Welcome to the cannabis deficiencies and solution section. In this section you will find and can ask about cannabis plant growth issues, cannabis deficiencies, cannabis toxicity issues, cannabis pest issues. If your cannabis plant has a issue you can look for answers here. To become part of our online cannabis growing community click here to register.

Zinc Deficiency

Post Reply
User avatar
Keeno
Site Admin
Posts: 25512
Joined: Sat Oct 07, 2017 10:11 pm
Has thanked: 10550 times
Been thanked: 17044 times
Contact:
Status: Offline

Zinc Deficiency

Post by Keeno »

Zinc Deficiency



Symptoms:

Leaf Colour: 
Yellow Leaves - New Growth
Yellowing Between Veins
Mottling / Mosaic Pattern

Leaf Symptoms: 
Upper Leaves / Newer Growth Affected
Leaf Tips Appear Burnt
Leaf Tips Die
Yellowing Between Veins
Mottling / Mosaic
Slow Growth
Twisted Growth
Leaves Curl Under

Plant Symptoms: 
Slow Growth
Leaves Curl Under
Too Short
Other Symptoms: 
Buds Not Fattening

Problem: With a cannabis zinc deficiency, younger leaves start yellowing in between the veins. Leaf tips get discoloured and start dying. the leaves may take on a unique banded appearance and the plant may stop growing vertically. There may be much less space between new nodes, which can cause new leaves to start bunching together. If the plant is budding, its flowers may stop growing or even start dying if the problem isn't corrected.





Solution For Cannabis Zinc Deficiency
Note: Sometimes a cannabis zinc deficiency (like all deficiencies) can be triggered by stressful conditions and may clear up on its own after the period of stress is over. However, to minimize damage it's important to react to any growing problem as quickly as possible, especially in the flowering stage.

1.) Adjust pH to Correct Range
The most common reason growers will see a zinc deficiency is when the pH at the roots is too high. Zinc tends to get locked at at higher pH levels, and is better absorbed by the plant in a more acidic root environment.

If you suspect your growing cannabis plant has a zinc deficiency due to too-high pH, flush your system with clean, pH'd water. This will remove any nutrient salts that may be affecting the uptake of zinc and help restore pH to the proper levels.

In soil, zinc is best absorbed by the roots in the 6.0 - 6.5 pH range (although it's generally recommended for soil growers to keep pH in the 6.0-7.0 range, zinc tends to be absorbed better on the lower side)
 
In hydro, zinc is best absorbed by the roots in the 5.5 - 6.0 pH range (although it's generally recommended for hydro growers to keep pH in the 5.5-6.5 range, zinc tends to be absorbed better on the lower side)

Learn how to manage your pH for growing cannabis.
 
2.) Give the Right Nutrients
The truth is, most cannabis growers don't need to add more zinc in response to a zinc deficiency! 

In fact, most growers have actually already given plenty of zinc to their cannabis plants since it is found abundantly in most tap water. If you're using quality soil or cannabis-friendly nutrients, you probably don't need to worry about adding more zinc. In general, zinc deficiencies are more likely to appear when a grower is using heavily filtered or reverse osmosis (RO) water to feed plants since any zinc has been removed, but pH is a much more common reason growers see zinc deficiencies in their cannabis plants.
 
3.) Take Good Care of the Roots
Zinc deficiencies can show up with the plant is having root problems or if the plant is overwatered, even if the pH is right and the zinc is there. Proper watering practices help plants grow healthy and avoid a host of problems!
 
4.) Watch for Recovery
After going through all the above steps, watch to make sure that the zinc deficiency starts to clear up within a few days to a week or so. The damaged leaves may not recover completely, but you know you're in the clear when you stop seeing symptoms on new leaves. 
Last edited by GMO on Fri Aug 30, 2019 4:38 pm, edited 1 time in total.
Reason: Change to gallery images

London Seed Centre   The Cannabis Experts - You Tube
WarnerLiply
Registered User
Posts: 5
Joined: Sat Dec 22, 2018 1:19 am
Location: Panama
Has thanked: 0
Been thanked: 0
Status: Offline

Zinc Deficiency

Post by WarnerLiply »

Teacher would like to perform zinc sulfur experiment. Can anyone help me with this?
What type of zinc do I use, thanks

Post Reply

Return to “Cannabis Deficiencies And Solutions”