Re: Re: CULT: Growing Iris South Florida
iris@hort.net
  • Subject: Re: Re: CULT: Growing Iris South Florida
  • From: C* C* <d*@rewrite.hort.net>
  • Date: Sun, 9 Nov 2014 12:47:55 -0500
For information purposes. I have taken aphylla that went into dormancy and maintained them at temperatures above vernaliztion over winter indoors under lights. they remained dormant. In spring I planted them back outside. They remained dormant all summer and eventually died. 

Chuck Chapman

-----Original Message-----
From: Linda Mann <101l@rewrite.hort.net>
To: iris <iris@hort.net>
Sent: Sun, Nov 9, 2014 10:30 am
Subject: Re: [iris] Re: CULT: Growing Iris South Florida

Thanks for the clarification, Chuck.

So in this case, breeding for irises that would not require chilling
would make them maladaptive for everywhere else. And if they would grow 
anywhere else (i.e., with temperatures cool enough for vernalization in
winter), they wouldn't be adapted to south Florida.

From what I've read, stone fruit trees (cherries, apples, peaches etc)
that 'require' chilling in order to bloom and set fruit will eventually
break dormancy in a no-chill climate, so I don't see why irises
(especially some of the rebloomers) wouldn't be able to do the same.

The bigger issue seems like it would be disease tolerance in heat +
humidity, high rainfall.

I found a few articles online about breeding programs aimed at fruit
production in tropical climates - esp Brazil.  They now have produced
apples that require <100 hrs of chilling, some capable of producing more 
than one crop/year (i.e., reblooming apples ;-) )

Linda Mann




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