what's up with my leaves?

Okay, so here's a new one (problem) for me: I just got back from being out of town for almost a week. Had a buddy watching my shit for me, and when I returned I noticed that one of my plants has some weirdness going on at the leaves.

From what I've read, it looks like a text book calcium deficiency but it might be something else. It was mainly just the part of the plant that was right under the light, not the other side. Brownish/goldish/tannish spots at all the tips along the "serrated" parts of the leaf:



More pics in a minute

How old are your ladies?

They were vegged for 2 months and about 10 days, and honestly I never really keep count in flower, I just kind of go by the look/pistils/trichs etc. but based off of my count (which was started a few days late I'm pretty sure) it's about 2 weeks in flower. So it might be like 2 and a half weeks but they haven't been in flower longer than that.

Here's a couple more

yea it looks like calcium deficiency you can see the slight color difference on the edge of the leaves

Yep, get 'em some calmag quick.

Jack Harer said:

Yep, get 'em some calmag quick.

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I'd have to disagree with this diagnoses. Calcium is a Immobile Nutrient, basically it stays in the original place of older leaves and doesn't travel to other growing areas. Looking at your pictures, I'd have to say you have a Potassium deficiency. A Potassium deficiency starts at the tips of the leaves. Potassium Nutrient is a Mobile Nutrient that travels from one part of the plant to another.

So im wondering what youve been feeding, how much, how often? Soil type, cummon thor, you know better than this. Were not mind readers here. To me it looks like nute burn. Crispy tips, saw tooth, burnt tooth ends even, daaaark green color. So now you have three different conclutions cause you gave no details. And what are you doing not having calmag. Thats some 101 shit right there. At least you coulda ruled that out. Idk man, maybe another picture and some details and we can narrow it down.

There is no deficiency there my friend. Don't give it anything you have already given it too much. Its nute burn. I suggest you flush the shit out of it let it dry out and then water with 1/4 strength nutes and you will be fine. Good Luck

K so i whipped out that leaf chart thingy for the first time in months and its like a tie from what i see. Calcium, potassium, or maybe nute burn. Good answers all around by the fellow growers but a big fat fail by you thor for no info. Whats the fertilizer youre using have for npk values and what kind of substrate are you in?

Prince Albert said:

I'd have to disagree with this diagnoses. Calcium is a Immobile Nutrient, basically it stays in the original place of older leaves and doesn't travel to other growing areas. Looking at your pictures, I'd have to say you have a Potassium deficiency. A Potassium deficiency starts at the tips of the leaves. Potassium Nutrient is a Mobile Nutrient that travels from one part of the plant to another.

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Right, do if mobile elements can move from.healthy old growth to deficient new growth, then the deficiency would show up on the bottom. And immobile elements cannot move from older healthy material, so the deficiency shows up in the new growth up top, which is where this one is showing up.

And alienwidow, I think you might be right, if it isn't a deficiency than its overfeeding. I'm running the roots organic master pack (minus big swell synthetic, replaced with kool bloom by GH) but lately I've been alternating feedings between the organics and my hydro nutes that I'm using for my aero--botanicares KIND line. I will throw a feeding of the sy thetics in every once in a while, but last time they were watered was Tuesday, and that was a flush so I would think if the synthetics burned it then it would've shown up a little sooner. I went pretty heavy with the organics last feeding tho, so maybe it was creeper burn from that

Only the areas near/under light huh. Looks and sounds like slight nute burn too me. That certainly is not a calcium deficiency.

Also, soil grow (mostly Scotts soil this time) in 5-7 gallon smart pots. I usually will flush, then 3-4 days later feed with synthetic (about 1 gallon per plant, at around 8-900 ppm), then 3-4 days later feed like a half a gallon of roots organics mixed at around 5-600 ppm, then a few days later when the pots are fairly light I'll flush them with almost 2 gallons a piece of pH'd water.

The next time I feed I'll switch them--feed organic first with a heavier concentration (like a gallon), then a few days later a half gallon of a weaker synthetic, then a few days later flush.

So I mean I've definitely been pounding the nute regiment, but haven't had any burn up until now. And like I said its just one part of one plant, all the others are nice and healthy.

Thanks everybody for the answers, I hope its not nute burn bc they were so thirsty from me being gone that I went ahead and fixed a feed for them with cal mag and some bloom formula at about 800 ppm. I guess I'll pay attention to them today, see if they are becoming shocked or anything. At the soonest sign of stress tho I'm flushing the shit out of those things.

This was my first time into flower without having all of my tops yellow out in the beginning, I should've known something would be up.

Kk so i think i may have solved it. Your using somthing called the "master" pack....and you are not masterfull lol ok no but seriously, if your using 5-7 gallon smart pots which is what i use as well then you need to be adding more than a gallon of water to them at your waterings. Im doubting that those containers have any run off from only a gallon of water. I know mine dont. Sooo, you keep adding the master pack and the master pack has no where to go because your not getting run off so it stays in the.........root zone. This causes build up, which in turn can cause .........lock out. This also can happen if theres no where for the run off to go and it collects in saucers and then is reabsorbed into the plant again. If you want to test to see if this is the case just take the ppm of the water comming out of the plant after a watering. If its at around 3000 ppm then this probably is the problemo kiddo.

Yeah, I usually don't have too much run off but often times I do. When I flush I use ten gallons between the five and there's definitely runoff, but again I'm using saucers under the smart pots so any run off gets soaked back up. I wish there was a good system for being able to water your big plants and collect the runoff. I'm thinking of building a big table that's like 6 inches off the ground to cover the bottom of my tent, so I could drill a hole in one corner and collect runoff.

I have pieces of 2x4 under my 7 gallon smart pots, 4 per container between the smart pot and the drip catching saucer. That way when i water them almost 2 gallons every time, ill have about 10-15% runoff and it all just evaporates because the plants elevated. It never reabsorbs so your actually leaching salts out everytime which is just what you want.

Oh and if your looking for a lower humidity option to dealing with run off theres always the noisy ass shop vac. Just dont forget too empty that biotch or shell start to smell like hookers vajayjay

The shit starts out at the leaf margins, affecting the tips of the serrations at first. Within a week it looks like this:



There is no "fading out", or chlorosis that would give one time to react, all at once the leaves turn crispy and brown at the margins and spreads into the leaf the further it progresses. No brown spotting inter-veinally to speak of. It happened to me twice!!! It is an Mg deficiency in my opinion, but to correct that one needs to add Ca as well. It could be that a lack of Ca (or an overabundance ) could be locking out Mg

Alienwidow said:

Oh and if your looking for a lower humidity option to dealing with run off theres always the noisy ass shop vac. Just dont forget too empty that biotch or shell start to smell like hookers vajayjay

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Never could put my finger on it about you. But now it's crystal clear...you watch Oprah.

Alien, that's actually a really smart idea with the 2x4's. I'm surprised it came from you, knuck knuck. I'm gonna have to try that.

And jack, yeah that looks identical to what I have going on, it out keeps progressing. I guess we'll see what happens. Shouldn't take long to figure out if it's deficiency or toxicity.