One can grow plants in the dark because the dominant type of chlorophyll in plants only needs the purple wavelength of light to function. Therefore, using red and blue light, one can create purple light that the plants c... More »

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There are not six months of darkness in Alaska. The northernmost town of Barrow only gets 67 days of winter with no sun. Only places above the Arctic Circle get days with no sun during the winter, so a good portion of Al... More »

"Value" is the term that describes the lightness or darkness of a color. The value of a color helps to define a form and to create the illusion of depth in an image. More »

Nitrates are one of the three forms of nitrogen found in soil that plants use to grow and produce chlorophyll and proteins. It is a component of DNA, which transfers genetic information cell reproduction and plant reprod... More »

Most plants would not grow very well under yellow light, as this color is not easily absorbed by photosynthetic pigments in plants for use in photosynthesis. As a result of poor light absorption, the plant would probably... More »

Plants grow better in sunlight than in artificial light although both sunlight and artificial light provide the energy required for plants to grow. Plants need energy in the form of photons to grow, and there is much mor... More »

Sunflower seeds sprout in seven to 10 days, and the plants mature and produce seeds in 80 to 120 days, depending on the type of flower, according to Burpee, a seed distributor. Plants need to be about 2 feet apart. More »