Tall Flatsedge (Cyperus Eragrostis) is a perennial herb in the Cyperaceae family with easy care difficulty. It requires very high watering and full sun or partial shade light in USDA hardiness zones 8-11. This plant is safe for cats and dogs.

A perennial sedge with triangular stems, long narrow leaves, and distinctive greenish-yellow flowerheads.

Tall Flatsedge

Tall Flatsedge

Cyperus Eragrostis

A perennial sedge with triangular stems, long narrow leaves, and distinctive greenish-yellow flowerheads.

Quick Facts

Type
herb
Lifecycle
perennial
Care Difficulty
Easy
Water Needs
very high
Light
Full Sun, Partial Shade
Hardiness Zones
8-11

Safety

🐕
Pet Safe
👶
Child Safe
Non-Toxic

Growing Conditions

Soil Types:clay, silty, loamy, peaty
Indoor:No
Outdoor:Yes
Garden Use:groundcover, erosion control, wildlife habitat

Care Calendar

Monthly care tasks for Tall Flatsedge

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

Tall Flatsedge
Tall Flatsedge detail

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Taxonomy

Family:Cyperaceae
Genus:Cyperus