Read Online Marijuana Horticulture: The Indoor/Outdoor Medical Grower's Bible by Jorge Cervantes - Free Book Online
Authors: Jorge Cervantes
Tags: Marijuana Horticulture
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Outdoor strains with a slight tendency to pre-sex in an 18hr photoperiod include: Early Girl, Early Skunk and many others. Check with seed companies for details. But early flowering does not exclude them as mother plants.
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Getting Ready
Cloning is the most traumatic incident cannabis plants can experience. Clones go through an incredible 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 in order to survive. Clones are at their most tender point in life now.
Clones quickly develop a dense system of roots when stems have a high carbohydrate and low nitrogen concentration. Build carbohydrate levels by leaching the growing medium with copious quantities of water to flush out nutrients. The growing medium must drain very well to withstand heavy leaching without becoming waterlogged. Reverse foliar feeding will leach nutrients from leaves, especially nitrogen. To reverse foliar feed, fill a sprayer with clean water and mist mother heavily every morning for three or four days. Older leaves may turn light green; growth slows as nitrogen is used and carbohydrates build. Carbohydrate and hormonal content is highest in lower, older, more mature branches. See drawing on previous page. A rigid branch that folds over quickly when bent is a good sign of high carbohydrate content.
Clones from lower branches root the easiest because they contain more of the proper hormones.
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Integrity in parents:
Maintain 18-24-hour day photoperiod
Keep plants healthy
Grow for 6-9 months
Repot
Grow hydroponically
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Hormone content is different in different parts of a plant. Root growth hormones are concentrated near the base of the plant close to the main stem. This is the oldest portion of the plant and is where most root hormones are located. The top of the plant contains older hormones; cuttings taken from this part root slowly.
While rooting, clones require a minimum of nitrogen and increased levels of phosphorus to promote root growth. Sprays should be avoided during rooting as they compound cloning stress. Given good instruction and a little experience, most growers achieve a consistent, 100 percent clone survival rate.
Large cuttings with large stems packed with starch grow roots slower than small clones with small stems. The excess starch in moist substrate also attracts diseases. Thin-stemmed clones have fewer reserves (accumulated starch), but they only need enough reserve energy to initiate root growth.
Small clones with few leaves root faster than big cuttings with many leaves. At first leaves contain moisture, but after a few days, the stem is no longer able to supply enough moisture to the leaves, and the clone suffers stress. A small amount of leaf space is all that is necessary for photosynthesis to supply enough energy for root growth.
These ‘Ortega’ clones were taken on August 25. Now they are rooted and ready to transplant.
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This chart shows average times for roots to grow from the cambium. Note: Clones taken from younger growth root about twice as fast as those taken from older growth.
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Precautions
An embolism is a bubble of air that gets trapped in the hole in the stem. Embolisms occur when you take big clones and lay them on the counter before placing in water or a growing medium. When an embolism happens, fluid flow stops, and clones die. After taking cuttings, immediately dip them in water or a growing medium to prevent air from getting trapped in the hollow stems. Eliminate the threat of an embolism by taking cuttings under water.
Clones root well within a pH range of five to six. Aeroponic clone gardens normally do best with a pH of five to five and a half. Most diseases grow poorly below these pH levels. Always make sure there is plenty of air in the rooting medium; this will stimulate root growth.
Do not kill clones with kindness and fertilizer. At best, giving clones
----
Getting Ready
Cloning is the most traumatic incident cannabis plants can experience. Clones go through an incredible 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 in order to survive. Clones are at their most tender point in life now.
Clones quickly develop a dense system of roots when stems have a high carbohydrate and low nitrogen concentration. Build carbohydrate levels by leaching the growing medium with copious quantities of water to flush out nutrients. The growing medium must drain very well to withstand heavy leaching without becoming waterlogged. Reverse foliar feeding will leach nutrients from leaves, especially nitrogen. To reverse foliar feed, fill a sprayer with clean water and mist mother heavily every morning for three or four days. Older leaves may turn light green; growth slows as nitrogen is used and carbohydrates build. Carbohydrate and hormonal content is highest in lower, older, more mature branches. See drawing on previous page. A rigid branch that folds over quickly when bent is a good sign of high carbohydrate content.
Clones from lower branches root the easiest because they contain more of the proper hormones.
----
Integrity in parents:
Maintain 18-24-hour day photoperiod
Keep plants healthy
Grow for 6-9 months
Repot
Grow hydroponically
----
Hormone content is different in different parts of a plant. Root growth hormones are concentrated near the base of the plant close to the main stem. This is the oldest portion of the plant and is where most root hormones are located. The top of the plant contains older hormones; cuttings taken from this part root slowly.
While rooting, clones require a minimum of nitrogen and increased levels of phosphorus to promote root growth. Sprays should be avoided during rooting as they compound cloning stress. Given good instruction and a little experience, most growers achieve a consistent, 100 percent clone survival rate.
Large cuttings with large stems packed with starch grow roots slower than small clones with small stems. The excess starch in moist substrate also attracts diseases. Thin-stemmed clones have fewer reserves (accumulated starch), but they only need enough reserve energy to initiate root growth.
Small clones with few leaves root faster than big cuttings with many leaves. At first leaves contain moisture, but after a few days, the stem is no longer able to supply enough moisture to the leaves, and the clone suffers stress. A small amount of leaf space is all that is necessary for photosynthesis to supply enough energy for root growth.
These ‘Ortega’ clones were taken on August 25. Now they are rooted and ready to transplant.
----
This chart shows average times for roots to grow from the cambium. Note: Clones taken from younger growth root about twice as fast as those taken from older growth.
----
Precautions
An embolism is a bubble of air that gets trapped in the hole in the stem. Embolisms occur when you take big clones and lay them on the counter before placing in water or a growing medium. When an embolism happens, fluid flow stops, and clones die. After taking cuttings, immediately dip them in water or a growing medium to prevent air from getting trapped in the hollow stems. Eliminate the threat of an embolism by taking cuttings under water.
Clones root well within a pH range of five to six. Aeroponic clone gardens normally do best with a pH of five to five and a half. Most diseases grow poorly below these pH levels. Always make sure there is plenty of air in the rooting medium; this will stimulate root growth.
Do not kill clones with kindness and fertilizer. At best, giving clones
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