Help w/ Mg issue

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  • Deficiency: This is pretty easy to notice, green veins but fully yellow leaves. leaf tips can discolor and curl upwards. leaf edges can feel dry and crispy. the necrosis on the leaf will start at the edges, work all the way around the leaf. the tips will twist and turn, then the leaves will fall off without withering. *mag def is common with too acidic pH*​
    
    
    
    

  
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This is exactly what I have going on with a few of my vegging plants right now, twisting leaves and yellowing at the tips in. Needs some help with finding the problem. Growing in 8" coco pots with FFOF soil, watering with RO water no nutes since when I started the first dose the plants got nute burn FFOF is hot soil. Ph of RO water is 7.0-7.4 when I tested it last night.

Adding some epsom salts to your nute mix will boost Mg. At that pH the plants should be able to uptake the Mg.

Should I just switch to tap water? I dont like tap water though. I have liquid Mg.

If you are using RO water, add some cal mag to your water.

Yeah I always add CaMg+ to my water but with the burn I was doing a flush this week.

Ok Ph after nutes 5.7 perfect. Then I broke my ph probe's sensor I just bought the dam thing!

Get a ph pen it covers the probe unless you need the big long probes for something else . Anyway the PH is still wrong and def will come back. Make sure all waterings and feeds are 6.5 for soil.

Yeah thats what I have is a Ph pocket pen. The seller is going to replace it for me. How is 5.7 wrong? Every source is saying 5.5-6.5. I will not have a new Ph pen for at least a week.