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Re: Re: HYB: Daylength independent

See comments below.   --  Griff

----- Original Message ----- From: <irischapman@aim.com>
To: <iris@hort.net>
Sent: Saturday, March 01, 2008 12:41 AM
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

Chuck -- SDBs start blooming about the first week of April here. TBs begin around the last week of April and peak about mid-May. (Depending on weather, these timeframes can vary by 10 days or so.)

Last year, we had the following temperatures (no figures for July and September):

Month Avg high Highest Avg low Rainfall (in inches)

May 77.3 91 57.8 1.75

June 85 96 67.2 1.49

August 88.3 102 71.1 3.47

October 76.4 92 57.7 6.5

May was warmer, and October much warmer, than usual. Otherwise, the temperatures were fairly normal for here. We were, however, in an extreme drought until late in the year. Evaporation rate for each of the listed months was 99999.99! As a result, only two irises, ETERNAL BLISS and Sdlg. 04R3, rebloomed here last fall, versus the 24 that rebloomed in 2006. ZURICH put up a stalk, but was frozen in the bud. Nonetheless, four seedlings achieved maiden bloom either in the garden (end of October) or cut and brought inside before the freeze, to flower in November or December. The only other rebloomer during the year was CHAMPAGNE ELEGANCE, under its oak tree, in the third week of June.

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