Hello All!

I come to you with an urgent cry for help. Last week, I
transplanted my three week old tomato seedlings into larger pots. I fertilized
them with a half strength fertilizer, and now some of them are falling ill!

I have been starting tomatoes for a few years now, and I am
stumped. I have no idea what went wrong.

Here is some info about how they are being grown.

Soil substrate: Coir seed starting mix (Burpee Brand mixed
with coir from a compressed block)

Temperature: 70-75'

Location: East Facing Window (Under florescent bulbs)

When I transplanted them last week, that was the last time
they were watered. They are usually only watered once a week. It seems random
the ones that are affected. I am not seeing a correlation between varieties,
old or new cups, or which lights they are under. Most have a dry soil surface
but some have slight moisture (both dry and moist ones are affected). There is
no evidence of spider mites or fungus gnats.

The intense purple would indicate a phosphorus deficiency
and the curled leaves would indicate a temperature problem. Neither of these
issues seem to be a good answer though (because they were fertalized and have
consistent temperatures). On some of the seemingly healthy plants the leaves
fall off with a slight touch.

This is so sad, I hate to see my plants suffering! If I am
doing something wrong, how do I fix it!

I appreciate all of the advice I can get!

-Sacha Bays

---I have attached pictures---