I have a patio tomato plant, celebrity, and a cherry tomato plant. I have a...

Asked May 31, 2014, 10:41 AM EDT

I have a patio tomato plant, celebrity, and a cherry tomato plant. I have a bright patio security light, a bright CFL type, on all night. Will this hinder the growth and production of these plants? Should I move the plants if I can?

Ramsey County Minnesota appliances and lighting patio tomato

1 Response

Wow - this is a great question!
I had to do some research to back up my intuition that "Yes, you can have too many hours of light"
Here is a quote from a large grower:
Tomato plants should have six to eight hours of darkness to grow properly. Other plant functions take place when photosynthesis is not occurring. When photosynthesis occurs, it takes priority over some other activities in the plant.

The whole article can be found here:
http://www.hort.vt.edu/ghvegetables/documents/GH%20Lighting/Light%20in%20the%20Greenhouse_JBrown.pdf

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