Need help figuring out what is wrong with my plants in vegging

[sunflower77]

Thank you in advance for your help! These plants are all in vegging.. water is PH adjusted and I use nutrients and all that, just so frustrated and really need some help getting back on track. Magnesium? I started adding magnesium+calcium supplement to help but it doesn't seem to be helping.. sprayed them with a Epsom salt mixture tonight. Nitrogen too much/too little? The bottom leaves are dying a lot but there's also some leaf tips curling under. Potassium deficiency? I don't know..

 

[Jamesnns]

Im just a noob...but from what Ive read and seen this looks like classic nute burn.
Id wait for other more knowledgeable people...
Google image "nute burn, pot plants"

 

[OldMedUser]

Looks like nute burn to me too. Or you may have toxic salts buildup which looks much the same. I would expect the leaves to be darker green if it was way too much N alone.

How much and what kind of nutes are you feeding them? What kind of water are you using too? Tap water with a high mineral content/high ppm can quickly bring on toxic salt levels. Anything over 100ppm will eventually cause problems and many are up to 500.

I would flush those plants with 3X the pot volume with the final flush being a nute mix at half strength.

 

[ShiggityFlip]

I am going to say nute burn also compounded with contact of the plants to a cement floor. Soil pots should never contact concrete directly, put some foam down between those plants and the floor. Cold wet soil is a recipe for nutrient lockout. It will make yellow lower leaves, and droop all of them. Might be some overwatering issues as well.

 

[ZARBU]

Definitely cal/mag deficiency on first 3 pictures, or cold environment???

But those yellow leaves point to iron, iron is needed to absorb nitrogen.

im guessing you in coco and perlite?

Cut you nutrients by half and foliar feed with normal strength kelp together with half a gram of iron chelate per liter of water, mist 15 minutes before lights out, dont foliar feed when its hot, the stomata in the leaves are closed, and burning can occur too.

Foliar feed every 2nd day for 14 days (7 times) and see if things improve.

check your PH aim for 6 all the time (best range 5.5 - 6.5


sort cal /mag, stems are purple. in top 3 pics only.

I dont think its general nute burn, although there is leaf tip burn on some of those leaves. so more likely nutrient inbalance and lock out. But you are over watering, let them dry out.

What are temps like ? what sort of lighting, hid lighting is more forgiving to over watering if lights are low enough.

need more info on growing environment. too cold?

is your PH pen calibrated and reliable???

as many questions as answers sorry.

Kiwiiwik