Making clones is the most efficient and productive means of cannabis propagation for most growers. A clone is a branch tip cut from a (female) mother marijuana plant that has been planted and has grown roots. Female clones can be induced to flower as soon as they have a strong root system and are 6-18 inches (l5-45cm) tall.
Clones go through an enormous transformation when they change from a severed growing tip to a rooted plant, their entire chemistry changes. The stem that once grew leaves must now grow roots to survive. Clones are at their most vulnerable point in life when they are cut from the mother and forced to grow roots.
While rooting, clones require a minimum of nitrogen and increased levels of phosphorus to promote root growth. Avoid spraying during rooting because it creates extra stress. With good instruction and a little experience, you can achieve a consistent 100 percent clone survival rate. Large cuttings with large stems grow roots slower than small clones with small stems, and are more prone to diseases.
Thin-stemmed small clones with few leaves root faster than big leafy cuttings because there are no roots to absorb water and supply moisture to foliage. A small amount ofleaf space is all that is necessary to supply enough energy for root growth. Some cuttings may wilt but regain rigidity in a few days. Older leaves may turn light green growth slows as nitrogen is used and carbohydrates build. Carbohydrate and (rooting) hormonal content is highest in lower, older, more mature branches. A rigid branch that folds over quickly when bent is a good sign of great carbohydrate content.
Always make sure there is plenty of air in the rooting medium to stimulate root growth. Do not overwater clones. Keep the rooting medium evenly moist. Do not let it get soggy. Any kind of stress disrupts hormones and slows rapid growth. Disinfect all tools and working surfaces to kill bacteria, fungi, viruses, and other diseases already present.
A crop of clones can be harvested in about three months. When planted from seed, crops take four to five months to mature. And unless you planted feminized seed about half of the plants will be undesirable males. Clones are not available by mail order. You must grow them yourself or get them from a grower or medical marijuana cooperative. Induce clones to flower when they are 6-18 inches (l5-45cm) tall to make most efficient use of HID light. Short crops of clones in small containers are much easier to move and maintain than big plants in big containers. Clones are also easy to submerge in a miticide when small. Any plant can be cloned, regardless of age or growth stage. Take clones from mother plants that are at least two months old.
Keep several vegetative mother plants for a consistent source of cloning stock. Start new mothers from seed every year. Give the original plants or also known as the mother plants enough hour oflight per day to maintain fast growth. For best results, you may considere giving the original plant nitrogen that is not more than 10% as this can help in the rooting process.
A female plant will reproduce 100 percent females, all exactly like the mother. When grown in the exact same environment, clones from the same mother look alike. But the same clones subjected to distinct environments in different grow rooms will often look different.