Re: Re: HYB: rebloom breeding
iris@hort.net
  • Subject: Re: Re: HYB: rebloom breeding
  • From: C* C* <d*@rewrite.hort.net>
  • Date: Mon, 1 Dec 2014 14:12:18 -0500
After trigger is set, they can bloom in June or July etc in zone 9 or 10. But don't do this other zones. A carry through from triggering and vernalization epigentic set.
So if you don't have environment for this you won't get this type of rebloom. Involves blooming in March, so then can have mature plants about May and temperatures for bud set followed by five months of growth, takes you into November. Then plants primed and wait for growing conditions. If none then they are in eco-dormancy waiting for growth conditions. So need frost free growing conditions from about early March to mid to late November. Of course a colder area can receive one of these primed plants and get June, July or Aug (etc) rebloom the first year but never again. One of the reasons I don't report one-off rebloom. Never know where trigger came from. Gives data that is completely unreliable and deceptive. When looking through rebloom checklist I see plants recorded often in zones 9, 10 and once in a zone 6 or 7. Probably zone 6 or 7 rebloom from a carry over from origin of plant. So probably more then 40% of Preferential vernalization rebloomers on checklist.
Plants with this type of rebloom are Mediterranean plants that haven't needed to develop genes to deal with cold weather. So will not carry genes for dealing with cold weather unless they have accidentally picked them up along the way. 


Chuck Chapman



-----Original Message-----
From: Linda Mann <101l@rewrite.hort.net>
To: iris <iris@hort.net>
Sent: Mon, Dec 1, 2014 1:25 pm
Subject: Re: [iris] Re:  HYB: rebloom breeding

Sure would be nice to know how many of those are reblooming 5 months
after main bloom season and how many are reblooming earlier.

If they bloom in June or July in CA/Oz, do you think they are
preferential or recessive 'summer'?

Stanton sent me his rebloom records a few years ago - there were only a
few that were blooming in July/Aug, as I recall.

On 12/1/2014 11:02 AM, Chuck Chapman wrote:
I took a quick look at 2008 checklist. I took samples of how many 
plants

are listed for  zone 9 or 10  only rebloom. About 33-40% of all of the
3388  iris listed.

Those that rebloom only in zones 9 and 10 are the preferential
vernalization types (aka California rebloomers if you prefer that 
term)

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