Plant, Tree & Shrub Library

Buttercup Bush

Senna multiglandulosa

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Buttercup Bush (Senna multiglandulosa) at Bachman's Landscaping

Buttercup Bush flowers

Buttercup Bush flowers

(Photo courtesy of NetPS Plant Finder)

Height:  12 feet

Spread:  10 feet

Sunlight:  full sun 

Hardiness Zone:  (annual)

Other Names:  Downy Senna, Cassia tomentosa


A medium sized airy shrub or tree with small oval, fuzzy compound leaves, covered with large golden-yellow flowers in mid-winter; excellent as a loose screen or tall border planting; can be invasive

Ornamental Features

Buttercup Bush features showy clusters of gold star-shaped flowers at the ends of the branches in early fall. Its attractive tomentose oval compound leaves remain dark green in color throughout the season. The fruits are showy green pods displayed in mid spring.

Landscape Attributes

Buttercup Bush is an open multi-stemmed annual with an upright spreading habit of growth. Its medium texture blends into the garden, but can always be balanced by a couple of finer or coarser plants for an effective composition.

This plant will require occasional maintenance and upkeep, and should only be pruned after flowering to avoid removing any of the current season's flowers. It is a good choice for attracting birds to your yard. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;

  • Suckering
  • Invasive

Buttercup Bush is recommended for the following landscape applications;

  • Mass Planting
  • Hedges/Screening
  • General Garden Use

Planting & Growing

Buttercup Bush will grow to be about 12 feet tall at maturity, with a spread of 10 feet. Although it's not a true annual, this fast-growing plant can be expected to behave as an annual in our climate if left outdoors over the winter, usually needing replacement the following year. As such, gardeners should take into consideration that it will perform differently than it would in its native habitat.

This plant should only be grown in full sunlight. It is very adaptable to both dry and moist locations, and should do just fine under typical garden conditions. It is not particular as to soil type or pH. It is somewhat tolerant of urban pollution. This species is not originally from North America.

Hardiness Zone Plant Height Minimum Sunlight
Massing  Screening  Garden 
Flowers  Fruit  Foliage Color  Winter Value  Attracts Wildlife 
Ornamental Features