First timer with problems

HELP ME!
hi i am a first timer and iv started my first grow using canna coco.i dont think they are growing as fast as they should.i started with cuttings in jiffys when the first couple of roots popped thru i put them in my 15 litre pots with canna coco + 1/3 vermichulite.they been in now for 10 days and have grown only a little.first few days i had them on 24 hr light then switched to 18 i watered with fresh water half a litre each to start then another later that day as the temp reached 106f av since got air con unit and is great keepin it at around 28/30c.i have since been giving them a litre each after 2 days but its not drying very quickly eventually had to leave them 4 days b4 a feed.is this normal or am i feeding 2 much?.i since found out the ph in the first week feed was 7ph av now changed it to 6.2.am using gh nutes 3 part and feeding a bit less than it says and rizatonic.i have had some spots on the leaves aswell i cut the bad parts off to stop it spreading and its not as bad now.not sure what im doin wrong can anyone help me?

USING 600W HPS
IN A 1.2 X X2.4 X X2.0 GROW TENT
HAVE INLET FAN AND TWO OSILATING FANS
HUMIDITY AT AROUND 30%

Seems like you've getting your pH under control, your watering habits should be based on several items, type of soil; some soils hold water much longer than others even when you use perlite. Size of plant: the bigger the plant the more water is needed. Get a moisture meter and only water when it indicates that your soil is dry.

Watch your new growth to see if the problem persists, a pH of 6.2 is kinda low for soil. My research tell me that 6.5 to 7.0 is optimal, could be wrong though. I do know that bad pH causes nute lock-up though. It has happened to me. Also cut back on your feeding a bit to see what response you get, you may be over-feeding. I've learned that your plants will tell you what they are geting too much or too little of by watching them. The spots will never go away on the older leaves, so watch the new growth to see how your plant is reponding to any changes you make.

Good luck!

your tellin me that your getting temps of 106 and your wondering why you have problems?

temps are fine now.i was told ph in coco was supposed to be 5.8 to 6.2?.could it be the high ph nute lockout i only gave them 400ml each this morning after 4 days without any.getting worried i mite have root rot by overwatering?.will get some pics on soon let u have a look.

yah get some pics. will go from there

cam not too good with lights on

look how small they are from rooted cutting there 10 days old.
pic 2 is the best of the bunch
pic 3 is not looking too good

chumbawumba said:

cam not too good with lights on

Click to expand...

Looks like what happened to me, the lower fan leafs got yellow and died. Nute problems. check out the plant issue threads, might be low nitrogen caused by nute lock up due to pH problems.

Anybody got similar or better thoughts after seeing photos?

now that iv sorted the ph does anybody think they will be ok? or will they die?