Rough-stem Rosinweed (Silphium radula) in the Silphiums Database

Common names:
Give a thumbs up Rough-stem Rosinweed
Give a thumbs up Showy Rosinweed
Give a thumbs up Roughstem Rosinweed

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Minimum cold hardiness: Zone 5a -28.9 °C (-20 °F) to -26.1 °C (-15 °F)
Maximum recommended zone: Zone 9b
Plant Height: 36 - 72 inches
Plant Spread: 24 - 36 inches
Fruit: Edible to birds
Flowers: Showy
Flower Color: Yellow
Bloom Size: 1"-2"
2"-3"
Flower Time: Summer
Underground structures: Taproot
Uses: Will Naturalize
Edible Parts: Fruit
Wildlife Attractant: Bees
Birds
Butterflies
Propagation: Seeds: Stratify seeds: 3 months at 40 degrees

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Horntoad On April 15, 2015 Bloomed
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Discussion Threads about this plant
Thread Title Last Reply Replies
What is this pretty wild flower? by IJsbrandtGA Sep 10, 2015 3:30 PM 7
Do you garden with Wildflowers? Tell us all about it. by frostweed Mar 20, 2014 5:21 PM 130
I thought I knew its name but now I'm not sure by wildflowers Jun 17, 2012 7:34 AM 15

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