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Yellow tips spreading to inside, outdoor organic grow

Discussion in 'Plant Problems: Pests, Disease & Deficiencies' started by stomatasf, Aug 7, 2018.

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  1. #1 stomatasf, Aug 7, 2018
    Hi there,
    I'm growing all organic. I have about 3 plants that started having very bright yellow tips on their leaves. It was just on tips and the rest of the part of leaves was fine. Now on one of the plants its spreading.

    I'm growing in organic potting soil all amendments pre mixed in.
    Most of my garden is fine no issues with the other plants. One soil I amended myself and the other I purchased all organic and its been great.

    One of the plants went from just having yellow tips to yellowing on outside margins and now its moving inward in the leaf. Its affecting lower, middle and top of the plant. Any idea what this could be? My waters pH up to now has been in the 6 to 6.5 range and its well water. The plant that is having most the issues and in the photos is in a 30 gallon smart pot. My other plants are in 300 gallon. Any ideas?
     

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  2. #2 PoiBoy79, Aug 7, 2018
    Is the 30 Gallon pot filled with the soil you made or bought?

    If it's the one you built did you add a liming agent?
    The fact it has moved up the plant means its a mobile nutrient that is deficient or being locked out. By the looks of It, probably a K (potassium) issue.

    *edit, saw that you use well water - have you seen the report?

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  3. #3 stomatasf, Aug 7, 2018
    Hi PoiBoy79,
    This soil was purchased. And yes I’m sure he would have used a liming Agent. He’s a reputable soil person. After looking at pics last night, potassium’s seems logical but I’m not sure. I’m thinking of adding some kelp? Any suggestions?
     
  4. #4 PoiBoy79, Aug 7, 2018
    I ask about the liming agent because most purchased soils do not have enough lime. As organic gardeners we add a lot of organic matter which creates acids and you need the calcium carbonate to interact with it and prevent ph swings that can cause deficiencies to present. Usually just makes for a smoother ride. That and canna likes it's calcium. It wouldn't hurt to inquire a bit on the make up of his soil.
    Kelp and Alfalfa are good sources. Make a tea and foliar spray to get it in there faster. I also use langbeinite because it's stronger stuff 0-0-22 and also provides sulphur and magnesium. If you use that you can topdress and scratch it in or I allow it to dissolve in water and make a tea/foliar.
    All said and done that's a nice looking plant and it'll be a good amount of smoke.
    Best luck!


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  5. #5 stomatasf, Aug 7, 2018
    First of all thank you for the info! Do you think adding oyster shell might help? I know its slow acting... and if it is a pH swing will alfalfa and kelp help without adding some sort of calcium carbonate?
     
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  6. #6 PoiBoy79, Aug 7, 2018
    No problem, anytime I can help [emoji106]

    Alfalfa and Kelp both contain calcium,but not in the form you need for ph buffering.
    Oyster shell, Calcitic Lime (aka garden lime, ag lime), and Dolomite lime are all rich sources of calcium carbonate. The surface area is directly linked to speed of availability, so find the powdered form (flour) or the pelletized is acceptable.
    I'd stick with either OS or Garden lime since Dolomite contains a high level of magnesium and adds another consideration you wanna stay away from right now.
    Topdress and scratch in at 1 Tbsp per gallon soil mix then water in good.
    Happy gardening!


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