Cupplant

Silphium perfoliatum

Cup Plant is one of the best wildflowers for attracting birds - offering food, water and cover. A magnificent native perennial that can easily reach 10 feet tall, Silphium perfoliatum is excellent in the back of the border garden, filling up a sunny corner …

More Detail
In stock
SKU
38460-03 / 18460
Plants 3" Pots
1-4 $5.99 ea.
5-10 $4.99 ea.
11-31 $3.99 ea.
32+ $2.99 ea.
Seeds 1,400 seeds/oz
1/4 Oz $8.00
1/2 Oz $12.00
Oz $20.00
Lb $300.00
Cultural Details
Soil Type Clay, Loam, Sand
Soil Moisture Medium, Moist, Wet
Sun Exposure Full Sun, Partial
Height 5' - 10'
Bloom Color Yellow
Bloom Time July, Aug, Sep
Spacing 4'
Zones 3, 4, 5, 6, 7, 8
Root Type Fibrous
Benefits Birds, Butterflies, Pollinators, Hummingbirds
Seeds per Oz 1400
Propagation Treatment Moist Stratification
Days to Moist Stratify 30 days
Direct Sowing Time Fall

Cup Plant is one of the best wildflowers for attracting birds - offering food, water and cover. A magnificent native perennial that can easily reach 10 feet tall, Silphium perfoliatum is excellent in the back of the border garden, filling up a sunny corner of the yard, or along a fence for privacy. A riot of bright yellow flowers, 2 – 3 inches across, bloom in late summer to support an array of pollinators. As the name implies, the clasping leaves form “cups” along the strong square stem that catch rainwater. In fall, Goldfinches descend upon the plants to devour the seeds.