Cannabis cultivation: How to use LED plant lights to grow cannabis for supplementary light? The growth and development of cannabis requires an effective accumulated temperature of 2400-3200℃. The seedlings can withstand -5–3℃ frost, and short-term low temperatures will not affect them.

Hemp seedling growth. Cannabis is mostly sown in early spring when the soil temperature is above 8℃ at 5 cm below the surface. Within 30 days after the hemp seedlings emerge from the ground, they are mostly not irrigated, and LED plant growth lights are used to promote growth to control seedlings and promote rooting. According to the morphological differences between male and female seedlings, male seedlings can be selected and female seedlings can be removed when the seedlings are fixed to improve the fiber quality. Female seedlings are selected for seeding hemp fields.

The suitable temperature for hemp growth is 19-23℃. The average daily growth of hemp plants is 3-5 cm, and can reach about 10 cm at the peak of growth. At this time, they can withstand atmospheric drought but not soil drought, so continuous irrigation is usually started one month after the emergence of the seedlings to keep the maximum water holding capacity of the soil at about 80%. Early application and heavy application of quick-acting fertilizers combined with irrigation can promote stem growth. The density of seedlings varies according to the cultivation methods in different places. Generally, 80,000 to 150,000 seedlings are left per mu for early-maturing varieties, and 30,000 to 50,000 seedlings are left per mu for late-maturing varieties. In China, the main pests are hemp fleas and small weevils, and the diseases are sclerotinia and damping-off.

How to grow hemp with plant lights? The new LED plant lights we developed are now on the market. They use double lenses, which have enhanced penetration and increased illumination, making them ideal for supplementary lighting for hemp.

The role of hemp plants

Thousands of years ago, traditional herbalists used hemp to treat a variety of diseases, from earaches to arthritis to convulsions. Since the beginning of the 21st century, the benefits of hemp for a wide range of diseases (including glaucoma, chemotherapy-induced nausea and vomiting, multiple sclerosis (MS), AIDS-induced wasting, etc.) have attracted the attention of all relevant parties, especially patients and management departments.

MS patients are at the forefront of legalizing medical marijuana. About 90% of MS patients who have used marijuana report that it relieves spasms, stiffness and pain. If further research supports this claim, pressure will increase on governments around the world to legalize medical marijuana. Of course, both doctors and regulators would prefer to see conventional dosage forms containing a single active ingredient. Cannabinoid receptors also affect brain functions, including nociception (pain response), motor control, memory, neuroendocrine regulation, and normal brain development. So it's not surprising that marijuana may have a role as a recovery drug.