Answer: Plants become leggy due to insufficient light. You may need to put flourescent lights in your greenhouse to supplement the natural light. Use shop lights and place them about 6 inches above the tops of your plants, raising them as the plants grow. This will encourage the seedlings to remain stocky rather than grow tall and spindly. Seedlings will need 14-16 hours of light each day to grow well, but they need a rest period at night, so be sure to put your lights on a timer or remember to turn them out at night.
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