When plants bloom

Tim Harvey zigur@hotmail.com
Thu, 07 Jun 2007 00:09:38 PDT
Most section Horaea Pelargonium bloom as their leaves are fading at the end 
of the growing season.


>From: Mary Sue Ittner <msittner@mcn.org>
>Reply-To: Pacific Bulb Society <pbs@lists.ibiblio.org>
>To: pbs@lists.ibiblio.org
>Subject: [pbs] When plants bloom
>Date: Wed, 06 Jun 2007 20:51:26 -0700
>I know lots of exceptions to Jim McKenney's remark that "Most plants bloom
>at the beginning of the growing season, and their developing seeds have the
>advantage of clement conditions. " How can you assume that the best
>conditions for developing seeds is in the beginning?  Climates around the
>world are so varied. There are Amaryllid species in the winter rainfall of
>South Africa that bloom before their leaves or with their leaves which
>works as the seeds start to grow right away and need the winter rain to
>keep them going. But some seeds need a long dry period to season or would
>rot if they were formed during the wettest time of their growth period. And
>there might not be any pollinators about in that kind of weather either. In
>California, a lot of the native bulbs I grow bloom after their leaves have
>withered when there is a better chance for them to be pollinated and when
>the seeds won't be ruined by the weather. There are winter rainfall South
>African Irids I grow that bloom at the start of the growing season, in the
>middle, and in the end. Most of the ones I grow show up from September to
>October. Some bloom before their leaves, but most of them don't start
>blooming until February or March. Others bloom in April. Many Tritonia and
>Ixia species aren't in bloom until May and there are Gladiolus species just
>opening now. Where I live most native plants don't bloom at the beginning
>of the growing season. The peak wildflower season here is late April to May
>extending to June some years if there are late rains. But if you count the
>growing season as starting with the first rains, that would be late fall,
>and there are very few native plants that are in bloom then. Maybe this is
>just typical of a Mediterranean climate and Jim's rule applies to other
>climates. How about some of the rest of you around the world? When in their
>growing season do plants bloom where you live?
>Mary Sue
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