RE: RE: What is rebloom, revisited


My understanding is that the primary requirement for rebloom is that the
growth rate of the iris be fast enough to produce 2 bloom cycles from a
single parent rhizome in a single year.  If a single clump fails to bloom
twice in a year, I wouldn't call it "real" rebloom.  However, if a parent
rhizome produced 2 spurts of  increase which bloomed in two phases separated
by two months or more, I'd call it rebloom.  Occasionally a rhizome will put
up more than one stalk, but this usually happens concurrently.  Some
cultivars are particularly prone to this; most often it is not particularly
attractive.  Once the rhizome is finished, it's finished (of course, there
is always some mutant exception, as in some pineappled rhizomes that keep
putting out distorted stalklets because they seem to have forgotten how to
use their energy for increase).

John Reeds, in sunny southern Calif. where the iris are 97% finished
jreeds@microsensors.com

> From: 	Laurie[SMTP:laurief@paulbunyan.net]
> 
> Two rhizomes of the same reblooming cultivar planted in different parts 
> of the garden in summer 1999.  Spring 2000, rz #1 blooms but #2 does not. 
> Fall 2000, rz #2 blooms, but #1 does not. Both rzs increase well.
> 
> 1.  Can this be counted as 2000 rebloom if the rz that bloomed in the 
> fall failed to bloom in the spring, even though it was the same cv 
> planted at the same time (and acquired at the same time from the same 
> source) as the other rz that DID bloom that same spring in that same 
> garden?
> 
> 2.  I know that each individual spring-blooming rz blooms only once 
> during its lifetime before turning its energy (hopefully) to growing 
> increases, but does the same hold true for individual reblooming rzs?  
> Does the *same* reblooming rz bloom more than once, or is it the 
> increases that provide the rebloom?  If it is the increase (rather than 
> the original rz) that provides the rebloom, wouldn't that lend 
> credibility to the designation of the above scenario as legitimate 
> rebloom, regardless of the fact that the two rzs were planted in separate 
> parts of the same garden?
> 
> Laurie
> zone 3b northern MN
> 

 

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