[pbs] Topic of the week: Dahlia species and related Genera
John Bryan
johnbryan at worldnet.att.net
Mon Jul 14 12:22:12 EDT 2003
Hi All:
Dahlia imperalis grows to a height of some 25 feet here in Sausalito,
California, flowering in November. The flowers are mostly pendant, quite
long lasting. Stems reach 3-4 inches in diameter. Cheers, John E. Bryan
Robert Hamilton wrote:
>
> Hi Uli ,
>
> Thanks for the introduction.
>
> I am very fond of "Tree Dahlias" which to me means the single
> pink form of Dahlia imperialis which is grown commonly in gardens
> where I live. It grows to about 3 metres and flowers in early
> winter before heavy frost and tends to be quite an open leggy
> plant. I also grow a semi double white form which is not so tall
> - about 2 metres and a much more dense clump - to my eye a much
> better garden plant . Unfortunately it flowers several weeks
> later than the single pink and therefore is not often enjoyed.
> This year our winter was quite mild until June 21 (our
> shortest day) and I had a nice display of flowers almost ready
> to photograph. We then had -2C and -1C two nights in a row .
> Next weekend I cut them all down (saving plenty of cuttings.)
>
> I grow them in full sun and wind in our new garden hoping that in
> years to come as trees and shrubs grow they will get more
> protection from frost.
>
> I also grow Dahlia coccinea var palmeri thanks to Uli and find it
> flowers almost continuously from summer to frost. For me thus
> far it has only reached 1 metre tall and is also a wonderful
> garden plant.
>
> I have raised 4 seedlings of Dahlia merkii this year so should
> be able to share my experiences with this next summer.
>
> Cheers,
>
> Rob in Tasmania
> Zone 9
>
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