CUP FLOWER
SILPHIUM PERFOLIATUM
Silphium perfoliatum
Genus: SILPHIUM
Protected Series:
Height: 5-6 Feet Tall
Spread: 2-3 Feet Wide
Color: yellow flower
Full Sun Plants
Full Sun Perennial Plants
Perennial
Zone: 3
#5936
native *
SILPHIUM PERFOLIATUM
Grower Notes:
Silphium perfoliatum is more commonly known as the Cup Plant. This coarse native perennial features large, yellow flowers with dark yellow center discs. It can grow to 5-6 feet tall with a spread of 2-3 feet. Foliage is green and uniquely cup shaped where the leaves meet the stem. The foliage cups hold water and attracts birds and other wildlife to the garden.
Cup Plants thrive in full sun in average, evenly moist, well-drained soils. They are perfect for the back of the border garden due to their height.
| AVAILABLE | SIZE | TYPE | GALENA | ADDITIONAL | DIG | SOON |
| SILPHIUM PERFOLIATUM | con 1 | 116 | 0 | 0 | 0 |
Any current Availability will be listed above this line. This item will not be in the cart if there is no Galena stock listed here.
Click for Availability column information and meaning
KEY:
con = containers - available now
Galena (Ready to Go!) Plants that are above ground and available now
Additional (More Plants!) Plants are not in Galena, but in a remote location which is easily accessible. Call your rep for info. They will not be in the Shop.
Dig (In-Ground Field) Plants are still in the ground. Please call your sales rep to place a Dig Order. They will not be in the Shop.
Soon (Coming Soon) Plants are not quite ready but coming soon. Call your rep to inquire. They will not be in the Shop.
(BBnPOT - formerly known as GRSTART - are B&B put into a container - they are available now)
Available cultivars in this genus: