I have grown tomato seedlings for years, and having the light too close
is never an issue. When the leaves touch the fluorescent bulbs I raise
the bulbs just enough so they do not touch (1/4"). The lights also run
16 hours a day. A small fan keeps the air moving, which moves the
seedlings, which inspires strong stocky stems.
Having the lights too far away gets you spindly stems, as the seedlings
reach for the weak fluorescent light..
Transplanting tomatoes into too cool outdoor soil can set them back as
you indicated.
If it's not a disease I would tend to think too
much light or the light source too close. I had some tomato
seedlings I started one year and kept the light too close the them.
The leaves got darker and darker on them almost to the point of looking
black until I planted them. They never died, but they took about 2
months to recover and start growing normally.
-----Original Message-----
From: Martha Barrett / Scott Weber [mailto:bluestem_farm@juno.com]
Sent: Tuesday, March 02, 2004 12:59 PM
To: nafex@lists.ibiblio.org
Subject: Re: [NAFEX] Pear seedling problems
Hi,
I'll jump in with my two cents' worth, and suggest that maybe
the air is
too humid (although I realize that inside in the winter,
that seems
unlikely). It the plant isn't transpiring, it isn't
able to bring
nutrients up from its roots and will die of
malnutrition. Maybe next
time you can start them when the season
warms and grow them in a
sheltered spot outside?
Muffy Barrett
On Sun, 29 Feb 2004 21:18:21 -0600 "Dean Kreutzer" writes:
>
8d2db1a474b454fd9dd499f431ddf465d44005c494f4f4b504a5cd10a5cd2990909064ad207020c174d9b5a1d985c180f0bd79d9d995914dd9bdbdad511090815964d5a5a570b4e0a090d4c94089ed40193089305d5d41555538195411348511d9713471c1c1041414805d
>
>>It sure sounds like fire blight. Perhaps you planted
your seeds in
>>contaminated soil, else it may be some
kind of mineral deficiency if
>>you planted in sterile potting
soil.
>
>I used a peat/perlite mix.
>
>>Also are they warm enough?
>
>About 70F, which
may not be warm enough. Humidity 25%-30%.
>
>>Does
your water have excess minerals (dog urinates on seedlings? ;-)?
>
>I use rainwater that I collected last fall.
>
>>Tiny insects such as spider mites?
>
>Nope, I
checked that out right away.
>
>I really appreciate your
thoughts, just nothing seems to stand out. I
>
>thought it may be fireblight, but I would find that odd as there
isn't
>any
>fireblight in the orchard where I did the
crosses.
>
>Thanks again,
>
>Dean Kreutzer
>Regina, Saskatchewan Canada
>USDA zone 3
>
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