Growing tomatoes under lights
I'm growing some tomato plants under a 400 watt metal halide lamp. They
are about three weeks old and several are a few days from blooming. Right
now I have them under 18 hours of light and 6 hours of darkness.
Should I continue to keep them under the MH lamp or should I switch over
to my high pressure sodium lamp? Also, should I change the light schedule
at all?
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