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Rudbeckia maxima

Rudbeckia maxima
giant coneflower
Rudbeckia maxima

Common name giant coneflower
Family asteraceae
Life cycle perennial
Flowers yellow (early summer)
Size 6'
Light full sun
Cultural notes ordinary garden soil
From seed germinate at room temperature
detailed seed-starting info below
Seed ripensearly October

This yellow coneflower grows from a rosette of large bluish-green leaves. In late spring, it sends up a sturdy, tall stalk with, way at the top, flowers whose most prominent feature is the dark central conical disk, which juts out further than on most other coneflowers.

giant coneflower
Leaves clasp the stem in an elegant way

We left this plant behind in our Pennsylvania garden (and wish it well); we don't grow it in Houston.

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Seed-starting details for this plant

  1. Seed from '02 trade. Baggy 70F (50%G, 5-16d)
  2. Seed from '04 garden. Baggy 70F (5%G, 7d). Apparently most of the seeds I collected were duds. Will look harder at the seedheads next year
  3. Seed from '06 garden. Lots of seeds to a pot at 70F. 1 germinated, in 7d

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