All Tips Drying Up

So my plants were doing pretty well on this run until about 1/2 way through my flower (~5 weeks) where my tips started drying up pretty aggressively and I'm not sure what to do.

I grow organic with 1 TBSP each topdressed crabmeal/alfalfa/kelp every 3 weeks. I have an AC infinity which keeps the tent at 80F and 55%RH and Blumat's keeping the soil moist. And a 240W LED at 18" in my 2x4" tent and quite a bit of recirculating fan action.

My best guess is that as I've been lowering RH during the grow I have given the plant too little...but I'm not sure. I don't think it's nute burn since I'm just top dressing organics and not at a crzy rate.

Thoughts? Help? I think I'm not too far from having to chop my grow at this point before it all dries out

I'd be interested in knowing what your runoff PH is? Sometimes if the soil PH is too high or too low the roots will lock up and the plant can't take in nutrients. I know this happened to mine when I over fed one of them. The tips were burnt, kind of like yours. Then, because the soil's PH was off, probably because I kept trying to "fix it" with more nutes, the roots locked up and it couldn't eat and the rest of the leaves were kind of yellowing.

Mine was a soil grow in the veg phase, so I flushed with 6.2 ph'd water until the run off was clear. After that I foiliar fed it slowly re-added nutes to the ph'd water and it eventually bounced back.

I had the same thing happen recently, but it happened after I gave an ill advised major defoliation too late into flower. I assumed I had stressed the plants and caused the die off.
Also my buds wouldn’t finish and I tried to clip off the dead parts of the leaves to keep them from reaching the inside of the buds. I thought I did a decent job but when I harvested there was a lot that I had missed and you can really tell when you break open a bud.
You have to have some sort of lockout…..but it’s gonna take someone with much more experience than myself to diagnose and remedy it. I wish u luck. The buds themselves look great.

I'm a hydro grower so my input may be skewed, but I think your looking at the opposite of overfeeding. They look starved to me. Only 5 weeks and all that yellow?

So we test. When they need watered next flood the hell out of them(2-3x your container volume) with Ph'd water, 6.2 should be perfect, could go as high as 6.8, so you've got wiggle room. Then see what she does. If it gets worse go get her some food. I know your organic so I would suggest Nectar For The Gods, I don't know how many readily plant available organic liquid nutes are out there. I use salts myself. Keep us updated.

Too small of pot,root bound.Dry fertilizer burns all the roots.Its happened to me when I feed dry to small pots.

Just a guess, they do look hungry though.

If PH is under 7.0- then they look low on nitrogen. I would do a soil test for Nitro, Phosphorus and Potassium. They look too low on nitro to me........ but I would stay with them. Those buds still have a lot of potential..........

Are you using smallish fabric pots? If you are then I'm guessing that's probably the problem. The rapid dry out from the sides is causing the available nutes to concentrate in the tips of the leaves. It happened on my last attempt with dry amendments in 3 gallon fabric pots. I wrapped them up in plastic wrap and it seemed to help and now I'm going with 5 gallon pots at a minimum. Most organic guys say you should use plastic pots indoors to avoid the problem all together. Hope this helps.

FirstCavApache64 said:

Are you using smallish fabric pots? If you are then I'm guessing that's probably the problem. The rapid dry out from the sides is causing the available nutes to concentrate in the tips of the leaves. It happened on my last attempt with dry amendments in 3 gallon fabric pots. I wrapped them up in plastic wrap and it seemed to help and now I'm going with 5 gallon pots at a minimum. Most organic guys say you should use plastic pots indoors to avoid the problem all together. Hope this helps.

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wow…that’s good info to know. I’m literally waiting on 4 seeds to pop and was debating on using fabric or plastic pots. Since I’m also going the dry nute route, I think plastic it will be.

Severely underfed. 1 tbsp of top dressed amendments in 3 weeks is not nearly enough. I would pick up a balanced liquid fertilizer and feed them ASAP.

waterproof808 said:

Severely underfed. 1 tbsp of top dressed amendments in 3 weeks is not nearly enough. I would pick up a balanced liquid fertilizer and feed them ASAP.

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It was 1 of each of the dry nutes but point taken. I suppose the feedings should have been accelerating as the flower got later in (of which the brown tips were accerating.

Added some liquid nutes and another round of top dress just now. Fingers crossed.

I've checked runoff and I have good ph but I always found organic in small pots with dry nutes to be hard so I bought 20 gal pots for my next grow, to hopefully solve this issue.

When would be the point of cutting losses with the buds or do I just ride it out all the way?

That's nothing more than a whole lot cannibalizing going on because they are starving!! Top dress with some good organic plant food, like COM stonington blend plant food or other!