Cold frames: A useful resource for cool and cold-weather gardening Have you ever tried to start seeds indoors and ended up with anemic, gravity challenged sprigs? Bright, direct light is vital to emerging seeds and most windowsills are not sunny enough. This leaves you with two options: Indoor grow lights (like the DIY grow light system we recommend), or real sunlight with cold protection. Artificial lighting (grow lights) is an ideal choice if you have the indoor space. If your indoor space is at a premium but you want to start garden seedlings to get a jump start on the...