Another environmental factor you've got to watch when growing vegetables under lights is temperature. Fluorescent lights don't generate much heat, but even they produce enough to take into account; incandescent bulbs, of course, give off a lot of heat for their size. Cool-season vegetables such as lettuce like temperatures that don't rise much above 65 degrees Fahrenheit. Warm-season vegetables such as tomatoes grow and mature best when the temperature is above 65° and below 90° F. And this is during the day. Night temperature should be 50 to 60 degrees for leafy and root vegetables, a little higher for the warm-season varieties.
Raising lettuce and tomatoes side by side is therefore involves quite a bit of juggling, even though you probably want both for salads. You can try placing cool-season vegetables at one end of the table, warm-
season vegetables at the other end, varying the temperature along the table by such trickery as putting a heat-producing incandescent bulb at the warm-season end to beef up the fluorescent bulbs.
If your temperature is unsatisfactory and the air is stagnant around your indoor light garden, investigate the possibility of installing a small fan or other device to improve the ventilation.
Was this article helpful?
You Might Just End Up Spending More Time In Planning Your Greenhouse Than Your Home Don’t Blame Us If Your Wife Gets Mad. Don't Be A Conventional Greenhouse Dreamer! Come Out Of The Mould, Build Your Own And Let Your Greenhouse Give A Better Yield Than Any Other In Town! Discover How You Can Start Your Own Greenhouse With Healthier Plants… Anytime Of The Year!