Q.growing lemon tree indoors
What is the optimum wavelength for grow light for lemon tree?

Downtoearthdigs
Answered on June 17, 2016
Here are some links that will help you.
https://www.gardeningknowhow.com/edible/fruits/citrus/growing-citrus-trees-indoors.htm
https://www.gardeningknowhow.com/houseplants/hpgen/what-are-grow-lights.htm
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