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My second grow, problem with seedlings

Zaxar

Zaxar

New member
Hello my friends!

As summer is over and Im back from my vacation I stated my second grow!
So I germinated 3 seeds. One of them is AK-47 and two others are seeds which I left from previews grow (strain is unknown but they where pretty awesome ;) )

So this is my problem:

I grow in small grow box (0.6x0.6 Height 1 Meter) under CFLs.
Started in solo cups and they are 2 weeks old now. First week I only had one 40w cfl and they where growing very rapidly.
After one week when they grew a little bigger I added 2 bulbs 30w + 40w so I have 120w total.

About one week ago I noticed that they stopped fast growing and lower leaves stated to drop. And today I also noticed that one of my seedling (the bigger one) started to yellow lower leaves.
Soil mix is standard forest soil and perlite (about 50/50 mix).
As for PH, I learned a lesson from previous grow, so now I stated to take care about PH from very beginning. Water in my country has 8.0 PH so every time I add about one spoon of lemon acid (on 1L of water) before watering and when I check runoff water it is 6.5 so I dont think that i could be a PH problem.
As for watering I water them when top of soil feels dry. (I also made a lot of holes under solo cups.) and I dont use any kind of nutrients yet.

So the only thing Im thinking can cause problem is Temperature/humidity. Unfortunately I dont have device to measure them, but I can say that in most cases my box is open cause as I live alone and the room where I grow is locked. Beside last week in my country was high temperature.

Any ideas what can cause this problem or how to fix it?

Thanks a lot!

https://imgur.com/a/nzi7W

https://imgur.com/a/iXQzF

https://imgur.com/a/0Doyi

https://imgur.com/a/NVuQC
 
Yeah ,you need to water them. That soil in those cups looks like the desert to me. Very dry looking. Does water come out the bottom every time you water??
 
If watering isn't the issue u may want to add some nitrogen , after 2 weeks your plants might be running low, also check the roots might be root bound , good luck !
 
thanks my friends!

Now I remember 2 or 3 watering when they looked so dry (Like in my pics) Cause of my work sometimes I cant return at home for 2-3 days.

So can this cause that kind of problem?
 
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