![Rosin Weed, Wholeleaf Rosinweed - Silphium integrifolium](https://tnyards.utk.edu/wp-content/uploads/sites/170/2021/02/rosin_weed_wholeleaf_rosinweed_silphium_integrifolium_priaire_moon.jpg)
Common Name: Rosin Weed, Wholeleaf Rosinweed
Full sun, moderately wet to dry moisture level, adaptable to a wide range of soils including clay, neutral to slightly alkaline pH. 2-6 feet height, blooms summer into fall, yellow flowers, spreads by short rhizomes which enable the plant to form clumps but is not an aggressive spreader.
Germination Code: C(60)
Native Region: ?
This is a coarse, sunflower-like perennial that is easy to grow. Showy flowers. Matures more quickly than other members of this genus. Develops a taproot and division is not recommended. Adapts well to wildflower and native plant gardens. Attracts birds, butterflies and bees.
![Rosin Weed, Wholeleaf Rosinweed - Silphium integrifolium 2](https://tnyards.utk.edu/wp-content/uploads/sites/170/2021/02/rosin_weed_wholeleaf_rosinweed_silphium_integrifolium_2_john_hilty.jpg)
![Rosin Weed, Wholeleaf Rosinweed - Silphium integrifolium 3](https://tnyards.utk.edu/wp-content/uploads/sites/170/2021/02/rosin_weed_wholeleaf_rosinweed_silphium_integrifolium_2_priaire_moon.jpg)
![Rosin Weed, Wholeleaf Rosinweed - Silphium integrifolium 3](https://tnyards.utk.edu/wp-content/uploads/sites/170/2021/02/rosin_weed_wholeleaf_rosinweed_silphium_integrifolium_2_priaire_moon.jpg)