stonestare
Active Member
Nutrient disorders are caused by too much or too little of one or several nutrients being available. These nutrients are made available between a pH range of 5 and 7 and a total dissolved solids [TDS] range of 800 to 3000 PPM [parts per million]. Maintaining these conditions is the key to proper nutrient uptake.
Nutrients
Over twenty elements are needed for a marijuana plant to grow. Carbon, hydrogen and oxygen are absorbed from the air and water. The rest of the elements, called mineral nutrients, are dissolved in the nutrient solution.
The primary or macro- nutrients. Nitrogen [N], Phosphorus [P] and Potassium [K] are the elements marijuana plants use the most. Calcium [Ca] and magnesium [Mg] are secondary nutrients and used in smaller amounts. Iron [Fe], sulfur, manganese [Mn], boron , molybdenum [Mb], zinc [Zn] and copper [Cu] are micro-nutrients or trace elements.
Trace elements are found in most soils. Rockwool [hydroponic] fertilizers must contain these trace elements, as they do not normally exist in sufficient quantities in rockwool or water. Other elements also play a part in marijuana plant growth. Aluminum, chlorine, cobalt, iodine, selenium, silicon, sodium and vanadium are not normally included in nutrient mixes. They are required in very minute amounts that are usually present as impurities in the water supply or mixed along with other nutrients.
Note!
The nutrients must be soluble [able to be dissolved in water] and go into solution.
Macro-nutrients
Nitrogen [N] is primary to marijuana plant growth. Marijuana plants convert Nitrogen [N] to make proteins essential to new cell growth. Nitrogen [N] is mainly responsible for leaf and stem growth as well as overall size and vigor. Nitrogen [N] moves easily to active young cannabis buds, shoots and leaves and slower to older marijuana leaves. Deficiency signs show first in older marijuana leaves. They turn a pale yellow and may die. New growth becomes weak and spindly. An abundance of Nitrogen [N] will cause soft, weak growth and even delay marijuana production if it is allowed to accumulate.
Secondary nutrients
Calcium [Ca] is fundamental to cell manufacture and growth. Soil gardeners use dolomite lime, which contains calcium [Ca] and magnesium [Mg] , to keep the soil sweet or buffered. Rockwool gardeners use calcium [Ca] to buffer excess nutrients. Calcium [Ca] moves slowly within the marijuana plant and tends to concentrate in roots and older growth. Consequently young growth shows deficiency signs first. Deficient leaf tips, edges and new growth will turn brown and die back. If too much calcium [Ca] is applied early in life, it will stunt growth as well. It will also flocculate when a concentrated form is combined with potassium [K].
Trace elements
Boron is necessary for cells to divide and protein formation. It also plays an active role in pollination and marijuana seed production.
These nutrients are mixed together to form a complete marijuana plant fertilizer. The mix contains all the nutrients in the proper ratios to give marijuana plants all they need for lush, rapid growth. The fertilizer is dissolved in water to make a nutrient solution. Water transports these soluble nutrients into contact with the marijuana plant roots. In the presence of oxygen and water, the nutrients are absorbed through the root hairs.
Solutions to nutrient deficiencies [the nutrients]
Marijuana plants need lots of Nitrogen [N] during vegetative period, but it's easy to overdo it. Added too much? Flush the soil with plain water. Soluble Nitrogen [N] [especially nitrate] is the form that's the most quickly available to the roots, while insoluble Nitrogen [N] [like urea] first needs to be broken down by microbes in the soil before the roots can absorb it. Avoid excessive ammonium nitrogen, which can interfere with other nutrients. Too much Nitrogen [N] delays marijuana flowering. Marijuana plants should be allowed to become N-deficient late in flowering for best flavour.
Other things
Cold weather [below 50°F | 10°C] can lock up Phosphorus [P]. Some marijuana varieties, like equatorial sativa's, don't take well to cold weather. If you can keep the roots warmer, the marijuana plant will be able to take cooler temperatures than it otherwise could.
I hope this basic article can dispose of the myths that people have and be sure to read the label of contents to see if you are getting everything to your plant. Having yellow leaves at the end of its life cycle is not a healthy plant period.Your yeild is affected besides having yellow leaves.
Nutrients
Over twenty elements are needed for a marijuana plant to grow. Carbon, hydrogen and oxygen are absorbed from the air and water. The rest of the elements, called mineral nutrients, are dissolved in the nutrient solution.
The primary or macro- nutrients. Nitrogen [N], Phosphorus [P] and Potassium [K] are the elements marijuana plants use the most. Calcium [Ca] and magnesium [Mg] are secondary nutrients and used in smaller amounts. Iron [Fe], sulfur
Trace elements are found in most soils. Rockwool [hydroponic] fertilizers must contain these trace elements, as they do not normally exist in sufficient quantities in rockwool or water. Other elements also play a part in marijuana plant growth. Aluminum, chlorine, cobalt, iodine, selenium, silicon, sodium and vanadium are not normally included in nutrient mixes. They are required in very minute amounts that are usually present as impurities in the water supply or mixed along with other nutrients.
Note!
The nutrients must be soluble [able to be dissolved in water] and go into solution.
Macro-nutrients
Nitrogen [N] is primary to marijuana plant growth. Marijuana plants convert Nitrogen [N] to make proteins essential to new cell growth. Nitrogen [N] is mainly responsible for leaf and stem growth as well as overall size and vigor. Nitrogen [N] moves easily to active young cannabis buds, shoots and leaves and slower to older marijuana leaves. Deficiency signs show first in older marijuana leaves. They turn a pale yellow and may die. New growth becomes weak and spindly. An abundance of Nitrogen [N] will cause soft, weak growth and even delay marijuana production if it is allowed to accumulate.
Secondary nutrients
Calcium [Ca] is fundamental to cell manufacture and growth. Soil gardeners use dolomite lime, which contains calcium [Ca] and magnesium [Mg] , to keep the soil sweet or buffered. Rockwool gardeners use calcium [Ca] to buffer excess nutrients. Calcium [Ca] moves slowly within the marijuana plant and tends to concentrate in roots and older growth. Consequently young growth shows deficiency signs first. Deficient leaf tips, edges and new growth will turn brown and die back. If too much calcium [Ca] is applied early in life, it will stunt growth as well. It will also flocculate when a concentrated form is combined with potassium [K].
Trace elements
Boron is necessary for cells to divide and protein formation. It also plays an active role in pollination and marijuana seed production.
These nutrients are mixed together to form a complete marijuana plant fertilizer. The mix contains all the nutrients in the proper ratios to give marijuana plants all they need for lush, rapid growth. The fertilizer is dissolved in water to make a nutrient solution. Water transports these soluble nutrients into contact with the marijuana plant roots. In the presence of oxygen and water, the nutrients are absorbed through the root hairs.
Solutions to nutrient deficiencies [the nutrients]
Marijuana plants need lots of Nitrogen [N] during vegetative period, but it's easy to overdo it. Added too much? Flush the soil with plain water. Soluble Nitrogen [N] [especially nitrate] is the form that's the most quickly available to the roots, while insoluble Nitrogen [N] [like urea] first needs to be broken down by microbes in the soil before the roots can absorb it. Avoid excessive ammonium nitrogen, which can interfere with other nutrients. Too much Nitrogen [N] delays marijuana flowering. Marijuana plants should be allowed to become N-deficient late in flowering for best flavour.
Other things
Cold weather [below 50°F | 10°C] can lock up Phosphorus [P]. Some marijuana varieties, like equatorial sativa's, don't take well to cold weather. If you can keep the roots warmer, the marijuana plant will be able to take cooler temperatures than it otherwise could.
I hope this basic article can dispose of the myths that people have and be sure to read the label of contents to see if you are getting everything to your plant. Having yellow leaves at the end of its life cycle is not a healthy plant period.Your yeild is affected besides having yellow leaves.