Issue in veg stage potassium? Maybe

organfarmin · Oct 25, 2025

So i reused old soil i did put fertillzer worm casting dolomite ect....sat for 3-4 weeks keeping it moist. Decide to try it and issues starting looks like potassium issue but not enough or toxicity. The 9ne in the back left i used some extra potassium and next day went to shits that fast so toxicity?
I don't think the soil is to bad its ph is 6.5 fertillzer kept moist. Here's pics any help would be appreciated. Even the solo cup seedlings are showing signs.

oldskol4ever · Oct 26, 2025

what is the ph of water going in?
what is ph coming out?
always start with ph before adding anything , dolimite is good stuff , but you can over do it .explain your mix.
i reuse soil also but i use crab meal , fishbone meal , kelp dolimite ,worm castings , neem seed meal ,dry malt powder , gypsum , combined with perlite , vermiculite , re used soil ,char

Eledin · Oct 26, 2025

How often are you watering? Do you let them dry in between? The 2 inches method is not very accurate get used to the weight of the pots when theyre dry and when theyre recently watered. One of them either looks very overwatered or with N toxicity on the back, cant see it well.

Eledin · Oct 26, 2025

You didnt feed the ones in the solo cup right? If you did it might be nute burn + too much watering or just nute burn.

organfarmin · Oct 26, 2025

I might have made the soil to hot trying to figure it out.

Eledin · Oct 26, 2025

Most likely hahaha. What are all the additives you used and how much? You have to consider that each one has their dosage but if youre introducing lets say 2 that are high in potassium I use half of each.

Eledin · Oct 26, 2025

Also for seedlings you really dont need much, specially as far as nitrogen goes if you still have old roots in the soil, they will release nitrogen overtime. You can save the ammendments for transplant or use very little and if they get hungry transplant them sooner.

Eledin · Oct 26, 2025

In fact I had problems in the past with nitrogen toxicity and I think it was due to the roots in the soil, since I swaped to 50% used 50% new and I only recollect what is loose once its dry (discarding most of it which is mostly roots) the problem dissapeared.

organfarmin · Oct 26, 2025

I used compost worm castings and gaia fertilizer I'm thinking there was fertilizer left in old soil so I believe I've over done it lolol. Im thinking a little flush just enough to get some nutes outa there.

Eledin · Oct 26, 2025

Yes I think you got a little bit too excited hahaha gaia green is already an all purpose, adding compost on top of it seems a bit too much. In any case what you wanna flush, the solo cups? If so do it but the big pots I dont know, unless they get worse I wouldnt, flushing in organic can give problems.

Eledin · Oct 26, 2025

Maybe I would flush the one with NPK toxicity which is the one that clearly has N toxicity in the back left and also PK burns. The rest have much milder burns.

Eledin · Oct 26, 2025

Also I flush my soil even if I go organic 1 week prior to harvest, I think it gives it a milder smoke, less harsh for the lungs. Might just be me but in any case I get rid of most of the nutes before reusing it.

organfarmin · Oct 26, 2025

Yea i was gonna try the flush at the end of this grow. I'm definitely flushing lol.

Ninjadogma · Oct 26, 2025

Whenever I see something going on at the tips or edges it's usually an over I ran into, not an under. If you reused soil from a plant you took across the finish line, it might be a little hot on potassium or light on magnesium. You can purge some of the unbalanced load with a few heavy waterings and put a better ratio in behind it via amendments or liquid feeding. If you're recharging your buffers you probably know to do that with your mycos and microbes too. So I guess I'm thinking what you're thinking there. Just be sure and collect data. While you can't see the ratio without some analysis, you can make sure EC and pH are sitting in a good range and you can monitor and confirm the drop for the changeout while you're doing it.

organfarmin · Oct 26, 2025

Yea I just went down and did a heavy water see how that does little by little I don't wanna flush them totally. Try to keep a little something in the soil.
Now after I do the heavy waters and see that there back to normal do you think I should put some fish shit or recharge back into the soil?

ChairmanFester · Oct 26, 2025

Repot in a soil bag. A water cycle might do it even less than a flush, but bags flush safer than a pot. With a repot you'll tone down the soil too.

Issue in veg stage potassium? Maybe

Issue in veg stage potassium? Maybe

organfarmin

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