Q:

Which color light would help grow plants?

A:

Quick Answer

A cool-white fluorescent light is ideal for starting seeds indoors. A broad-spectrum fluorescent lamp is used for flowering plants. Incandescent bulbs produce too much heat.

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Full Answer

Vegetation requires blue light to grow, while flowering plants thrive with a combination of blue and red light. The cool-white fluorescent bulbs are high in the blue range, while the broad-spectrum fluorescent lamp provides all colors of the light spectrum.

When growing transplants indoors, the plants should generally receive 12 to 14 hours of light per day. Short-day plants should receive long night darkness to flower, and long-day plants need a shorter period of night darkness. Day-neutral plants flower no matter how long or short the night darkness is.

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