Excess of nitrogen in marijuana plants:
Claw-shaped leaves
By contrast, excess nitrogen in marijuana plants can also cause trouble, reducing their yield and flower quality. Nitrogen overfeeding can be noticed when the following symptoms appear:
- Excessive foliage growth.
- Weak stems.
- Delayed ripening of fruits, being less sweet.
- Claw-shaped leaves facing down.
- Poor bud combustion.
- Bright green leaves.
- Little resistance to pests in general.
To solve this, wash the plant roots using
triple the capacity of the pot of water and
low levels of EC. Test the EC (water conductivity) to find out the salt saturation in the substrate, and if the case is extreme, don’t stop washing the roots until the nutrient levels in the substrate are the same than the water we are using for flushing.
There are
products specifically designed to dilute salts and help washing the soil for a quicker recovery.
How does cannabis recover from excess nitrogen
Cannabis, as mentioned above, is capable of showing its health through its look, so it is easy to find out the health state of our plants by carefully observing their leaves, colour, shape, etc.
Whether the plant has been
over-fed or if it has suffered a lack of nitrogen, cannabis always takes a few days to recover. The speed of recovery will always depend on the degree of deficiency or excess suffered by the plant, so early detection will always allow a better recovery of the plant in
a shorter period of time.
Depending on the substrate and fertilisers used, plants may recover
slower or faster. In hydroponic systems, the speed of recovery is much faster than in crops grown in soil with organic fertilisers. As mentioned at the beginning of this post, the form in which these nutrients are dispensed greatly determines the absorption speed.
During the
growth phase and in the event of a light over-fertilisation, you will need to reduce or eliminate the fertilizer for growth used in your nutrient solution.
Deficiency of nitrogen progress
If you are using
marijuana additives, you can keep on using them normally as they contain no nutrients, only elements that make the plant metabolize the excess nutrients and produce
more leaves, branches…in short, they allow the plant to use all the available nutrients correctly.
During the
flowering phase, if you over-fertilise your plants you will need to act according to the stage of the crop. If it happens during the first two weeks after the photoperiod change, you should do as you would during the growth phase, since the plants still grow almost until
the 3rd week, which is when buds begin to develop.
However, if the plant is already starting to bloom, excess nitrogen is not very common, but if this is the case, remove the fertiliser used and add a PK-based fertiliser, which contains no extra nitrogen. In this way, your plants can continue to produce buds whatever the stage they are while the excess nitrogen is eliminated. If the over-fertilization is heavier, you can wash the roots previously to clean the substrate from the excess nutrients. After this,
water thoroughly with the right amount of PK.
https://www.alchimiaweb.com/blogen/deficiencies-excesses-nitrogen/