Substantial light and proper temperatures are crucial for fast growth, healthy plants, and high yields. Your planter should be placed in a well lit location—unobstructed south or west-facing windows will produce the best results. Most leafy greens want at least 4-6hrs of direct light, while flowering and fruiting plants want 10-12hrs. Even with limited light you have plant options, including chives, lemon balm, mint, sage, shiso, lettuce, arugula, kale, Swiss chard, spinach, peas and a variety of houseplants. The optimal temperature for most plants is 65⁰-75⁰F. Supplemental light—especially during winter months—enables year-round indoor growing and fills the gaps during dark days. Herbs and leafy greens will benefit from a fluorescent light bulbs (tubes or CFLs). LED grow lights are becoming more popular and efficient, and are available in two color spectrums—blue and red. Blue wavelengths are ideal for the vegetation and red wavelengths are designed for the flowering and fruiting stages. H.I.D. (High Intensity Discharge) grow lights, such as Metal Halide and High Pressure Sodium, are common in commercial indoor growing.