Leaf tips turning brown

Hey guys, so i have a few week old plant that i FINALLY transplanted into my drip system. Roots are showing and growing nicely through the rockwool. it looks like its doing good growth-wise but i would like u guys to take a look and see if u can give me a diagnosis.

Attachment 276336
Attachment 276337

PH= 6.2-6.5
NUTES= Fox Farm Grow Big (3/4 Teaspoon in 2gal rez) that should be 1/3 strength so i made sure not to over feed it.
DRIPPERS= on 24/0
LIGHT=21/3 for the first week. Under a 20w florescent grow light. 2-3 inches above

And the brown stuff on the cotyledon is from when the seed popped off, i guess it left a layer of its embryonic tissues or something. But I'd appreciate any help you guys can give to get my baby's leaves back to tippy top shape :) thanks !

I know nothing about a drip system but shouldnt your ph be around 5.8ish? Do you usually feed that young? Im a soil user so these questions are just for my own curiosity.

you're right my ph is still a little too high. i'm adjusting it right now...but for the feeding, i've been told that as soon as the roots grow through the rw feeding is possible but at small doses.

Cool thanks for answering my questions.

hey guys another quick question its cool to add ph down or up while drip system is running?

I'll hit the last question first, yes you should be able to adjust PH when running since yuor doing adjustment at rez.
Running a drip system 24/0 while using RW pretty much = death by drowning. Looking at the pics the RW should be buried. sitting on top like that will grow algae.
Leave lights on 24/0 for now until a lil more mature.
If it was mine I wouldn't be feeding it yet but that is me, others like to pour the juice on as quick as they can but doing this can also lead to misreading other problems that occur.
20w bulb? I hope it is the actual watts of a CFL if not your gonna need more light. I use to start mine under a 100w equivilent CFL Daylight bulbs and that small the light be about 1" (inch) above the lil one.
Make sure you have a lil "breeze" on it so the stem will strengthen.
Anything else give a yell

Quote:

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Originally Posted by tinytoon

I'll hit the last question first, yes you should be able to adjust PH when running since yuor doing adjustment at rez.
Running a drip system 24/0 while using RW pretty much = death by drowning. Looking at the pics the RW should be buried. sitting on top like that will grow algae.
Leave lights on 24/0 for now until a lil more mature.
If it was mine I wouldn't be feeding it yet but that is me, others like to pour the juice on as quick as they can but doing this can also lead to misreading other problems that occur.
20w bulb? I hope it is the actual watts of a CFL if not your gonna need more light. I use to start mine under a 100w equivilent CFL Daylight bulbs and that small the light be about 1" (inch) above the lil one.
Make sure you have a lil "breeze" on it so the stem will strengthen.
Anything else give a yell

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thanks for the quick reply tinytoon! you're right, i'll cover up the RW with the hydroton. is it ok to go from 3 hours of darkness back to none? i'm afraid it'll stunt the growth...
and the light is a 22" florescent grow light i got from walmart, it's kind of a generic version of a florescent grow light you'd see at a hydro store...

ph is now around 5.5-5.8 :)

shouldn't have a problem going to 24/0 and PH looks good. I use to shoot for 5.8 in veg and 6.2 in flower. I know the bulb you are using and if you could find a "Daylight" version of that bulb it would be better, be more like an MH bulb spectrum wise. As for the drip cycle I would think about 30mins +/- every couple hours would be better. As said before RW holds water really well. In fact if you have a extra RW cube soak that sucker and then put it in a bowl or something and check it every so often and you will see what I mean.

I second everything tiny has to say. RW holds moisture veeerrryyyy well. I only flood twice a day because any more and i run into overwatering issues.

Personally i dont like to run my lights at 24/0, ive noticed better root growth during 18/6



your gunna want to bump up the lighting though, any longer and youll notice stretching and your seeds will become very lanky. I would opt for a 6400K or 6500k bulb, it emits more blue light which is more beneficial during the vegetative phase. Plants need the blue light in order to stay short, stocky, and bushy.