leaves going from yellow to brown spots big brown spot

my leaves on my seedlings turned yellow after i put them in rockwool now 2 outta 10 have big brown spots what do i do... i bought some cal mag just not sure how much to use cuz im watering by hand please help

No nutes! your plants will very very rarely show deficiencies before they are 3 weeks old and over a foot tall, give them just water and they should recover

uhmm that sounds like potassium def

TheOtherGreenBud said:

uhmm that sounds like potassium def

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There is a 0.00% chance that your SEEDLINGS have a flowering deficiency. Besides, potassium deficiencys are red spots on the leaves. No nutes for you until they are over a foot tall

K def are red stems with yellowing spots on leaves followed by them dyng and crumbling

TheOtherGreenBud said:

K def are red stems with yellowing spots on leaves followed by them dyng and crumbling

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the stems are more red than purple now and the yellow is turning a brownish color and 1 thats already brown is crumbling like its dried up

I got weird blotches on my seedlings a couple months ago similar to what you're describing, I was over watering them caused some strange leaf deformation. Once I cut back on the water problem went away. was in 4inch rockwool cubes.

possible PH problem

mines in 3 in rockwool i may have screwed up someone else told me i wasnt watering enough so what do i do go down with my cal mag and water solution and let it rain can i fix this or is it too late

i bought a meter so no more shakin the bottle but ph is at 5.6

alright bros hopefully this is some good news but as you all know im a noob and this is my first grow but as some of you know ive been having a few problems with my seedlings yellow leaves then brown well last night i had enough and said this is either gonna cure em or kill em so i flooded the rockwool rooter cube with almost a half gallon of water and 5ml cal mag phed to 5.6 between 10 seedlings and tonight when i got in i m not sure but it seems like a whole bunch of new growth is happening leaves wise gettin bigger greener will this happen this fast or is it my imagination lol