There is nothing as no easy as to cultivate a marijuana plant, it is enough with seeding a seed and watering it from time to time. The problems arise months later when the plantita begins to show worrisome symptoms of which something does not go well. This guide is an aid to find out the cause of the problem. It must serve like general direction, since each plant and each garden are different. It begins reading by number one and follows until you find the definition that better adjusts to the problem of your plant.
1. If the problem only affects to the average or low part of the marijuana plant, it sees I number 2. If single it affects to the ends in growth or the part superior of the plant, it sees to number 10. If the problem appears in all the plant, sees number 6.
2. The leaves have a yellow or green color clear uniform; the leaves die and fall; the growth is slow. The edges of the leaves are not twisted. 诊断： nitrogen deficiency (n). If no, it sees number 3.
3. The ends of the leaves can be twisted. The leaves yellow and can be put brown, but the nerves of the leaves stay green. Zones arise from necrosis (woven died) of brown color oxide. Diagnosis: magnesium deficiency (Mg). If no, it sees number 4.
4. The leaves of the marijuana are put brown or yellow from the edges towards the center. They mainly appear zones of necrosis (woven died) of yellow or brown color in the edges of the leaves, that can be twisted. The plants can be very high, but the leaves fall with facility. Diagnosis: potassium deficiency (k). If no, it sees number 5.
5. The leaves are of almost bluish dark green color or with a reddish tone purple. The stems and the pecíolos of the marijuana leaves can take to a reddish color purple or, although it always does not happen. In the leaves they appear zones of necrosis of dark color black purple, in oldest and those of intermediate age. The leaves twist and they are ended up dying. The falling leaves are twisted and wrinkled with a characteristic ocher color. The growth is slow and the small leaves. Diagnosis: phosphorus deficiency (p). If no, it sees number 6.
6. The ends of the leaves are yellow, brown or dead. On the other hand, the plant is seen heals and green. The stems can be soft. Diagnosis: sobrefertilization (specially nitrogen), excess of irrigation, damaged roots or insufficient ventilation of the land (to put more sand or pearlite in the mixture). Sometimes it is due to a deficiency of nitrogen, phosphorus or potassium. If no, it sees number 7.
7. The leaves are curved downwards as a claw and have a dark, gray, brown or golden color green. Diagnosis: sobrefertilization (excess of nitrogen). If no, it sees number 8.
8. The plant is mustia or withered, although the Earth is humid. Diagnosis: sobrefertilization, too humid earth, damaged roots, some copper disease, deficiency (it is very rare that it happens). If no, it sees number 9.
9. The marijuana plants do not bloom although they have been having twelve hours of the dark for two weeks. Diagnosis: the nocturnal period is not completely dark. Too much nitrogen. Too many prunings or esquejes. If no, it sees number 10.
10. The leaves are yellow or blanquecinas, but the nerves remain green. Diagnosis: iron deficiency (Faith), possibly due to pH too high. If no, it sees number 11.
11. The leaves twist, soon they are put of brown color or they die. Diagnosis: in a interior culture, the lights are too much close. Rarely, a deficiency of calcium (Ca) or boron (b). If no, it sees number 12.
12. Your plant can be a weak plant.
GENERAL ADVICE TO SOLVE DEFICIENCIES
The nutritious deficiencies of the plants usually do not come single. Habitually we will find two or more deficiencies simultaneously. Many deficiencies, specially those of microelements, do not have to a lack of that element, if not to pH inadequate or an excess of Earth salts. When this happens, the roots cannot absorb the nutrients, although they are present in the Earth. In order to solve this deficiency, the technique to follow is the following one. In the first place we will wash the Earth watering it with a considerable amount of water, that we will leave slips by the drainage holes. The water took dissolved the salts that were present in the Earth, leaving it clean of salts. It is essential to wash to the Earth by far water. around two liters by each liter of earth. Next we will water the plants with a fertilizing solution. It is important to use installments NPK with microelements during all the life of the plant. The cannabis is a plant that grows quickly and needs much food. If we cultivated in flowerpots, will be necessary to pay once per week with a liquid fertilizer so that the plant don’t mention it it does not need. We will avoid that the rest of fertilizers washing periodically the Earth are accumulated (at least every two weeks). pH is a scale that goes from 0 to 14 and indicates the acidity or alkalinity of any substance, being 0 the Maxima acidity, 14 the Maxima alkalinity and 7 pH neutral. The cannabis grows well in pH slightly acid (pH 5.8 to 6.5 in hidroponía and pH 6.3 to 6.8 in earth). If pH raises over 7 or 7.2, begin the deficiencies, like if pH is too low. In order to measure pH we can use litmus paper or measurers of pH for aquariums. In the stores specialized in cannabis culture also measurers digital, more expensive but more exact can be found. If pH of the water is very high or very low, we will fit with an acid or a base to it, respectively. It is necessary to always fit pH of the water before watering. If we added installment to the water, we will fit pH after adding the fertilizer. In order to avoid deficiencies of nutrients, the best thing is the prevention: it controls pH of the water and on the Earth, it feeds your plants one or twice per week with liquid installment and washes to the Earth every two weeks.
Article of the magazine HEMP nº 29, May 2000 Texts: J.T.Gállego. For more info.: www.canamo.net
