Re: Re: REB: fall cycle vs other

<<Betty, Did you get summer rebloomers from crosses of summer rebloomers with
sporatic rebloomers?>>

Chuck, most of my rebloomers are fall cycle.  However, I have five that often
bloom in the summer--some are really hard to explain.

SUMMER RADIANCE--mentioned before. I don't think this one is a the same as the
others. It appears to be both a repeat & a cycle rebloomer. From (Lemon
Reflection X Hindenburg.)  I've bloomed cycle rebloomers from SR but no
summer/whenever.

RETURNING CHAMELEON--It has bloomed July-late frost either in my grarden or in
the display garden in Bowling Green KY.  This year it has bloomed in August,
Sept, Oct & Nov.  (PINK SLEIGH X IMMORTALITY)  (this probably qualifies as
Sporadic x Summer)

STAR GATE--Has not summer bloomed in my garden but has been reported to do so
in Kansas & VA. Early for Linda in TN but I don't remember just when.  (Feed
Back x Violet Miracle) (SG is present in several of my summer blooming
seedlings)

ALL REVVED UP--This one has bloomed every month from June thru frost in my
gardens.  Not every year.  Was reported to do the same in another Zone 6
garden last year. (Innocent Star x Radiant Bliss)  Radiant Bliss is Earl of
Essex X Hot Streak.  ARU has produce several that summer bloom when crossed
onto Blatant.  Two of these have bloomed in July & are keepers at this point.
Eleven, total, have rebloomed.  One has bloomed two separate years in July.
Radiant Bliss is fall cycle for me.  Not sure what Innocent Star is.

ECHO LOCATION-August to frost here.  Has bloomed at least that early if not a
little earlier in a couple of other gardens.  (Innocent Star x Rebound)
Rebound is Highland Chief x Earl of Essex.  Crossed onto Again & Again (2130),
I've had one bloom in August.  Remember this cross was planted in 2007 so
anything is still possible.

There is another that may summer rebloom but information is still sketchy.
It's a child of Love Lines which has put up it's first fall stalk in a VA
garden.  Guess this would be sporadic.  It's only been a cycle rebloomer for
me, but it's still quite young.

Lots of summer blooming seedlings  . . . Immortality, Feed Back & Star Gate in
most of them.

Betty Wilkerson
Bridge In Time Gardens
KY zone 6

-----Original Message-----
From: irischapman@aim.com
To: iris@hort.net
Sent: Wed, Nov 11, 2009 7:53 pm
Subject: [iris] Re: REB: fall cycle vs other



 Artic Fox is a oncer. Occasional and rare reports of rebloom will not change
hat.
What Richard did to determine if bud set had occurred, is cut he leaves off
ntil he had a clear look at
pical meristem. This is standard proceedure in this type of study. If anyone
as the reproducton of the early AIS bulletins, check Jan 1923. That is
orrect, January nineteen twenty three. Issue #7, part 2. Article by Marion
hull pg 17-19. A good explination of this proceedure, and good drawings of an
nitial flower bud.  I have scanned these and could post to Iris photos if
eople wish to look at it and don't have their own copy
Oncers and fall cyclic cultivars  need the further flower initiation
rigger(s) to develop flower stalk.
irect rebloomers (summer rebloomers)  develop flower stalk as soon as flower
ud is set. No rest, no delay. And it does not mattter what temperature is
fter the bloom initiation. It is an on switch, and a go.
Whenever Rebloomers don't need the same flower bud tigger. That is they don't
eed the 6 days of temperature between 16 and 21 C  to have bud set, They set
lower buds as soon as fan is mature.
As long as proper conditions occur, for summer rebloomers, that is each fan
as
t  reaches maturity and it  gets the temperature conditions, it  will produce
 flower stalk.  If min temperature isn't reached, ie too hot or too cold,
hen the new mature fans will not set flower bud and will not bloom. Thus in
limates where they get these temperatures through summer the direct bloomers
ill continue. Each fan being induced as it reaches maturity and has
emperature trigger.   But, and the big but, is that they won't bloom until
hey have the key temperature.  Thus the delay to start rebolom. And if  min
emeratures  is not in target range, rebloom stops. thus in warm climates. An
arly rebloom , and then nothing for  awhile, until temperature trigger
ccurs.
Whenever rebloomers, don't need these temperature conditions. And can start
ebloom a week after they have finished spring bloom. And will put up further
ebloom, regardless of having or not having triggering temperature range. They
on't need this trigger temperature.
Last year, I followed Immortality and Queen Dorothy through season ,after
pring bloom. we had a warm summer, so good growth.  I took repeated photos of
ans of each. The mature fans just sat there, doing nothing, for about 4-5
eeks. As soon as I got triggering temperatures, they proceeded to develop
lower stalks and increases started to grow. the photo documentation is in
pring Rebloomer article.  Thus bloom in mid August. The whenever rebloomers
ad been blooming since end of June, when TBs were just finishing blooming.
Crosses of Immortality and Forever Blue produced a lot of ugly oncers. As did
ll sorts of other crosses of FB with  Summer Rebloomers. Thus differerent
enetics. Thus the search for and explination of what is going on.
A plant that has direct blooming genes and fall cyclic rebloom  genes will
erform as a direct bloomer.
A plant with whenever  genes and summer  genes will perform as a whenever
ebloomer. etc, etc. What  genes are there that trigger bloom first will do
o. the other genes are then irrelevant, and may as not as well be there ( A
eduction, not experimental data)
Betty, Did you get summer rebloomers from crosses of summer rebloomers with
poratic rebloomers?
Chuck Chapman
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