Zinc Deficiency In Marijuana Plants

November 25, 2019

Zinc is necessary the proper growth and overall health of your marijuana plant. Zinc affects the strength of all parts of the plant such as the stems, branches, stalks and leaves. It is also a necessary element in many enzymes and a certain growth hormone called, auxin.

When plants don’t have the right amount of auxin the leaves and shoots will not grow. Zinc is also a major player in producing chlorophyll.

These deficiencies are similar to manganese and iron deficiencies, accept that they influence new growth, causing them to become motionless. Zinc deficiency happens sometimes and usually is a result of the leaf blades becoming knotted and tangled. The buds can also get tangled as well.

Signs of a zinc deficiency

Chlorosis as well as the old and new leaves turning yellow between the veins are sign of a zinc deficiency. The newer leaves will begin turning yellow between the veins. The tips of the leaves will have distorted colors and begin to die.

The plant will no longer grow upward. As a result there is not as much space between the newer nodes and this will make the new leaves get tangled. If it is producing buds the flowers will begin to die.

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The plant will usually have a dull feel to it. It is a rare occurrence for a marijuana plant to have too much zinc, but if it happens it will cause withering and possibly kill the plant. Not sure if your plants have a zinc deficiency? Read the article Nutrient deficiencies in marijuana plants for a list with pictures of all deficiencies.

How to fix a zinc deficiency

You can resolve zinc deficiency through implementing a micro mix compound containing zinc, iron and manganese. You can also try zinc sulfate (wiki), zinc oxide and chelated zinc. Another option is an excellent product such as Marijuana Booster, which gives your plant plenty of the variety of nutrients it needs, including zinc.

Also, flush your system with pure, pH water that has almost half of the necessary nutrients for your plant which will include, manganese, zinc and iron. Pay attention and give it a few days to fully recover on the new growth.

List of marijuana plant symptoms

Leaf Color: 
  • Yellow Leaves On New Growth
  • Yellowing Between Veins
  • Speckled / Patchy Pattern

Leaf Symptoms:
  • Upper Leaves / New Growth Damaged
  • Leaf Tips Appear Burnt
  • Leaf Tips Are Dying
  • Yellowing Between Veins
  • Speckled / Patchy
  • Slow Growth
  • Non-vertical Growth
  • Leaves Curl Under

Plant Symptoms:
  • Slow Growth
  • Leaves Curl Under
  • Too Short

Other Symptoms:
  • Buds Not Getting Heavier

Plants with strong genetics have less change of getting sick. Make sure you buy marijuana seeds from a trusted seedbank. Thanks for reading. Please leave comments or questions below and don’t forget to download my free grow bible


The founder of I Love Growing Marijuana, Robert Bergman, is a marijuana growing expert that enjoys sharing his knowledge with the world. He combines years of experience, ranging from small-scale grows to massive operations, with a passion for growing. His articles include tutorials on growing... [read more]


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  1. By Symptom Checker – Identify Marijuana Plant Problems ,24 Jul 2015
    […] Zinc deficiency […]
  2. By Olfa ,27 Aug 2015
    I needed to certae you this little observation to help thank you very much as before for all the marvelous views you've shown on this page. It's quite extremely open-handed of people like you to supply unreservedly precisely what many […]Read More
  3. By What Do Marijuana Plants Need? ,23 Oct 2015
    […] only occur in small amounts, especially when compare to the macronutrients. Micronutrients include zinc, copper, iron, boron, manganese, and molybdenum. A good option is the Marijuana Booster. A great […]
  4. By Jj ,12 Sep 2016
    Why would somebody give you free free seeds for some dick reason like that. What a prick
  5. By lemmen water ,08 Feb 2017
    im looking for that KK. help son
  6. By Ray ,10 Mar 2017
    I hope this is not the mind set of this community.
  7. By Pp ,23 Sep 2019
    If you have 8 PH tap water and more 25 Celsius degrees temp you have to supplement zinc no way if you use soil, I empirical use zinc citrate ( zinc anode and carbon or silver anode in a satured […]Read More
  8. By Pp ,23 Sep 2019
    Obviously you have to correct pH under 6.8 all time
  9. By Johnny ,15 Apr 2020
    Plant is 10 inches tall seems to be turning yellow
  10. By john ,31 Dec 2020
    I'm not sure when I am experiencing is a zinc deficiency it is only the very tips new leaves that are showing a tiny amount of yellow it is on day 13 of flower the plant looks gorgeous except for […]Read More
    1. By Stephen ,24 Jan 2021
      THe light might be to close to the top of the plant

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