leaf edges are yellowing

im not sure why the edges of my leaves are turning yellow, i think its from nute burn but ive been giving them less than half-strength nutes and theyve been vegging for like 3 weeks. could it still be from nute burn or what?

looks like nute burn have u flushed with just ph'ed water?

What type of nutes are you using / how much N are we looking at / what's your PH looking like / how often do you flush / how often do you feed? Little more info...

i should probably flush huh? i havent flushed them yet, ive been watering at a little less than half strength for about 4 weeks. pHed em today and its at a little under 6. I flood the tray 3 times a day once after they wake up, once before they go to bed and once in between.

i got them as clones and they were shitty, out of 6 only 2 made it and one of them (left) has taken forever to get going. the other one (right) is lookin good except for the yellowing edges.

o ya and im using canna nutes just the veg formula A & B for now.

Do this test to see if you have heavy salt build ups in your medium:
take straight PHd water (5.5) - run it through the system like you would a regular feeding - then PH test the run off.

The higher the PH of the runoff the higher your salt buildup problem. If the first runoff comes back 6.0 or higher...
PH the water down to 5.5 and do it again right then. You are using hydroton, so you pretty much can't over-water.

Do this on their morning, middle & evening feed. a full day of fresh water will not hurt them. Report back here and
share so we can assess if this is the problem or not.

Follow up questions:
1) What's temp does your room run at usually?
2) Does your hydroton ever get completely dried out? Before either your mid or final feeding: stick your finger down deep
in the rocks (without disturbing roots, and remembering to wash your hands before hand) - how is the moisture level in the
rocks?

Try the flush - report back on the PH runoff test - and let us know where to go.

Thanks bro.

Nah dude - it's definitely salt build ups... Look at what he just said - he is on week 4 and he hasn't flushed yet...
Before you experiment with ANY deficiencies - do a full flush first bro... These puppies need nothing but fresh
H2O if you haven't flushed and you are already on week 4.

so i flushed em with fresh water on 3 waterings, the water would go in with a little under 6.0 pH and come out with a little over, sometimes 6.5. so it was probably the salt build up. ill have to wait and see the new growth. do you think now after the flush if i put them back on half nutes theyll take it better?

Yeah - a day's flush should do the trick. However - get that water to 5.5 PH - bring it down baby. And also - you said that they had been at half nutes - go ahead and hit them with 3/4 the for the next 2 days, and then go up to full strength. Well before I say that - give me a run down on your nutes, and PPMs - you are running too high on your PH - bring it down around 5.5... But gimme the nute rundown and your ppms....

yo dota the flush was great, my new leaves are all lookin bright green, thanks for the advice man. i still got them at 1/2 strength so the little bitch on the left doesnt get over nuted, but next time i change out the reservoir ill put in full strength.
i dont have a meter of any sort so i cant check the ppms. i just use one of those basic ph testers with the drops and the vial.

i got another question tho, i gotta keep the plant on the right down while the left one catches up, what should i do? i started training it sideways a little with some string, should i just keep doing that?

Hey sorry I didn't get back to you bro - been in South America the last couple weeks.
Glad to hear that the flush worked - how are the babies doing on full strength nutes now?
I always like to flush at least every 2 weeks for 1/2 day of watering.

Training is always a great way to increase yields. When you lower the level of your main cola
you allow lower branches to gain domanace through the redirection of nutrients and hormones.
It also provides the least amount of shock to plants - as opposed to topping or super cropping.

I always like to leave my main cola slightly taller than the others to ensure that it remains king
donkey dick. Post up some new pics if you have some time. Your bitches look nice man! Props!

nice, south america where about? ive only been as far south as costa rica but i definately want to take a trip down there sometime.

yea the training seems to have done its job for the most part, that little plant is only like 4 inches lower than the main stem of the big plant so height difference shouldnt be a problem. i took some new pics, the plants are looking super healthy. first 2 pics are from like a week ago, second 2 pics are from yesterday. the growth really took off.