Ideal conditions for veg growth is 60%-70% humidity and temps of 70-80 F (22-27C). Once a cannabis plant has a well-established root system, and 6-8 nodes of growth it enters the vegetative growth stage. Photoperiods are usually set for 18/6 and light intensity is slowly increased during the seedling stage to prepare for vegetative growth. This causes lower branches to receive more growth hormones, and rapidly grow toward the light.Ĭannabis plants love light. Topping is the removal of the plant’s growth tip.

Structure can be shaped during the seedling stage by use of low stress training, and high stress interventions like topping. Small adjustments made at the seedling stage can have a big impact on your plants structure and yield. Once young plants are well rooted, and growing vigorously, they can recover quickly from pruning and training. After 4 - 6 nodes, plants should be producing small 5 bladed leaf sets that will grow to become large fan leaves as the plant develops. Healthy seedlings will often form a couple of nodes per week and begin building more complex leaves as they grow. As your plant continues to develop, new shoots will form at each node, and eventually develop leaves and branches of their own. The connection point between each leaf stem (petiole) and the main stem is called a growth node. These first true leaves look like pot leaves and grow on opposite sides of the stem. Seedling growthĪfter the seed leaves have emerged, the stem continues to elongate, and a set of single bladed, serrated leaves will form. Seedlings are sensitive to heavy fertilization, but your plants will probably benefit form a light feed once they are rooted into the new soil. Organic soils contain compost and probiotics that help feed your plants and protect them from diseases. Seedling soil mixes are made from natural fibers and aeration inputs like perlite that allow rapid air and water exchange in the root zone. This growth stage usually lasts 2-4 weeks. You can use an inexpensive digital sensor to log temp and humidity so that you know what is happening in your grow room when you aren’t there. Ideal growth conditions for the weed seedling stage includes 65%-75% relative humidity and temperatures of 70-80 F (22-27C). The best liquid Kelp products are cold pressed rather than heat treated to preserve these benefits. Kelp also contains micronutrients, vitamins, and amino acids. Kelp contains natural hormones called plant growth factors which promote root development. Liquid kelp can also be used in your rooting solution. These bioprotectants will help to fight off fungal pathogens that cause damping off, and other diseases. Root plugs can be soaked in a solution containing microbial products like Actinovate, and Root Shield. Whether growing from seed or clone, growers can benefit from the disease fighting powers of probiotics. High humidity and no airflow create ideal conditions for disease and clone domes should vented and removed regularly to allow for air exchange. Plastic domes can be used to create a humid environment for your cuttings. Clones will usually root and be ready to plant after 10-18 days. Rooting ClonesĬlones like relative humidity (RH) over 80%, 24-hour photoperiods, and low light conditions to form new roots.Īs clones start to root, the humidity should be slowly reduced to 70%-75% which is optimal for the early growth stage. To avoid shock, most growers will avoid transplanting and direct sow, or transplant plugs as soon as they are rooted. These plants are in a hurry and won’t tolerate root disturbance. This photosynthesis begins the seedling growth stage.Īutoflowering plants are always grown from seed. This embryonic stem stretches from the soil, sometimes wearing the seed coat like a helmet.Ī pair of seed leaves, or cotyledons expand to collect sunlight for the formation of more complex leaf sets. This food source sustains the young plant until it can begin producing energy through photosynthesis.Īs the tap root pushes down into the earth, the hypocotyl reaches for the light. Initial growth is fueled by energy reserves stored in the seed endosperm. Once your cannabis seed is planted, the tap root will sense gravity and start growing down into the earth.

Grow light schedule for seedlings