Silphium perfoliatum ‘The Holy Grail’
Silphium perfoliatum 'The Holy Grail' is a dramatic cup plant due to its height, chartreuse foliage and bright yellow daisies.
Silphium perfoliatum is known as the cup plant due to its large, triangular, toothed leaves that clasp the stem and catch rain water. It can reach dramatic heights up to 6-8 feet tall with a 3 foot spread. Bright yellow, daisy-like, nectar-rich flowers bloom in summer. Birds and insects use the collected water for a source of drinking water plus birds will eat the seeds. ‘The Holy Grail’ is a special selection with lime green to gold foliage. Grow in rich, well-drained soil. Use as a focal point at the back of the sunny border or in the cottage garden for vertical and wow appeal. Pollinator attractor.
Common Name: Cup Plant
Family: Asteraceae (The Aster/Daisy Family)
Zone Hardiness: 4-9
Light: Full Sun
Height: 4-6'
Width: 2-3'
Primary Bloom Colour: Yellow
Secondary Bloom Colour: Yellow
Class: Deciduous
Type: Perennial
Bloom Time: Summer
Soil Moisture: Average, Moist
Stem Colour:
Fragrance: No
Berries:
Benefits: Bees Butterflies
Deer Resistant: Unknown
BC Native: No
Native Habitat: Sandy moist bottom lands, floodplains, ditches, near streams and in open woodlands, forest edges, and fields in Ontario and Quebec and across much of the central and eastern US.
Award:
Geographical Origin:
