Roughstem Rosinweed (Silphium Radula) is a perennial herb in the Asteraceae family with easy care difficulty. It requires moderate watering and full sun light in USDA hardiness zones 6-9. This plant is safe for cats and dogs.

Silphium radula, commonly known as Roughstem Rosinweed, is a tall perennial herb native to the southeastern United States, characterized by its thick white-haired stems and bright yellow daisy-like flowers.

Roughstem Rosinweed

Roughstem Rosinweed

Silphium Radula

Silphium radula, commonly known as Roughstem Rosinweed, is a tall perennial herb native to the southeastern United States, characterized by its thick white-haired stems and bright yellow daisy-like flowers.

Quick Facts

Type
herb
Lifecycle
perennial
Care Difficulty
Easy
Water Needs
Moderate
Light
Full Sun
Hardiness Zones
6-9

Safety

🐕
Pet Safe
👶
Child Safe
Non-Toxic

Growing Conditions

Soil Types:sandy, loamy
Indoor:No
Outdoor:Yes
Garden Use:pollinator support, ornamental

Care Calendar

Monthly care tasks for Roughstem Rosinweed

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

Roughstem Rosinweed
Roughstem Rosinweed detail

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Taxonomy

Family:Asteraceae
Genus:Silphium