Dahlia campanulata

hornig@usadatanet.net hornig@usadatanet.net
Sat, 22 Oct 2005 16:22:12 PDT
Can someone describe the conditions Dahlia campanulata needs to bloom?  I
was given seeds of this last year, and this year they germinated easily and
grew vigorously. Cuttings taken in midsummer rooted and transplanted
easily. So far, so good.  But what will it take to get them to bloom?

Ellen Hornig
Seneca Hill Perennials
Oswego NY USA (zone 5)

Original Message:
From: Don Mahoney dmahoney@sfbotanicalgarden.org
Date: Sat, 22 Oct 2005 15:39:19 -0700
To: pbs@lists.ibiblio.org
Subject: [pbs] Dahlia imperialis

Here at the botanical garden in San Francisco we have numerous clones of
Dahlia imperialis, most wild colllected from southern Mexico and Guatamala.
Some have flowers to 5 inches across. One clone blooms early (a few weeks
prior to Thanksgiving ) while most bloom closer to Christmas. They come
from white to pink to dark lavender and there are double and single forms
of most.  Some have reached to 18 feet tall.. When crossed they produce
lots of viable seed and some interesting (shorter, stockier) forms are
being developed. We also have two more everblooming species. Dahlia
tenuicaulis hails from Chiapas, Mexico and blooms May through February It
has two inch mid lavender flowers and only gets 8 to 10 feet tall. Dahlia
sp. nova has thin half inches stems and leans through other plants to 10
feet and blooms April to March with large 4 inch pink flowers that hang
downwards. It has smaller leaves. Some of the hybrids being developed seem
to be everblooming.
 Don Mahoney San Francisco Bot garden at Strybing Arboretum
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