Re: REB: fall cycle vs other

Hmm.. so what happens with an iris that has all three genes?
Could IMM be a "whenever" but her somewhat fussy growth habits maybe prevent her from reblooming all summer here? She seems to manage it under ideal growing conditions.
Casual observation is that bloom starts in late summer/early fall for most "summer" bloomers here about 6 weeks after a few cool nights (lows in the 40s & 50s). So is that vernalization? Or just the optimal temperature for bloom bud set, as in ARCTIC FOX? Imm and BELVI QUEEN
Rats, adding CA direct/whenever (=fast grower) (whichever they have) rebloom genes to the fussy grower genes in IMM won't help a bit here. Seems like it would be really difficult in a long growing season location with rare July rebloom (i.e., here) and less than ideal growing conditions to be able to sort out the difference between "direct" and "whenever". 

<For Direct, or summer rebloomers, they go directly from flower bud set to
bloom. No further triggers needed.
Going directly from initial trigger to bloom , this seems to be about 3 weeks 
in cold climate and probably about 2 weeks
in warm climate.
For fall cyclic rebloomers, they sit and wait until nights are long enough to 
trigger bloom. they don't need
vernalization.
'Whenever' rebloomers don't seem to need the warm period to have flower bud
set. They seem to set flower bud
 as soon as plant reaches maturity. Vernalization is carried forward in
increases by fast growth on the  increases bypassing
normal vernalization reset from apical dominance. Thus if the increases grow
too slow in spring, they will have vernaliation state reset,
and will not be able to "whenever" rebloom

Chuck Chapman>

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