Re: Summer Rebloom Triggers
An update on observations.
I noted the start of rebloom stalks on queen Dorothy after three nights
of minimum temperature above 15C. No response from Immortality. Queen
Dorothy has been in bloom here for a week or so.
About 10 ago we had the 6th night in a row of minimum temperature
above 15C. Y have ben taking photos of Immortality in three different
locations every couple of days. Two days ago Immortality showed
pregnancy hook and today showed peak of bud emerging.
After monitoring the relationship between temperature and rebloom last
year it seemed to me that there was a definite correlation. Fo some
time there were enough nature leaves in both clumps of QD an Imm to
support rebloom. They both needed their trigger. For QD it seems as if
3 nights above 15C and for Imm 5-6 days.
What seems to be happening is the onset of flower bud differentiation,
which for summer rebloomers then proceeds directly to flower stalk
WITHOUT need for vernalization., or daylight specific triggers.
Also observed, at the same time flower bud differentiation occurs
seems to also be trigger for daughter rhizome start. I'm speaking of
how new daughters shout up between mature leaves on plant. This was
observed on QD at time of flower stalk initiation and I'm now seeing
this on various plants throughout the garden.. This is on all types,
SDB, TB, IB etc. It wasn't seen several weeks ago.
This may also explain why TB's don't do well in colder climates. There
may not be sufficient warm nights to trigger flower bud and daughter
plants.
Chuck Chapman
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