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Re: Re: HYB: Daylength independent

Morning all. This has been a very interesting discussion. When the talk started mentioning street lights or yard security lights, I had to add in my observations.

I've lived in the country since 1992. At my old place, the yard light was on the east side of the house, almost directly over my rock garden. I sometimes wondered if all those dwarf iris bloomed earlier because of 24 hrs of light during spring. I had no rebloomers though until 1997, when I got Forever Blue from Chuck, which I planted at the back of the house, in my nursery bed on the west side. No extra light reached that area. FB rebloomed in 1999, which I thought was just a fluke at the time. It's rebloomed though every year since.

I moved to my existing place in July of 1999. Again, the yard light is on the east side, right beside 2 very large beds with lots of different iris, some potential rebloomers, plus about a 30 ft span of just Chuck's iris. As mentioned in post 'Hyb Rebloomers Canada 2007', Forever Blue, Wizard of Hope and Blueberry Tart rebloom in that area, as does Autumn Jester, just a little further away from the yard light. However, Forever Blue, Wizard of Hope also rebloom on the west side of the house, well out of the light cast by the yard light. This is also the same spot that both MDB Ditto and Bee Wings rebloomed several years ago during a cold rainy spring, as did MDB Velvet Toy this year, all near the end of Sept. These 3 MDB's are also planted closer to the yard light and never rebloomed in that location, even though all the clumps are about the same age.

In any case, whenever Chuck introduces an iris that reblooms, you can be sure I'll try it. :)

El, near Winnipeg, Manitoba, Canada Z3
MIS, DIS & HIPS Display Garden

----- Original Message ----- From: <irischapman@aim.com>
To: <iris@hort.net>
Sent: Friday, February 29, 2008 11:41 PM
Subject: [iris] Re: HYB: Daylength independent

Thanks for the information Griff.

When is your spring bloom?
Is there any possibility of plant heat dormancy in some of ther plants? What sort of temperatures do you get day and night in summer and in October?

Chuck Chapman

Date: Thu, 28 Feb 2008 16:04:33 -0500
From: "J. Griffin Crump" <jgcrump@cox.net>
Subject: Re: [iris] Re:  HYB: Daylength independent

See my comments below, please.  --  Griff

- ----- Original Message -----
From: <irischapman@aim.com>
To: <iris@hort.net>
Sent: Monday, February 25, 2008 5:40 PM
Subject: [iris] Re: HYB: Daylength independent

I have read another account of early summer bloom in some plants,
including Immortality, Queen Dorothy and Baby Blessed . Rebloomn
in June and continuing to Fall. Plants were in an area where they got
light all night from a security light. It makes me wonder about all
other reports of  June/July rebloom. What were the lighting

All three of these cultivars are, or were, in my front garden.  I recall
that, in QUEEN DOROTHY's first year here, it bloomed in spring, again in
July, then 3 more times until late fall.  It has not repeated that
performance. In fact, it seldom reblooms at all, despite having been moved in the garden more than once. The only major difference in conditions from then until now is that the county several years ago installed a streetlight,
over my objections, about 50 yards down the street, so that the garden no
longer is in full darkness at night.  Might that have an effect?  I do not
know.  BABY BLESSED rebloomed in most years, but IMMORTALITY does not
rebloom here.

Here's another puzzler: HAUNTING reblooms reliably at Halloween here (zone
7a), and does the same at Winterberry Gardens (zone 6b), despite the fact
that Winterberry's elevation is 1,000 feet higher than mine and its peak
spring bloom is 2 weeks later than mine. We are at the same latitude. This
would seem to indicate that temperature is not the deciding factor as far as
HAUNTING is concerned.


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