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Re: Re: HYB: Daylength independent

<<I'd like to get more information on these plants.>>

Chuck, I can give some random information, but my records have not all been that precise.? 

Wouldn't genes speak to capability and potential?? 

While modifiers would be triggered due to the size of rhizome, temperatures, fertilizer, & water?? 

-----Original Message-----
From: irischapman@aim.com
To: iris@hort.net
Sent: Thu, 21 Feb 2008 8:44 am
Subject: [iris] Re: HYB: Daylength independent

I'd like to get more information on these plants. I have most of them?
here and they have rebloomed for me, but never that early, usually in?
Are these newer clumps or older very crowded clumps??
When do they normally bloom in spring. Earlier then most TBs? When do?
SDB bloom for you.?
Do they get water during the hot periods or just before hot periods??
Do they get any stray light from other sources during what would?
normally be dark periods. From house window, street lights etc.?
My plants are field grown nd have absolutely no extra light of any?
Iris are classified as "long Daylight" bloomers. They have discovered?
that this is incorrect as plants should be classified according to how?
much darkness they get. So "Short Nights" is probably more correct?
terminology. Most plants that are controlled by photoperiod have very?
specific and precise photoperiods needed to trigger FBI (Flower bud?
initiation). Disruption of the night lighting by even a small amount?
can disrupt this sequence. Plant growers will delay Chrysanthemum?
bloom by turning lights on at night for one minute each night until?
they reach the time they want, usually in time to have plants in?
flower for Mother's day.?
Plants that have had flower bud differentiation ( July/August at?
40-50F) will still need to reach the appropriate biomass (rhizome size?
and number of leaves) as well as have the photoperiod trigger. If the?
rhizomes are crowded, and not up to size, then they will not bloom.?
Normally plants can turn off the bloom trigger if the plants are not?
up to size, but this could be one of the biological functions that are?
Most plants will produce a chemical to protect it from hot weather?
around 40C (105F) . Even so I have had good rebloom in my unheated?
green house, and about 3 weeks earlier then the same cultivar in the?
field. (No extra light). The plants in the greenhouse did get good?
watering so there wasnbt any water stress, or at least much less then?
the field plants.?
Give me more info and we will go from there.?
Chuck Chapman?
Date: Thu, 21 Feb 2008 07:44:06 -0500?
From: autmirislvr@aol.com?
Subject: Re: [iris] Re: HYB: Daylength independent?
In Kentucky, Immortality, Again & Again, Lunar Whitewash, Feed Back,?
Total Recall, Renown, and a few others, including but not limited to my?
own All Revved Up, have bloomed in July, August & Sept.? Around a dozen?
do so in my garden.? Another dozen if we count seedlings.??
Another very small group will occasionally rebloom in July if the temps?
are a bit cooler.??
I'd considered all of these daylight independent since shorter days are?
not required to trigger the bloom.??
In the Checklist, these are the irises that are listed (once widely?
distributed) to rebloom in zones 4 and above.? Previously called?
Everbloomers or Continuous bloomers.? They do neither, but CAN bloom at?
anytime, unlike the cylce rebloomers.??
Maybe "daylight independent" is not the correct term for what happens?
in my garden, but short days are not required to trigger this bloom.??
These two groups have figured more heavily in my breeding in the last?
two or three years.? I anxiously await bloom season.??
Regular rebloom, or cycle rebloomers, dependent on the cool period you?
mention, do not start rebloom before Sept. 15, or even Oct 1.??
Our?killing freeze will be mid-october till Christmas, with Oct being?
the norm.??
In all cases fertility and water are necessities.??
Although I bought a wide range of older rebloomers when I moved out?
here,?only a select few are being moved to the reorganized?beds. I make?
no attempt to grow all of anything.????
I do have a good collection of newer rebloomers,?especially the ones?
registered,?and hope to be able to report on them in the coming year.??
?Immortality can sit in my garden with mature size rhizomes and lots??
of leaves, but doesn't bloom until Mid to late August. This would??
suggest that it is not daylight independent.??
Betty Wilkerson/Bridge In Time/Zone 6/Dreaming of another good spring.??
"Only those who dare to dream can make a dream come true."??
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