Do plants grow faster certain colors of light?
Yes they do, certain colors provide certain vitamins/minerals
and only sunlight has all the vitamins/minerals needed.
Plants get vitamins and minerals from soil, not sunlight.
Plants grow slowest under green light because chlorophyll
reflects green light (which is why they look green). Plants grow
faster under red or blue light. Sunlight is a mixture of red, green
and blue light.
Plants do get vitamin D from the sun, as do people.
Plants do not generate vitamin D from sunlight. Vitamin D is
generated in the skin of vertebrates and is necessary for
maintaining the bones. The vitamins that plants cannot gather from
the soil are generated using a number of different methods. Plants
do not require vitamin D.