What's happening here?

Hey there!! Fought some overwatering issues a few weeks ago, everything seems to be bouncing back okay. But now I've noticed this happening to the sides of a few leaves, wondering what is going on? Temps are nominal about 75-77, humidity is around 40-50% goes up a bit more after waterings. I have a small circulation fan going, a 4 bulb t5 that I had about 6 inches above, raised to about a foot because they didn't seem to like how close it was. Seeing what happens there. I've but them in a half and half mix of promix with micos, and Gaia green living soil blend. Watering once the soil dries out, not too dry but dry enough. Is this overfeeding due to the living soil? Heat stress? The sides of a couple leaves looked like they were curling up but that as since going away...trying to narrow down every possibility. Please help! Thanks in advance. I've posted the ingredients list of the Gaia green soil, other than those two leaves (one on each) developing that brown, dying look on the side of them, I don't know what else it could be? Anything that they need that I'm not giving them? Should I raise the light for till they adjust to it properly? Any info is appreciated. Thanks!

My guess would be lacking potassium. That would usually be the cause of yellowing only at the edges/tip moving inward. From a couple pics, it seems that nitrogen may also be a tad much. Too much nitrogen would cause potassium to be locked out, even if it is in your medium. Just my thoughts.

Blitz35 said:

My guess would be lacking potassium. That would usually be the cause of yellowing only at the edges/tip moving inward. From a couple pics, it seems that nitrogen may also be a tad much. Too much nitrogen would cause potassium to be locked out, even if it is in your medium. Just my thoughts.

Click to expand...

Will they bounce back just fine you think? Did you look at the soil ingredients? Is there nothing that would have potassium in it already?

Blitz35 said:

My guess would be lacking potassium. That would usually be the cause of yellowing only at the edges/tip moving inward. From a couple pics, it seems that nitrogen may also be a tad much. Too much nitrogen would cause potassium to be locked out, even if it is in your medium. Just my thoughts.

Click to expand...

And what's a good potassium supliment? Obviously I wouldn't want to give anything but that. Thanks for the info so far btw, if you come up with anything else let me know

Blitz35 said:

My guess would be lacking potassium. That would usually be the cause of yellowing only at the edges/tip moving inward. From a couple pics, it seems that nitrogen may also be a tad much. Too much nitrogen would cause potassium to be locked out, even if it is in your medium. Just my thoughts.

Click to expand...

I've looked it up and you seen to be right! What would you suggest to remedy this? As they were just transplanted a week and a bit ago, and are in this soil mix now that I wouldn't want to flush, paid good money for the Gaia green and would hate to flush all that good stuff out so soon...that's all I have to ask for now lol sorry to bug yuh mate

no worries, sorry was at work, i dont log in here from work Im not familiar with the ingredients of your medium, but it sounds like good stuff from the quick view i had. The only thing i know of, besides pure potassium, would be silica, that is generally potassium only and the one from gh is a 0-0-4..though you cant add too much. i dont have experience with your growing medium, so i cant say how adding just 1 element will react in the longrun. Everything has to be kept in balance..too much of one thing will hurt the availability of another element due to locking it out. You don't need to flush as you're not dealing with a major toxicity and you likely don't have a 'salt' buildup yet. You just have to lower the nitrogen going in by a small amount for now, and slightly increase potassium. There should never be more nitrogen in your medium than potassium, as the latter is the one the plant uses the most and is marijuana's 'favorite' food!

Yeah, im having the same issue i think. The leafs are growing super freaking fast, so i thought it might be just a mutation from not maturing for the light fast enough, lol. huh

Then, i though maybe not enough Cal-mag,

InTheValley said:

Yeah, im having the same issue i think. The leafs are growing super freaking fast, so i thought it might be just a mutation from not maturing for the light fast enough, lol. huh

Then, i though maybe not enough Cal-mag,

Click to expand...

Calcium and magnesium are two different elements, no such thing as a cal-mag shortage, unless you're using RO water with no supplements. Absolutely nothing in those pics points to either a calcium or magnesium shortage. Not sure what led you think one or the other, or both would be missing. Seems to be a common thing in forums..no matter what the issue seems to be..people always think adding cal-mag is the miracle fix to all, it's a bit misleading

lol, Yeah, tell me about it,lol..

I think Im just not feeding her enough. Im in Cocoloco and using MegaCrop. Really didnt want to rampup the nutes in the cocoloco, because I ran a tested 1400ppm with just water on runoff. I just flipped 4 days ago, so will probably step it up.

So, no calmag issues? lol..

I think Im actually having PH problems maybe. Im using MegaCrop, but dont have a PH meter, so going by the Liquid PH test, and thats a crapshoot.. Might have to change back to AN-PH perfect so i dont ruin this plant.

Pics are a bit too zoomed in and the entire plant is not visible, but no, i dont see anything of a cal or mag shortage. Possibly too much nitrogen from the pics, but again, hard to see properly.

peachezNchron420 said:

Hey there!! Fought some overwatering issues a few weeks ago, everything seems to be bouncing back okay. But now I've noticed this happening to the sides of a few leaves, wondering what is going on? Temps are nominal about 75-77, humidity is around 40-50% goes up a bit more after waterings. I have a small circulation fan going, a 4 bulb t5 that I had about 6 inches above, raised to about a foot because they didn't seem to like how close it was. Seeing what happens there. I've but them in a half and half mix of promix with micos, and Gaia green living soil blend. Watering once the soil dries out, not too dry but dry enough. Is this overfeeding due to the living soil? Heat stress? The sides of a couple leaves looked like they were curling up but that as since going away...trying to narrow down every possibility. Please help! Thanks in advance. I've posted the ingredients list of the Gaia green soil, other than those two leaves (one on each) developing that brown, dying look on the side of them, I don't know what else it could be? Anything that they need that I'm not giving them? Should I raise the light for till they adjust to it properly? Any info is appreciated. Thanks!

Click to expand...

Looks like you have a bit of heat stress going on and as the damage is limited to just a couple leaves I wouldn't worry about it too much.

6" is about where I keep my T-12s above young seedlings but try to keep them an inch or two once they are as big as yours so I doubt that's the problem. I run my 400w HIDs at 8" to a foot but have a small fan blowing between the canopy and the light(s).

Do you spray anything on your plants? That damage looks a lot like it's from moisture which can brown out leaves easy enough. Just one leaf draped over another can trap moisture in between and the lower leaf will turn all brown in just a day. Leaves breathe through their undersides so it's the lower leaf that takes the hit.

@InTheValley As you initiate flowering the plants go into overdrive and many strains start growing weirdly shaped leaves and even single-bladed ones that will be all you see as it grows from there. I don't see any signs of deficiencies nor nute burn on a couple of the older, normal looking fan leaves in your pics.

The leaves are very dark green which can be normal for some strains but usually indicates that you are feeding close to the edge of too much. If they have had lots of P and K already I'd skip a feeding and see how it goes. First sign of low nutes is the oldest, lower leaves starting to yellow. Low N a general fading of the whole leaf surface, Low Mg, the edges and between the veins yellow first. Both of those are mobile nutrients and will be stolen by the rapidly growing tops really quick.

If your pH is way out of whack you'll see deficiencies in the newer growth first as micronutrients get locked out. Here's a handy reference chart for sussing out what's going on.



Good luck to the both of ya!

InTheValley said:

I think Im actually having PH problems maybe. Im using MegaCrop, but dont have a PH meter, so going by the Liquid PH test, and thats a crapshoot.. Might have to change back to AN-PH perfect so i dont ruin this plant.

Click to expand...

All I use for base nutes is pH Perfect 3-part and have for years. Works great in soil/soiless and DWC and I never bother checking pH. Starting to think I don't use enough.

In pots I only use peat based mixes as I had no luck with coco 15 years ago tho I hear it's better now. ProMix products are all that's available in my area and HP is my fave. The Veg and Herb mix vegs plants just fine on it's own with some added perlite but the HP is loaded with lots of that and works great right out of the bag.

I only use RO or distilled water so don't have to worry about water when problems show up. Gotta be something else.

OldMedUser said:

All I use for base nutes is pH Perfect 3-part and have for years. Works great in soil/soiless and DWC and I never bother checking pH. Starting to think I don't use enough.

In pots I only use peat based mixes as I had no luck with coco 15 years ago tho I hear it's better now. ProMix products are all that's available in my area and HP is my fave. The Veg and Herb mix vegs plants just fine on it's own with some added perlite but the HP is loaded with lots of that and works great right out of the bag.

I only use RO or distilled water so don't have to worry about water when problems show up. Gotta be something else.

Click to expand...

I use the herb and mix one as well and i love it, though after almost 2 years of using it, its time for a new batch lol..the mychorrizae i think gets depleted by now. You say you use the hp version? I thought many people said not to use the high porosity one? I kept reading that people say to use the bx or mp version? Spring is coming so im looking at diffrent soils to get to try something else for once..though i loved the organic vegetable and herb one.

Blitz35 said:

I use the herb and mix one as well and i love it, though after almost 2 years of using it, its time for a new batch lol..the mychorrizae i think gets depleted by now. You say you use the hp version? I thought many people said not to use the high porosity one? I kept reading that people say to use the bx or mp version? Spring is coming so im looking at diffrent soils to get to try something else for once..though i loved the organic vegetable and herb one.

Click to expand...

Are you planing to do most of your growing outdoors?

I used to use Sunshine Mix #4 with extra perlite added by me but HP has more than enough. If I mix the HP with Veg&Herb 50/50 I don't add any perlite and it's fine. Both are organic certified so a great base to grow in no matter which way you want to go later.

As far as the myco part of it goes, I don't even care about that as I'm still using off a 4 year old bale of HP that has sat in my carport going from 35C to -35C for a few years so any decent fungi will be dead by now.

No..strictly indoors. I liked the myco as the plants really seemed to grow very nicely with it. The spores are very resistant and even without roots, they will survive for many years..2 for sure. I cant get sunshine or ffof or happy frog north of the border..pro mix is my best choice