Re: HYB: older seedlings, rebloom
One area of research that you could help with, is "What are the
biological triggers for rebloom on Immortality" This would appear to
relate to how summer bloomers like Immortality is different from fall
cyclic bloomers and from Daylight Independent rebloomers like Forever
Blue and children.
For me , I have noted that summer bloom on Immortality would seem to
occur 14 days +/- (time from flowering initiation to bloomstalks
maturity)from time minimum night temperature goes above 13c ( +/- 3C)(
55F +/- 5F) for several days in a row. No night light. So there are a
few tests that can be done, and a few measurement can be taken. This is
referred to fact finding, which is a preliminary to actually doing
research. Seeking out or narrowing of hypothesis.
1) Covering up one or several clumps of Immortality at night to reduce
night light effects. A bucket, 5 gal pail or garbage bucket would
work. Then compare rebloom with clumps exposed to extended lights.
Security light or a supplemental light., or both.
2) Keep track of number of mature leaves on rhizomes in clump. Maturity
is suppose to be around 6-7 mature leaves. Does Immortality rebloom 14
+/- after maturity, or does it sit for awhile waiting fr some other
signal. For me it appears to sit around waiting for another signal,
seemingly increase in min night temperature.
3) keep track of Min/max temp at you own garden with a min/max
thermometer. Keep daily records.
I suspect Immortality goes into heat dormancy when Max temp goes above
about 102F. (+/- 3F) (probably after 2-3 days of this high temp) So
min/max would also give us that information. It could be a stop in
bloomstalk production, but more likely a halt in growth. So we could
possibly see a starting bloomstalk that stops growing until
temperatures cool down.
Fertilizing and water would certainly have an effect on growth, but the
best method of measuring this would be number of mature leaves on
plant. This also takes into consideration of growth rate with ambient
temperature and amount of light. All of that are difficult to measure,
and indirectly related to bloom, except through plant maturity, of
which leaf count is best measure.
Then of courses is the seedling information. Fall cyclic X fall cyclic
, what number and type of seedlings. Relationship of plant vigour and
speed of maturity of rhizome, corelated with rebloom.
Same with Summer rebloomers X summer rebloomers
and Summer rebloomers X Fall cyclic rebloomers.
Of course there are also many other experiments, but these would seem
to be the easiest to get data on in home garden.
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We need some guide lines for collecting empirical data.?
What about variables?? Unlike a lab, it would be impossible to
standardize the various gardens.? As the crow flies, I'm five miles or
so from my Alvaton garden. (1980's & early 1990's) and I've several
irises that grew there but don't here and the reverse.?
Currently, I'm in farm country.? My garden is a?former pasture, a wide
open field with a southern slope.??Tilted just slightly to the west.?
No trees or shade of any type.? I'm on a creek bank, in fact, I'm in a
loop of the creek.? I get a lot of fog and dew.?? We know I have a
I can record fertilizer etc.. but only in general terms as hand
application is variable.? Can record timing sequence on soaker hoses
I keep a garden journal with the high/low temps given by our local (20
miles) weather station, and a rough estimate of rainfall.? The temps
are a degree or two off at times given the difference is local.??
Clearly, the types of rebloomers used would factor into the situation,
with good hybridizing records.?
Is it doable?? Would people be interested in contributing??
<<So far we have a lot of theories,
next step is to get some imperical evidence, and put theories to test.>>
Betty W/KY/Zone 6.?
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