White clover fixes nitrogen and is an excellent source of green manure
White Clover (Trifolium repens) is a tough, low growing ground cover that is difficult to kill and will cover any open spaces between other plants. It has little nutritional or medicinal value, but can perform several other specialized functions that help you grow healthy organic cannabis. White Clover acts as a living mulch and protects the soil from exposure to heat and radiation while aiding water penetration and encouraging soil friability. It grows rapidly and is a ready source of mineral rich green manure. As such it is an ideal addition to any cannabis grow as a companion plant.
What makes White Clover really special is its ability to fix nitrogen. Nodules on the roots fix and stabilize atmospheric nitrogen. As the plant decays, it releases this high-quality nitrogen into its local environment which encourages healthy growth in neighboring plants. Cannabis is notoriously nitrogen hungry and responds brilliantly to White Clover which in turn saves you money on commercial fertlizers. The pretty white and pink puffball flowers are tantalizing for honeybees and butterflies and will self-sow ready for next spring.