why do a couple plants do this every grow

imgrowing · Sep 16, 2025

every grow lately i've had 1 or 2 girls do this. at first i thought calcium but adding calmag did nothing. then i thought lockout because i feed full strength GH flora grow at 1150 ppm.
so after that i tried half strength and feed water water routine, but no change.
pro mix hp with ph'd feed, temps and humidity are premo, not over watering etc etc. several grows with exact same routine with no issues except lately.
all from seeds as there autos.
any idea why 2 or 3 out of 10 or so would do this?
just different seeds react different?

RoadKillSkunkHunt · Sep 16, 2025

imgrowing said:
every grow lately i've had 1 or 2 girls do this. at first i thought calcium but adding calmag did nothing. then i thought lockout because i feed full strength GH flora grow at 1150 ppm.
so after that i tried half strength and feed water water routine, but no change.
pro mix hp with ph'd feed, temps and humidity are premo, not over watering etc etc. several grows with exact same routine with no issues except lately.
all from seeds as there autos.
any idea why 2 or 3 out of 10 or so would do this?
just different seeds react different?

Looks to me to be mostly at the top of your plants. The further down you go, the better things look. I'd turn the light intensity down if it were mine. You may find out its been over-fed afterwards but turning your light down gives you a chance to mitigate the damage while you work through the other issues.

HighRollin4 · Sep 16, 2025

Sometimes I feel like it’s just the plant itself sometimes I had two of the same strains grow and they both required a lot of different needs due to deficiencies or just responded to nutrients better than others. I start to understand cloning a lot more, the more I grow hahaha but I would keep doing what you’re doing with the cal mag every other watering. Some plants are just a pain

RoadKillSkunkHunt · Sep 16, 2025

HighRollin4 said:
Sometimes I feel like it’s just the plant itself sometimes I had two of the same strains grow and they both required a lot of different needs due to deficiencies or just responded to nutrients better than others. I start to understand cloning a lot more, the more I grow hahaha but I would keep doing what you’re doing with the cal mag every other watering. Some plants are just a pain

I've been growing for quite a while. Long enough to know how to keep a plant happy from start to finish. That doesn't mean every grow goes perfect. None really do. There's always something that could be improved. When it comes to cal-mag, I use it after my plants have been switched to flower. I use epsom salts during veg so I don't risk too much calcium. This works for me because I grow in soil, my water is hard and without this adjustment, I would frequently have calcium created lockout mid flower on. The trick is learning how everything in your own grow room reacts with each other. All environments are different.

THCosmic · Sep 16, 2025

RoadKillSkunkHunt said:
Looks to me to be mostly at the top of your plants. The further down you go, the better things look. I'd turn the light intensity down if it were mine. You may find out its been over-fed afterwards but turning your light down gives you a chance to mitigate the damage while you work through the other issues.

Yeah, my first thoughts are light or heat as well.

@imgrowing You mention temp and humidity are good, but what are the exact ranges you have been dealing with? If they are ideal, then light intensity as mentioned by @RoadKillSkunkHunt is the most likely culprit.

HighRollin4 · Sep 16, 2025

For example these two are the same strain from the same batch but are completely different. The one on the right suffered nitrogen and calcium issues and the buds are less potent so I’ve come to the conclusion that some are more prone to deficiencies and need a lot more care. The one on the left needed little to no care and did amazing.

THCosmic · Sep 16, 2025

imgrowing said:
any idea why 2 or 3 out of 10 or so would do this?
just different seeds react different?

This could very well be it. We have so many strains today because seeds, even from the same strain, can differ so much. Then those differences are selectively bred with other specific differences to give us our massive array of strains to choose from.

HighRollin4 · Sep 16, 2025

RoadKillSkunkHunt said:
I've been growing for quite a while. Long enough to know how to keep a plant happy from start to finish. That doesn't mean every grow goes perfect. None really do. There's always something that could be improved. When it comes to cal-mag, I use it after my plants have been switched to flower. I use epsom salts during veg so I don't risk too much calcium. This works for me because I grow in soil, my water is hard and without this adjustment, I would frequently have calcium created lockout mid flower on. The trick is learning how everything in your own grow room reacts with each other. All environments are different.

That’s true man, I’ve had a lot of runs myself and sometimes I still beat myself up in terms of expertise but no one’s perfect especially in nature. I’m 100 percent aware things can and will go left, that’s what I love about horticulture, the endless possibilities. Keep it up tho bro

RoadKillSkunkHunt · Sep 16, 2025

HighRollin4 said:
For example these two are the same strain from the same batch but are completely different. The one on the right suffered nitrogen and calcium issues and the buds are less potent so I’ve come to the conclusion that some are more prone to deficiencies and need a lot more care. The one on the left needed little to no care and did amazing.

What are you using as your grow media. If you already said it, I'm sorry ... I'm old and stoned so I can be forgetful. lol Also your nutrients and nutrient routine. One plant is thriving. The other looks mal-nourished. Everything else is the same ... right? We'll find it.

HighRollin4 · Sep 16, 2025

RoadKillSkunkHunt said:
What are you using as your grow media. If you already said it, I'm sorry ... I'm old and stoned so I can be forgetful. lol Also your nutrients and nutrient routine. One plant is thriving. The other looks mal-nourished. Everything else is the same ... right? We'll find it.

The first one was a coco mix and the tall skinny was in regular soil i forgot the brand I use fox farms and Cronk nutrients. I used a heavier feed for the first plant they are (cheese autos) btw I think the main reason is because I had it mixed in with photos under their light schedule of 12/12 so it played a major part in the malnourishment. I was light feeding it. I usually feed once or twice a week depending on the plant and how much water it requires

KG1 · Sep 16, 2025

Hard to find a fertilizer that doesn't have more than enough cal and mag in these days, extra never did nothing for no one ever just cause issues as you exceed nitrogen and other elements.

Used promix for some time the lime in it means don't pH anything and trying to will likely cause a problem. Lime is a bugger, until it's used it will do all the pH work for you.

Time and more experience will solve these problems but you can make the grow more simple by ignoring cal mag and pH. Two things many fuss but never seen results from in promix and soil.

Food for though just some ideas you don't have to subscribe to them but there are many using these methods so I highly doubt promix needs pH products or your fertilizer is deficient in cal or mag.

Keep going you'll get there most looks really promising

RoadKillSkunkHunt · Sep 16, 2025

HighRollin4 said:
That’s true man, I’ve had a lot of runs myself and sometimes I still beat myself up in terms of expertise but no one’s perfect especially in nature. I’m 100 percent aware things can and will go left, that’s what I love about horticulture, the endless possibilities. Keep it up tho bro

@HighRollin4 let's do this. Start your own new thread. Post your pictures, everything about your grow media, environment, lighting. Everything in as much detail as you can. We'll sort through it. Others will help out too. It will be great .... trust me.

@imgrowing lets get your thread back on track ...

RoadKillSkunkHunt · Sep 16, 2025

@imgrowing I circled the top of the bud in one of your pictures. I'm trying to get a better picture in my mind of your issue. What it appears from me viewing your pictures (sometimes we need a picture where you're back a bit further so we can see the whole plant and sometimes the whole grow) is that the closer to the light you get, the worst the problem gets. The plants in your grow that are further away have less leaf damage? Is this correct ...

imgrowing · Sep 17, 2025

there is only 2 girls out of 9 doing this, and this 1 is at the edge of the light. 2 sp3000 lights that are about 75%.
height varies but nothing to close, i forget what ppfd their at but it wasn't to much.
also leaves at the bottom are doing this as well, but not to this extent.
anyone think i should just feed these 2 with calmag?

imgrowing · Sep 17, 2025

THCosmic said:
Yeah, my first thoughts are light or heat as well.

@imgrowing You mention temp and humidity are good, but what are the exact ranges you have been dealing with? If they are ideal, then light intensity as mentioned by @RoadKillSkunkHunt is the most likely culprit.

temps are 20c (72f) to 26c (79f) lights off and on, humidity is 55 now and decreasing as they get closer to finish.
it varies of course but never to much, outdoor shed grow. heater, a/c , dehumidifier , humidifier intake and exhaust fans.

RoadKillSkunkHunt · Sep 17, 2025

imgrowing said:
there is only 2 girls out of 9 doing this, and this 1 is at the edge of the light. 2 sp3000 lights that are about 75%.
height varies but nothing to close, i forget what ppfd their at but it wasn't to much.
also leaves at the bottom are doing this as well, but not to this extent.
anyone think i should just feed these 2 with calmag?

I could be wrong about this but to me, it looks over fertilized not under. Cal-mag won't help if you're already locked out. Honestly though, you've handled your feed routine and you're not exactly new to growing. I think in your case, I would follow my gut instinct if I were in your shoes.

imgrowing · Sep 17, 2025

RoadKillSkunkHunt said:
I could be wrong about this but to me, it looks over fertilized not under. Cal-mag won't help if you're already locked out. Honestly though, you've handled your feed routine and you're not exactly new to growing. I think in your case, I would follow my gut instinct if I were in your shoes.

yeah you might be right. when i cut feed in half the other girls are now showing n deficiency, so back up to full feed for them and life support nutes for these 2 for awhile. worse case i toss it.
picture because i took it

RoadKillSkunkHunt · Sep 17, 2025

imgrowing said:
yeah you might be right. when i cut feed in half the other girls are now showing n deficiency, so back up to full feed for them and life support nutes for these 2 for awhile. worse case i toss it.
picture because i took it

It might not be your best work, but I wouldn't toss it. It's a living plant and we all know that there's no such thing as a perfect grow. There's always something.

It's not horrible and it would look decent after removing the burnt leaves. I bet you'd get decent smoke from it.

GNick55 · Sep 18, 2025

light stress and all the plants show signs

carlosescobar · Sep 18, 2025

Excess calcium is difficult to detect, as it causes the blockage of several nutrients, creating deficiencies in potassium, magnesium, manganese and iron. If this is your case, you will notice it because the tips of the leaves of our plant have small black dots or have been burned. The plant, having excess calcium and, therefore, preventing the nutrients it needs from reaching the plant, also has many difficulties breathing and the result of the effort to achieve it is precisely what we have just mentioned.

The newest leaves wither
Growth can be stunted
Blocks the absorption of potassium, iron and manganese

why do a couple plants do this every grow

why do a couple plants do this every grow

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why do a couple plants do this every grow

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