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  • Nute burn or nute deficiency?

    Posted by mrzulu on April 4, 2021 at 2:29 pm

    Hey Gromies-

    I am growing a single Dark Start in a space bucket and running the Fox Farm basic nutrient plan. I am in week 6 of the 10 week flower period, and I’ve noticed a couple things that I am concerned about, and I was hoping to have some more experienced eyes on it. Full disclosure- I’ve also been flushing for 2 days with pH balanced water too, as my first thought was just nute burn.

    So my thought is that, given the deep green color and some of the curling of some mid plant leaves that I have/had a nitrogen abundance/ borderline nitrogen toxicity … I have some burnt tips (which I think came earlier on when I overfed a touch), but I’ve also started to notice some small brown spots appearing area the main vein of the leaves. Could I have an abundance of nitrogen but also a manganese and/or potassium deficiency at the same time despite no yellowing?

    And one more question- once I fix the issue, I know the burned tips won’t heal, but will the brown spots in the mid leave heal or no? Just curious how to gage the progress.

    I’d love your thoughts and advice. Thanks all!

    oneeyedcatcannabis replied 3 years, 2 months ago 3 Members · 3 Replies
  • 3 Replies
  • jacker14

    April 4, 2021 at 7:47 pm

    I am having a similar issue but my plants are in week 6 of an 8 week schedule. At first I thought it was spider mites and I began researching the nearest places to get a CO2 setup. While digging into more research and letting a couple days go by, I came to the conclusion that the spots starting in the centers of the leaves was nutrient deficiency. Because you still have 2-3 weeks until flush, I would suggest increasing the P and K in the water your feeding them with or if your using dry amendments simply add a quarter to half feed top-dress.

    My plants have had burnt tips since the beginning of flower. I read the burnt tips were nitrogen toxicity and not to worry about that in bloom as the plant needs those vegetative nutrients to continue producing large fan leaves that absorb the most light and hold the most reserve nutrients when flushing.

    All research based advice as I am not an experienced grower.

  • mrzulu

    April 4, 2021 at 9:31 pm

    Thanks for sharing the research jacker14! I really appreciate it!

  • oneeyedcatcannabis

    April 18, 2021 at 10:35 pm

    It looks like it could be a calcium deficiency or a potassium toxicity. but would need to know more about the grow to really tell. The brown spots won’t heal, the best why to tell if the plant is improving is to look at the new growth. good luck small grows can be hard.

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