Second grow. Can someone diagnose for a newbie?

[Xakmo]

My first grow was successful somehow , up until the end of flowering then i stopped giving them water for the last week and they kind of got fluffy and discolored.

But it tastes amazing flavor and does get you high just more cerebral. I harvested when there was amber trichomes on some of them but all in all I think I could of let them go longer if I kept giving them water but the buds started browning since I didn’t give them any last 8 days so I think I harvested early and thats the cause of no couch lock just cerebral high very strong and then a relaxing feeling. But my preference is strong body high

I’m reusing the premade soil I used in the last grow that I flushed with ph 6.5 water for 20 days prior harvest. I just crushed the soil took out the roots and presoaked it and thats it.

Last grow was Tropicana cookies from Fast Buds.

This time I got some random photoperiods I think some of them are blueberry , la blanca , himalayan gold , marleys collie

Those are the ones I remembered but I have them mixed.

Then I have some autoflowers Gorilla Cookies and Ztrawberriez from Fast Buds and they are doing fine for now but Its first time Im noticing some problems and I will explain it real quick.

I transplanted the seedlings into final pots (15l) when they were about 14 days old.

I watered them with allot of water then I usually give since the soil was dry the day I transplanted.

Since then I gave them nothing for another 14 days and some drank it up some didnt. So I gave the ones that did drink it some water about half a liter. The day I watared them i noticed some lower leaves fading on some so I foliar fed them some salt based grow nutrients from GHSC called GROW. I took what they recommended for young plants to give trough irrigation and diluted it with 1 part solution 9 part water and fed it to them under and on the leaves trough mist.

They responded quickly and grew quite well.

Its been 8 days I wasnt home since then and some are looking very deficient while some are looking overfed from what I understand.

Plant A - has thin new growth that is curling downwards a bit and dark green colored leaves.

Plant B - is light green colored all over

Plant C - Looks healthy up top but lower leaves show deep

discoloration with necrosis and chlorosis both happening.

Plant D - looking healthy to me

I gave them nutrients again with the same dosage and nutrient mix trough misting today but

Since I dont have experience I know for sure the best I can do is guess , so I think they will be better handled if they get some help from someone that knows this already.

I will take pictures of the each plant individually and tell you the environment they have which is ;

29 degrees celsius ( falls a few degrees during night)

62% humidity (steady)

18h of 400ppfd full spectrum+ far red LED light. ( just thinking of upping it to 500ppfd 18/6)

The water I have (tap) has ppm close to 500.

And the total ppm value for this stage recommended is 610.

Should I just add 100ppm amount of nutrients to that 500. Of that 100ppm 25% chelated calcium and 75% a balanced grow mix containing all micronutrients ?

I will make a timelapse video of the plant that is very deficient and that I have sprayed today with the foliar feed and post it here for you and me to best see what is happening and is the deficiencies reversing since this foliar feed. I dont really have a plan on how I will go about watering and feeding them and Im just trying to adapt as I go so any advice is appreciated.

They are 36 days old

Can you tell me what you see is happening.

here are the photographs;
Since idk how to comment on each one of em ill repeat
Some are lighter green under light then others i consider healthy
Some are fading from the bottom
Some are necrosis from the bottom fast occurring and going towards top
Some are dark greeen with think new crusty leaves and light green tips
Some look completely healthy with only the first cotlydeons yellow or even them green.
What would be your method of action here ?


Once again thanks for the warm welcome :)



Kamjak

 

[BillyBanchan]

Two things real quick... Your high ppm tap water is no bueno! Use an RO filter and save the ppm for nutrients.

Also, reusing soil isn't an automatic fail, but most agree that reusing soil can increase your chances of plant disease. If you want better control over nutrients (and pH), research inert mediums such as coco coir, hydroton, and rockwool. By flushing your soil, you're stripping away nutrients and then trying to feed 100ppm to your girls (and 500ppm of whatever is in your water!).

Also, increasing lights to 500 μmol/m2s will just demand even more nutrients.

B²

 

[GNick55]

you see any itty bitty tiny flies flying around or walking on soil surface? use a magnifying glass..

 

[Boo1965]

you see any itty bitty tiny flies flying around or walking on soil surface? use a magnifying glass..

I have fungus knats and I would swear they came from the ocean forest soil I used . When I water I water well so no dry pockets but I let my soil dry almost completely out before I water again. I read a review on this soil and a few people was complaining about fungus knats coming in the soil . Just an observation and not trying to jack your thread.