Keep on the Sunny Side - How to Grow Edible Plants Indoors - Vegetables "On Demand" - Bob Vila
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Keep on the Sunny Side
The trickiest part of growing vegetables indoors is providing them with plenty of light. If your window is intermittently shaded by buildings or trees, a sill alone won't offer enough sunlight for the plants to fruit. To supplement the sun, suspend an LED or HID lamp about a foot above the plant, and keep the light beaming around 20 hours per day.