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Thread: Discoloration of leaves

  1. #1

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    Default Discoloration of leaves

    Hi

    I'm a total newbie at this, had a bunch if seeds that I've collected over the years and finally thought I'd test some of them out, wich has now resulted i 7 plants of unknown strains. They are all looking good, just bought some local flowering soil, 600w led lights, made a box with fan in and out with a coal filter, and adding the TriPart flora mix as recomended on the labels there, also adjusting the ph value ofc as i mix, and regulary checking the soil. But, on one plant now, over the last week, some of the lover leafs are showing some discoloration.. started with som tiny bronze looking dots along the center of the leaf, and was afraid of spidermites, but been looking with a magnifier everyday and thoroughly, and cannot find any, also, it is consentraded to the lower leaves of one plant only, and no webbing.. and now the tips are yellowing/browning some too.. rest of the plant looks otherwise fine and healthy with my eyes. Thinking it is a nutrient deficiency or owerload of some kind, and hoping someone can identify the problem easily.
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  3. #2

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    We really need some better pictures under natural light, but it looks like you have thrips. If you have them, they are tiny little white slug like things that will eat little pinprick holes in your leaves. they will even eat trails through your leaves if you leave them around. They come from the soil in your pot they will continue to come from the soil for the rest of your grow unless you get rid of them.

    I'm not 100% certain, as I said we need better close-up pictures of the bottom of the leaves and natural light.

    The thrips on the plant are easy to kill I prefer SM90 if it's available in your area, in the soil you want to just try and stop them from getting in in the first place. So what I use to keep bugs out of my soil or even cocoa is clay pebbles over the top of my soil. They must be super washed because they are alkaline will throw off your pH. You can also water SM90 in with your nutrient mix at the rate of about 2 mil per gallon.

    In the future, if you have problems with bugs in your soil before you start you can mix in some mosquito bits, I understand that they're expensive as hell right now and most of Europe and the UK. Must be too many people trying to grow right now.

    There are other things you can use, I just like these better.

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    Thanks for taking your time I thought about them too, but cannot find anything crawling at them att all, and I've been turning every leaf with a magnifier.. was thinking maybe magnesium deficiency? Dont want to add or do any actions before Im somewhat certain, dont want to create a new problem. Talked to a pest guy at an online store, and he said the sympthoms could sound like trhips or mites, but that I should be able to see them too, and find tiny black droppings, wich I have not.. adding a few more pics, maybe they help ^^
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    Okay, I see what you're talking about now. I really wouldn't worry about those little spots. I also wouldn't bother with the pH on plants grown in soil.

    Those plants look a little bit thirsty but otherwise they seem just fine.

    Yeah when you have spider mites the underside of your leaf has got all kinds of crap on it it's obvious something's going on and thrips yeah they're moving around you can spot them if you look real close, but you don't have either one of those.

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    If that is the case I am very relived, thank you so much! Can also mention tho, just thought of it, just before this, I did a flush, as I read somewhere that after a few waterings with nutrients, one should flush it in order to prevent build-up of nutrients.. but don't really feel it was a good thing, and later read that one shouldn't do it until a week or 2 before harvest.. any inputs on that?

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    Usually when I feed soil what I like to do is feed one time and water two times, then start the process again. If you always get good run off out of the bottom of your pot say 20%, you should never need to flush unless you overfeed.

    The proper way to water a plant is to give it a little bit of water move on to the next plant a little bit of water and keep going back and forth a little bit at time until you get it running out the bottom and then give it some more.

    The way the veins are standing out on those leaves your plant is either thirsty, over watered, or stressed from something else. I believe thirsty, so you never want to feed a thirsty plant. I will actually go into a thirsty plant on a hot day and give it some water wait a couple hours for it to recover and then give it some nutrients. Just a thought

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    Thanks a bunch man, much appreciated! Will keep that in mind ^^

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