How to tell if cannabis is overwatered?
- Normal stress response
When the marijuana plant lacks water and the light is too strong, the marijuana leaves will rise up, just like the claws stretched upwards, the edges of the leaves will merge toward the middle. This performance is usually due to too much energy provided by the outside, and the cannabis plant begins to reduce the stress performance of the intake of external energy.
Over-watering is a mistake that many growers make. When growers pay too much attention to the growth of plants, they basically make the mistake of over-watering.
When the environment is too humid, too much fertilizer, too low oxygen content, and too weak, the cannabis leaves will bend downwards and unfold themselves vigorously. This performance is because the energy of the cultivation environment is too low, and the cannabis plant needs to take in more energy.
The above two kinds of stress manifestations are within the range of cannabis health and are also the boundary point of cannabis health. If they exceed this boundary, cannabis is at risk of injury and death. That is, in the two border points, the leaves of hemp, like butterflies, fall together, open and close together. This is also the action of the hemp plant growing healthy.
Generally speaking, marijuana plants will have their leaves up during the day when the sun is full, and at night, the leaves will hang down; when the environment is hot, the edges of the leaves will fold in, and when the soil is too wet, the leaves will change to Xiahe. These are the normal actions of marijuana itself as the environment changes, as long as the leaves do not have obvious discoloration or spots, they are all normal.
- Symptoms caused by excessive watering
However, when the leaves are bent down too much and the soil is too wet, the growers continue to water and fertilize without realizing it, which will seriously damage the root health of cannabis, and even kill the roots, causing symptoms similar to root rot on the upper part of the cannabis.
When lightly wet, the cannabis leaves will bend down too hard and look listless.
In severe cases, marijuana has no time to show stress, and the roots have been damaged, and the function of transporting nutrients to the leaves has been lost. The leaves will turn yellow, the tips of the leaves will wither, and the leaves will have spots, which are very similar to the symptoms of root rot.
When the marijuana plant is mildly wet for a long time, although the roots of the cannabis plant are not damaged, the ability to transport oxygen and nutrients to the whole body is suppressed, and the plant will show symptoms of nutrient deficiency. , The leaves will turn yellow, grow slowly, and grow steeply (the branches are too long, not sturdy, lose their original sturdy shape, the phenomenon of crazy elongation of stems and leaves,)
When the growth medium is too viscous, the roots cannot obtain oxygen to complete their own absorption and transport functions, and they will also exhibit excessive watering.
When the soil is excessively moist, green algae will grow on the surface of the soil. Evergreen algae shows that the soil has good air permeability and the soil is moist, but this moisture is too wet for hemp.
- Reasons for too much watering:
Watering too frequently or watering too much at once
The growth medium is too dense or the inorganic salt concentration is too high
The flowerpot has no drainage function, which prevents excess water from flowing out
Plant leaves evaporate water too slowly, such as low temperature, insufficient light, and poor air circulation
The air environment is too humid, and the air humidity cannot exceed 80% in the seedling stage, 70% in the growth period, and 60% in the pre-flowering period and flowering period.
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How to water cannabis?
Most hemp likes moist air, but slightly dry soil. As hemp grows, they need soil with lower and lower humidity. When watering marijuana, you should gradually reduce the amount and frequency. Look at her leaves. When the leaves are slightly lower, it means that the soil moisture is enough; when the leaves are higher, it means that she needs to drink water. Different growth periods of cannabis have different requirements for water. A little dryness is better than excessive wetness. This requires the grower to figure it out according to different soils.
Every time you change pots of cannabis, weigh the whole number before watering, and then weigh the weight after watering, and write down the weight. Every time you water, keep the whole weight in this weight range. The most suitable weight is 3/4 of the heaviest time.
Look at the soil surface. When there is obvious water on the soil surface, it means that the water has been a little bit too much. If you can see the runoff, it means that the watering is too much. A good amount of water will make the soil look a little bit moist.
To choose the right soil, it is recommended that novice growers buy special gardening soil, the kind of soil with exquisite packaging. Many low-priced soils bought from the flower market and prepared by the boss themselves will become sticky when watered, stick together, and become a large piece. The ventilation of this soil cannot satisfy the healthy growth of cannabis.
To choose the right flower pot, novices should buy flower pots with holes in the bottom, preferably non-woven flower pots or air flower pots. A good flower pot can greatly avoid the occurrence of excessive watering.
When watering, water slowly to cover all the soil on the surface, and finally let a little excess water flow out of the soil, which is to pour the soil thoroughly. Water the soil thoroughly when it is almost dry. This is a very good watering method.
How to save?
When marijuana is over-watered and shows wilt and leaf spot disease, place the marijuana plant in a ventilated, cool, and soft-lit environment, maintain an air humidity of 40%, a temperature of 20-28 degrees Celsius, and a light intensity of 10,000 to 30,000. . Cut off the leaves and branches that are visibly diseased, and only water half of the usual amount of water when the soil is about to dry.
Give cannabis a mild environment and let it slow down slowly, and drowning plants can slow down within a week or two in a suitable environment.