plant is safe for cats and dogs.

Ulva rigida is a species of green algae characterized by its rigid, sheet-like thallus often found in marine intertidal zones.

Sea Lettuce

Sea Lettuce

Ulva Rigida

Ulva rigida is a species of green algae characterized by its rigid, sheet-like thallus often found in marine intertidal zones.

Quick Facts

Type
aquatic
Lifecycle
perennial
Care Difficulty
Easy
Water Needs
aquatic
Light
Full Sun, Partial Shade
Hardiness Zones
3-11

Safety

🐕
Pet Safe
👶
Child Safe
Non-Toxic

Growing Conditions

Soil Types:saline, rocky
Indoor:No
Outdoor:Yes
Garden Use:groundcover in marine aquaria, erosion control in coastal areas

Care Calendar

Monthly care tasks for Sea Lettuce

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 Lettuce
Sea Lettuce detail

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Taxonomy

Family:Ulvaceae
Genus:Ulva