Can’t figure out the issue

Hi so I’m running autos, they already in preflower, I think is been 6 weeks so far and I begun having some issues in fourth week even tho I have been feeding them with any nutes. The soil I use is canna terra pro plus and apparently I’ve found out that this is too hot for autos. Anyways I got my seeds off fast budz and I was sending them few photos asking for the advice and they responded that it looks like minor nutrient burn so I flushed the medium and yesterday I fed them again with 1/4th of canna terra bloom and gave them bit of cal mag, ph of solution 6.8 but it seems like they getting worse and worse, can’t figure out what else to do, I rose the lights higher up as well to make sure it’s not a light burn but don’t know how to make them better, any suggestions? It crossed my mind that maybe it is nute burn and I just started feeding them back again too soon? Maybe I should lightly flush them for a week or so give them plain water and wait a week or something?

Your plants won't heal. Their response is delayed. Give them time and stop messing with them. Look at the condition of new growth. One of my biggest problems is changing alot to fix a little. You have to change one thing, and give them time to respond. The raised lights probably won't hurt.

Tolerance Break said:

Your plants won't heal. Their response is delayed. Give them time and stop messing with them. Look at the condition of new growth. One of my biggest problems is changing alot to fix a little. You have to change one thing, and give them time to respond. The raised lights probably won't hurt.

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I know they won’t heal but shouldn’t yellowing or the leaves stop ? Instead it’s getting worse and worse so I do need to try doing something before it’s all gonna be shitty wasted crop

That yellowing is most likely the stage of nute burn right before the tip gets brown & crispy. Take it easy with them. The plant will let you know when it’s hungry. The leaves are pretty green. The goal is to keep them green.
Constant over feeding can make your leaves unusable to the plant.. then they die off.
On the flip side..under feeding will give you an opportunity to make things right with a little more food on the next watering. In my experience most autos won’t need as much of a feeding as photoperiod plants. Less is more.

Just be aware that what can look like nute burn can also be early stage K def or Mag def - would need to see a pic of the whole plant, how are the bottom leaves looking?

yosim said:

Just be aware that what can look like nute burn can also be early stage K def or Mag def - would need to see a pic of the whole plant, how are the bottom leaves looking?

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Nute burn isn't a thing. So that helps narrow things down. He's feeding calmag, and it's getting worse. That hells narrow it down even more. 100% of grows posted on this website have the exact same problem, why do so many pretend they don't have burnt tips?

NO nute burn is not a thing. Ask a 'rols' grower, their soils are absolutely loaded with salt from all the sea inputs. Then some hydro grower comes along writes a book and tells everyone that deficiencies are 'nute burn'. Seaweed grows in 35000ppm of salt and most ferts contain seaweed..

BeauVida said:

Nute burn isn't a thing. So that helps narrow things down. He's feeding calmag, and it's getting worse. That hells narrow it down even more. 100% of grows posted on this website have the exact same problem, why do so many pretend they don't have burnt tips?

NO nute burn is not a thing. Ask a 'rols' grower, their soils are absolutely loaded with salt from all the sea inputs. Then some hydro grower comes along writes a book and tells everyone that deficiencies are 'nute burn'. Seaweed grows in 35000ppm of salt and most ferts contain seaweed..

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Marsh plants and plants that can live in brackish water are a reality and plants that are not adapted to living in higher salt conditions are also a reality. There's a wide range of diversity out there.

BeauVida said:

Nute burn isn't a thing. So that helps narrow things down. He's feeding calmag, and it's getting worse. That hells narrow it down even more. 100% of grows posted on this website have the exact same problem, why do so many pretend they don't have burnt tips?

NO nute burn is not a thing. Ask a 'rols' grower, their soils are absolutely loaded with salt from all the sea inputs. Then some hydro grower comes along writes a book and tells everyone that deficiencies are 'nute burn'. Seaweed grows in 35000ppm of salt and most ferts contain seaweed..

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Chelated nutrients that are immediately available for uptake by the plant are not the same thing as organic matter that must be converted by microbial, fungal and animal organisms to be usable by the plant. Having a huge nutrient load in living soil does very little for a plant unless the soil biology is present. Try watering some healthy plants with some 10 ec solution of chelated nutrients for a few days and I think you will find that nutrient toxicity (burn) is a very real thing.

yosim said:

Just be aware that what can look like nute burn can also be early stage K def or Mag def - would need to see a pic of the whole plant, how are the bottom leaves looking?

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Magnesium issues make the leaves look striped, doesn't start at the tips like this. K maybe, but not mag

PopAndSonGrows said:

Magnesium issues make the leaves look striped, doesn't start at the tips like this. K maybe, but not mag

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it can be seen on the tips as well which is why you would need to see a pic of the whole plant, in particular the bottom leaves

Its just nute burn, you've flushed them already now leave them alone. Like someone else said the plants response to changes is delayed by days. Keep and eye on new growth. Good luck

Remember once you feed it takes 1 week for your nutrients to be up-taken by your plant