Brown spots worsening, now getting light dots and new growth leaves curling

[Scroger]

Hey everybody, first grow so I'm not sure how to remedy this. I'm in coco/perlite, HLG 350R light, General Hydroponics FloraTrio nutes and Calimagic. Water is 0.8ec and 5.8pH.

My plant had some spots turning brown and I asked on here, seemed like it wasn't a big deal. But now at 16 days old the spots look dead, and the plant has white-ish dots going up the leaves, including the new growth leaves. Plus the new growth leaves are curling downwards.

Lately the changes I made are: changed nutrients from 0.3ec to 0.8ec strength. The other plants seemed to absolutely love it (both are thriving, no spots, no curling, in the same tent). And just yesterday lowered the light 2" because the two healthy ones were reaching a bit. I'm attaching the photos here, last picture is a few days ago when the spots first appeared. Please let me know what you think! Thank you so much for your time.

 

[namvet25]

Did you get any nutes splashed on the leaves? Dosage of nutes in ml or tsp per gal please.How close are your lights?

 

[Scroger]

Did you get any nutes splashed on the leaves? Dosage of nutes in ml or tsp per gal please.How close are your lights?

Does the water/nute mixture count as nute splash? I don't mix the concentrated nutes close to the plant, but the fertigate gets a lot of water on the leaves that I try to gently wipe off (have a hard time watering under the plant leaves at their height). Would the diluted water droplets cause that burn? Lights are now 18", they were about 21" a couple days ago.

For dosage per 1 gal I use: 1/2tsp FloraMicro, 1/2tsp FloraGro, 1/4tsp FloraBloom, 1/2tsp Calmag. Which comes out to like 1.1-1.2ec, but I add another 25% water to dilute to 0.8ec.

 

[Olderfart]

Yes, diluted nute mix will cause spots. I think the problem is that once evaporated, the salt residue does the damage, maybe exacerbated by the ability of water droplets to act as lenses to concentrate light. I have never noticed any harm from straight water with Colloidal Silver in it. I soak my pollen plants completely with lights on, and they never spot, so I think the issue is the salt. If you can't water without splashing, get a different watering can with a long narrow spout that enables you to put the nute mix where you want beneath the canopy. I use a turkey baster for seedlings, and a watering jug with a long curved "nozzle" for larger plants prior to turning on automatic irrigation.

0.8 EC should be just fine if it is mostly from your nutes. What is the starting EC of your water supply? The curling of new leaves is often a calcium issue which the babes sometimes grow out of. Did you buffer your coco yourself? If not, are you certain that it was buffered?

Good luck with it, the babes don't look bad to me.

 

[Scroger]

Yes, diluted nute mix will cause spots. I think the problem is that once evaporated, the salt residue does the damage, maybe exacerbated by the ability of water droplets to act as lenses to concentrate light. I have never noticed any harm from straight water with Colloidal Silver in it. I soak my pollen plants completely with lights on, and they never spot, so I think the issue is the salt. If you can't water without splashing, get a different watering can with a long narrow spout that enables you to put the nute mix where you want beneath the canopy. I use a turkey baster for seedlings, and a watering jug with a long curved "nozzle" for larger plants prior to turning on automatic irrigation.

0.8 EC should be just fine if it is mostly from your nutes. What is the starting EC of your water supply? The curling of new leaves is often a calcium issue which the babes sometimes grow out of. Did you buffer your coco yourself? If not, are you certain that it was buffered?

Good luck with it, the babes don't look bad to me.

Hey, thank you for the reply! I will try to do better about not splashing on the plants, thank you very much for that. I mistakenly only filled my pots like 2/3rd full, so its been difficult getting under the leaves while it's so short.

My starting water is RO, so everything is nutrients. And I did buffer the coco based on the cocoforcannabis guide, soaked twice for 8+ hours in the 1.5x strength calmag. Then before planting the germinated seeds I flushed the coco down to about .2-.3ec because I planted my seeds straight in the final coco pot. Up until 2 days ago my nute mixture had double the amt of calmag (1 tsp per gal. then vs. 1/2 tsp now), which sounds kinda like a lot to me but I was just following a schedule I found online. By calcium issue, does that mean too much calcium?

The other plants are kinda thriving, so I'm wondering if there is situations where I just can't keep multiple strains happy at the same time? This is my first grow so I don't know how to approach it. Do I do what's best for the majority of the tent? Or do I adapt to fix the sick plant and hope the others will still like the new environment/nutrients? Or does every plant get their own tailored nutes and watering frequencies etc? Thank you so much for your time!

 

[420autoflower]

Hey everybody, first grow so I'm not sure how to remedy this. I'm in coco/perlite, HLG 350R light, General Hydroponics FloraTrio nutes and Calimagic. Water is 0.8ec and 5.8pH.

My plant had some spots turning brown and I asked on here, seemed like it wasn't a big deal. But now at 16 days old the spots look dead, and the plant has white-ish dots going up the leaves, including the new growth leaves. Plus the new growth leaves are curling downwards.

Lately the changes I made are: changed nutrients from 0.3ec to 0.8ec strength. The other plants seemed to absolutely love it (both are thriving, no spots, no curling, in the same tent). And just yesterday lowered the light 2" because the two healthy ones were reaching a bit. I'm attaching the photos here, last picture is a few days ago when the spots first appeared. Please let me know what you think! Thank you so much for your time.

I really wouldn’t even worry about it. Overall your new seedlings look healthy and those leaves that are in question will eventually shed off soon. I don’t worry about small spots if I know my plants are healthy. Here are the same spots you have that are on 2 out of my

18 OG Kush autos that I just germinated.

 

[Olderfart]

Hey, thank you for the reply! I will try to do better about not splashing on the plants, thank you very much for that. I mistakenly only filled my pots like 2/3rd full, so its been difficult getting under the leaves while it's so short.

My starting water is RO, so everything is nutrients. And I did buffer the coco based on the cocoforcannabis guide, soaked twice for 8+ hours in the 1.5x strength calmag. Then before planting the germinated seeds I flushed the coco down to about .2-.3ec because I planted my seeds straight in the final coco pot. Up until 2 days ago my nute mixture had double the amt of calmag (1 tsp per gal. then vs. 1/2 tsp now), which sounds kinda like a lot to me but I was just following a schedule I found online. By calcium issue, does that mean too much calcium?

The other plants are kinda thriving, so I'm wondering if there is situations where I just can't keep multiple strains happy at the same time? This is my first grow so I don't know how to approach it. Do I do what's best for the majority of the tent? Or do I adapt to fix the sick plant and hope the others will still like the new environment/nutrients? Or does every plant get their own tailored nutes and watering frequencies etc? Thank you so much for your time!

Your setup sounds fine, and I think your seedlings will be ok. If their color seems a bit light later, you could bring your EC up 10% or so, and then watch for a couple days to see how the new growth looks. If you see yellowing leaf tips, back off 10% right away. I expect your grow will be just fine. The instructions on Cocoforcannabis.com are good, and it seems you have done a good job of following them.

As to the multiple strain issue, I have always grown more than one strain on a single nute mix because all my plants have to share reservoirs. I just try to shoot for the strongest EC that the most sensitive strain will tolerate, and that is what everyone gets. The strains that would put up with a stronger mix might not get quite enough to maximize yield, but so far they have always got enough to do well.

If you hand water, you can tailor the strength or even the composition of your nute mix for each plant, but that is not what I do. I am not interested in making more fuss than necessary.

Good luck with the grow, and welcome to AFN.

 

[Olderfart]

Thanks for the rep @blue, much appreciated.

 

[Scroger]

Your setup sounds fine, and I think your seedlings will be ok. If their color seems a bit light later, you could bring your EC up 10% or so, and then watch for a couple days to see how the new growth looks. If you see yellowing leaf tips, back off 10% right away. I expect your grow will be just fine. The instructions on Cocoforcannabis.com are good, and it seems you have done a good job of following them.

As to the multiple strain issue, I have always grown more than one strain on a single nute mix because all my plants have to share reservoirs. I just try to shoot for the strongest EC that the most sensitive strain will tolerate, and that is what everyone gets. The strains that would put up with a stronger mix might not get quite enough to maximize yield, but so far they have always got enough to do well.

If you hand water, you can tailor the strength or even the composition of your nute mix for each plant, but that is not what I do. I am not interested in making more fuss than necessary.

Good luck with the grow, and welcome to AFN.

Hot dang, this answers every question and concern I had. Thank you so much for taking the time to help me out, I feel like I can relax now!

 

[Olderfart]

Thanks @olegren, much appreciated. You guys are too kind.