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HYB: germination experiments

  • Subject: HYB: germination experiments
  • From: Linda Mann lmann@volfirst.net
  • Date: Fri, 13 Dec 2002 16:59:45 -0500

Germination seems to have slowed way down on the non-presoaked 2 and 3
month stratified seeds (2 month batch was planted mid-Sept, 3 month
batch Oct 22).  So I separated the individual cells containing baby
plants from the 4-cell paks and moved the cells with baby plants from
the 'sun' porch outdoors into the coldframe.

The cell paks with ungerminated seed will stay on the sun porch till
spring, just in case a few more decide to germinate this year.  I
consolidated them to maximize concentration of whatever gases they are
producing & added a fresh supply of ripening fruit - this time d'Anjou

Some of both batches continue to germinate.  No wonder I've had such
poor germination in outdoor containers - no way previous seed plantings
were staying this moist and cool for such a long period of time.

It has been easy to keep the sun room temperature between 40 and 60oF by
opening or closing the door to the rest of the house.  If any of these
crosses need wide differences in alternating warming and cooling to
trigger germination, they aren't getting it.

While moving them, I checked outdoor soil temperatures.  Inside the cold
frame, it was a toasty 50oF, outside it was slightly below 40.  The baby
seedlings that germinated early and have been in the cold frame for a
few months look great.  They have sailed thru outdoor temperatures as
low as 20oF without any apparent damage.

I chose this week to move them outdoors because even tho it is dreary
raining/snowing/wretched weather, nighttime temperatures aren't too bad
for several days in a row, so hopefully won't shock them too much.

Seedlings moved into the coldframe mostly had 3 leaves and were about an
inch tall, both in this batch and the earlier ones.  The earlier batch
has grown a little, but not much.  Hopefully, they will be ready to
launch into rapid growth in early spring, 10oF earlier than exposed
plants.  That should be equivalent to about a month's headstart, not
counting the growth they have already made.

The rest of the seeds from these crosses have finished the toilet tank
soak and are in the fridge for three months.  The three months will be
up ~ Mar 1.  By that time, the cold frame seedlings should already be
actively growing.

Peak TB bloom here is about the first week of May.

Linda Mann east Tennessee USA zone 7/8

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