my first grow need help please

growing 3 big buddha cheese
1 white widdow
room size 5ft by 3 ft with 600 watt grow light fan on 15 min turn off 15 min on timer lights are on 18 hours 6 off turn off at 1 pm turn on at 7 pm everything seemed to be going well until i noticed the leafs tips turning yellow i have checked the light to see if its to low it feels warm not burning back of hand i have good tempature ranges from 70 to 85 depending im using a litre of water and ph the water at 6.2which is kind of lime green add a and b formula 4 mls to every litre and 4 mls of rhizotonic i repotted today and put in bigger pots and put stones at bottom for drainage im using clay pebbles mixed in soil friend who grows recomended it as he has grown some wicked plants the last one i smoked off his was blueberry and what a lovely smoke it was turned out incredible
can anyone give me any pointers i dont want to loose my small crop i have added some pictures about 3 days ago when they were looking good please help all help would be realy apreciated thankyou

Not being a dick or anything, but please use punctuation in your posts. It makes it less annoying and people are more likely to respond. First off, are the leaf tips on all of the plants yellow? Second, how big are the plants? Also, exactly how far away is the light? Soil and container size? I would just leave that fan on 24/7 if I were you.

Add those picture man, and 1 question at a time.

Pics help so much more than trying to explain what the problem is.

sorry will let you know asap thanks mate

Check the PH of the runoff water. You might find that it's a nice shade of yellow-orange...I had to start adding dolomite lime to keep the soil from pushing the PH too low.

Pot size is: 11.5 inches in diameter.
The height of the light from the top of the plant to the bulb is 29 inches
white widow is 4 inches high as are 3 of the big buddas, the other big budda is 3.5 inche high.

I have added pictures in my album, wasnt sure how to get them on this page. Not realy good with computers, thanks for all your replies and sorry about the bad punctuation.

I read thru that paragraph again. Normally you don't use nutes for like 3 weeks. Could be nute burn. PH for soil grows should be a bit higher than that. Are you testing the PH after adding the nutes? They'll lower PH also.

Sheepdog420 said:

I read thru that paragraph again. Normally you don't use nutes for like 3 weeks. Could be nute burn. PH for soil grows should be a bit higher than that. Are you testing the PH after adding the nutes? They'll lower PH also.

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hi thanks for the info i will do a mix tommorow and check after adding nuits . Do you recomend i put to 6.5 or bit more. I flushed the system yesterday just in case . could it be that im over watering ?
thanks for your help il let you know the outcome thanks .

hey! nice to meet you!..hmmm I am not an expert by far..but it could be that you are over watering them...let me copy you a couple links that really helped me..

http://www.scribd.com/word/full/2522847?access_key=key-2i0rykcbnjwvk4u4rcna

and

http://www.cannabis-seed-banks.com/growing-cannabis-overview.html

thanks for the links mate. Il have a good read im sure they will help me thanks again.

Not much than a noob myself, but from what you're telling me there's no way it's overwatering... overwatering turns the leafs colour into dark green and makes them pointing downwards like it would get heavier (had this problem a few times).
Right now i'm watching your thread really closer because one of my girls seems to have the same problem. Upper leafs have yellow-brown tips, but the general health of the plant looks great...

does anyone have advice on how to water plants and when nutes should be introduced???

I was told after 3 weeks add nuits and to check the ph after you add the nuits as it can lower ph level.

I just hope they turn around for both of us. When i flushd the system i checked ph level which was at 6.2 is this right for soil and clay pebbles. Got good drainage on all four plants. im also using rhizotonic which is supposed to help them.

ok thank you very much man

start off on a lower rate first some say half it what it says on bottle as it can cause nuit burn and ph after adding nuits as it will lower ph level hope this helps good luck with your grow

Hey Widdow! hope the plants are doing well..thanks for the comments on my page..I know what you mean by all the benefits of growing yourself..for me I am trying to be extremely discreet and I know that it is safe to smoke as well..did you ever get any pics on here? i looked but didnt see any..would love to see some whenever you get the chance..I'll for sure keep on posting on here..great thread so far~

Widdow do you have any pictures on whats going on with your plants???

hi here are a couple of photos


big budda cheese white widdow mybe 4th week




thanks to everyone for your comments

did you start giving them any nutes???? or anything like that what type of water are you using???