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Ten Petaled Sunflower

Helianthus decapetalus

The Ten-Petaled Sunflower is related to the common Annual Sunflower, but unlike its botanical cousin it thrives in dappled shade, grows shorter, and produces multiple flowerheads year after year. Its 3-inch wide yellow flowers, which bloom in late summer, attract a variety of insects. The leaves also feed many insect species, including painted lady caterpillars. Even after the flowers and foliage fade in the winter, Ten-Petaled Sunflower seeds are a valuable food source for birds. In ideal conditions, it can be aggressive, but periodic division can control its spread. In shady or high-fertility gardens, it may flop. Cut the plant back in early summer to prevent this.

Details

Height36” - 60”
Spread24"
Bloom SeasonJuly – September
Soil Types
loamLoam
sandSand
Soil Moisture
dryDry
mediumMedium
moistMoist
Sun Exposure
partSunPart Sun
fullSunFull Sun

Range Map

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Ecological Benefits

Maintenance Tips

  • Mature plants can be divided to control size and spread
  • If height is a concern, you can cut stems of well established plants roughly in half in early summer to reduce overall height while improving bushiness

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