Help me out, nute burn? Potassium deficiency?

LordHumungus187 · May 23, 2026

Ok, so a little background. I am using natures living soil (super soil), and after they started to flower I top dressed with flower girl ( also made by natures living soil. I am currently bottom watering with ac infinity bases/wicks. Every few days I top water to help introduce the flower girl nutrients down into the lower portion of the pot. I don’t think it is light stress because some of the lower shaded leaves show the same symptoms. I find it hard to believe that it could be potassium deficiency, but it does look like it has all the characteristics. I am using well water (not softened) that comes out of tap at around 7.3 I then add earth juice ph down crystals to drop it just below 7. Let me know what you think. Thanks!

LordHumungus187 · May 23, 2026

LordHumungus187 said:
Ok, so a little background. I am using natures living soil (super soil), and after they started to flower I top dressed with flower girl ( also made by natures living soil. I am currently bottom watering with ac infinity bases/wicks. Every few days I top water to help introduce the flower girl nutrients down into the lower portion of the pot. I don’t think it is light stress because some of the lower shaded leaves show the same symptoms. I find it hard to believe that it could be potassium deficiency, but it does look like it has all the characteristics. I am using well water (not softened) that comes out of tap at around 7.3 I then add earth juice ph down crystals to drop it just below 7. Let me know what you think. Thanks!

No takers? Lol

GNick55 · May 23, 2026

LordHumungus187 said:
No takers? Lol

looks like light stress to me or could be,.
what light you got
what power setting
how far tops

WinJr63 · May 24, 2026

How much ? ur input ratio nitrogen, potassium, or phosphorus. ur ppm, ec ur feeding to mush way hot this causes salts build up in the root zone, effectively burning the plant tips, whats ur runoff?
do a flush. Run about 2 to 3 times the volume of the pot with pH-balanced water (ideal pH is 6.0-6.5 for soil). Resume feeding at half-strength on your next feed .

Ninjadogma · May 24, 2026

Your lights might be exacerbating the problem but I'm seeing the classic potassium edge crisping and mag mobility disruption. The salts are likely starting to accumulate in the dirt and the root zone sitting in elevated or high EC. The pH sitting high is the real belligerent in the equation though. It's contributing negatively more than the light could be. This is when the tools should come out. Your pH pen to adjust your inputs and checking your output... And an EC pen to get that runoff value down to about 2.2. In about 2 weeks from now, 2.5 is the highest value you ever want the soil to hold and that's during peak flowering. You're also going to want to correct the pH by adjusting your input to a lower number and aiming to land your output in the low to mid 6's but don't ever adjust input below 5.8 when you're correcting. Just push more volume if you need.

LordHumungus187 · May 24, 2026

Ninjadogma said:
Your lights might be exacerbating the problem but I'm seeing the classic potassium edge crisping and mag mobility disruption. The salts are likely starting to accumulate in the dirt and the root zone sitting in elevated or high EC. The pH sitting high is the real belligerent in the equation though. It's contributing negatively more than the light could be. This is when the tools should come out. Your pH pen to adjust your inputs and checking your output... And an EC pen to get that runoff value down to about 2.2. In about 2 weeks from now, 2.5 is the highest value you ever want the soil to hold and that's during peak flowering. You're also going to want to correct the pH by adjusting your input to a lower number and aiming to land your output in the low to mid 6's but don't ever adjust input below 5.8 when you're correcting. Just push more volume if you need.

Thanks for responding! I don’t have run off because I am in super soil. I always water with well water ph’d to just below 7. I read that if you have to lower your water you should only use enough ph down to get under 7 so that the salts don’t build up to fast. Evo 6 light at level 7 try to keep it 1.5 to 2 feet above canopy. What’s my best way to add potassium being that I am in an organic grow? Or is potassium there but not being absorbed because of my ph?

amneziaHaze · May 25, 2026

LordHumungus187 said:
No takers? Lol

Light or too much nutes.ph is hard to fuck up in soil unless you tried to adjust it with something then that could.you can test with those ph stripes i think its called a slurry test or something like zhat
For nutes allways think if its at the top your adding too much if its at the bottom your adding too little

Organic nutes allways have a delay because plants cant take it until bacteria eats it and shits it out.over time your colonie of bacteria will grow with lots of food and start relesing faster

Week4Bytch · May 25, 2026

Check your soils pH to know for sure, and stop using the pH down for now. The pH down itself is adding to the soil and might be causing disruptions. Did you add any compost or earth worm castings throughout your grow? My first guess would be potassium too.. it helps the plant regulate heat. How close are your lights to the top and what size pots are you in?

LordHumungus187 · May 25, 2026

Week4Bytch said:
Check your soils pH to know for sure, and stop using the pH down for now. The pH down itself is adding to the soil and might be causing disruptions. Did you add any compost or earth worm castings throughout your grow? My first guess would be potassium too.. it helps the plant regulate heat. How close are your lights to the top and what size pots are you in?

From this plant lights are up about 2’. They are in 5 gallon rain science autoflower (tall) pots. I’m tempted to pull it and water it to the point of runoff just to check. I have used so little ph down I can’t believe that is the problem. Probably 2 teaspoons so far max per plant. Plant is Trainwreck by the way.

Week4Bytch · May 25, 2026

LordHumungus187 said:
From this plant lights are up about 2’. They are in 5 gallon rain science autoflower (tall) pots. I’m tempted to pull it and water it to the point of runoff just to check. I have used so little ph down I can’t believe that is the problem. Probably 2 teaspoons so far max per plant. Plant is Trainwreck by the way.

2 inches? Or 2 feet? Yeah 2 teaspoons doesn't seem like much until you realize that your are using 2 teaspoons every time you water. So if your watering two to three times a week .. times the number of weeks you've been growing...it's not exactly just two teaspoons in the soil. And checking your soils pH is different from checking the waters pH. I was confused with that one for couple seasons. Because they're both not the same. There's meters to measure the pH of water and there's meters to measure the soils pH. If your relying on the soil to feed your plant then the soils pH is the one you want to pay attention too. Not the waters. Because most of the water passes the roots and just flows out the bottom. Soil sits right there in the root zone...24/7. Big difference between bottle feeding and just letting the soil feed the plant for ya. Because the roots change the pH at the roots zone to interact with the soil. The closer the soil is to that perfect pH range the less work the roots bio activity has to be. The soils perfect range is around 6 to 6.8 (or even 7) if your outside of that there is usually problems with certain nutrient uptake. If you're relying on the soil to feed your plant... Gotta get that pH in optimal range. If you have no ways of getting the soils pH, try topping with some really good earth worm castings, and don't be stingy with it, about an inch of it covering the top soil and let that help you get your soils parameters in check. That's why larger pots are easier to grow in when your relying on the soil to feed your plant, because of the larger root mass. Have more room for any errors made. But you can do it in 5 gallons, just a little more work to it. I've done it in 5 gallons. But yeah, if your at 2 feet above your plants with the lighting you are good, but 2 inches .. way to close. Good luck with the grow,

MrSativa · May 26, 2026

Looks like the top dressing burned them in my opinion

I had the same previous round after top dressing palm tree ash

GNick55 · May 28, 2026

any updated pictures??

LordHumungus187 · May 29, 2026

I will get some pictures tonight and yes, it’s 2 foot not 2 inches and when I said 2 teaspoons max per plant I meant over the history of their lives. Total only used probably 2 teaspoons per plant. I did a partial flush on both plants that are showing the same symptoms. I don’t have a soil pH meter and I know you can do a slurry test but trying to get soil from the actual root zone would be almost impossible without either harming the plant or destroying my pots.

LordHumungus187 · May 29, 2026

They look worse since I flushed. The only thing I’m learning is that I don’t want to grow with super soil anymore. Loved the idea of just water grow.. but this is my 3 rd super soil grow that has gone sideways during flower.

GNick55 · May 30, 2026

LordHumungus187 said:
They look worse since I flushed. The only thing I’m learning is that I don’t want to grow with super soil anymore. Loved the idea of just water grow.. but this is my 3 rd super soil grow that has gone sideways during flower.

2ft away at 70%,, try 50%,,
what’s your temperature and humidity?

Gmix · May 30, 2026

LordHumungus187 said:
They look worse since I flushed. The only thing I’m learning is that I don’t want to grow with super soil anymore. Loved the idea of just water grow.. but this is my 3 rd super soil grow that has gone sideways during flower.

See a lot of super soil grows go sideways during flower

LordHumungus187 · May 30, 2026

GNick55 said:
2ft away at 70%,, try 50%,,
what’s your temperature and humidity?

GNick55 · Jun 2, 2026

what’s going on??
pictures?
did you adjust the light?

GNick55 · Jun 2, 2026

LordHumungus187 said:
They look worse since I flushed. The only thing I’m learning is that I don’t want to grow with super soil anymore. Loved the idea of just water grow.. but this is my 3 rd super soil grow that has gone sideways during flower.

it’s not the super soil,.
matter of fact it’s probably the best!,.
your issue is the mostly the lights and flushing and possibly your watering method,..

Help me out, nute burn? Potassium deficiency?

Help me out, nute burn? Potassium deficiency?

Yellowing - Mid Flower

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Help me out, nute burn? Potassium deficiency?

Help me out, nute burn? Potassium deficiency?

Yellowing - Mid Flower

Grow setup

Intake photos

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