guys can you help with this, is this a ph prolem?...i'v grown these heavy duty fruity from seed and its taking forever due to slow growth.
you can see the banding on the leaves at the top, ive gone from 0.4 to 1.2 ec thinking its a problem with not enough on the nutes.
i'm using celmex and my ph was between 6.0 and 6.4...im using vinegar to ph the water...iv brought the ph down to 5.8 now but iv yet to
see what happens...the banding on the leaves is slow and gradual, leading to them eventually dieing at the bottom of the plant.
Click to view attachment

my money's on a Mg deficiency... how you fix that in hydro i don't know but epsom salts are soluble mg and sulphur.

Hiya


Looking at the whole plants it appears to me as if there's some yellowing lower-down so I'd agree that underfeeding is a possibility.

Is the EC staying constant at 1.2? Also when did you increase the EC? (IME it can take plants a couple of days to respond)

AFAIK reputable hydro nutes will contain all the Mg that your plants need - adding more might complicate things rather than sorting them out...

ATB

Stan

I'v been at 1.2 for a good week or so, i was thinking that 1.2 should be enough for plants of this size, and that there surely cant be any underfeeding.
i'm using Vitalink max 2 part nutes, and i'v just watered again at 1.2 with the ph bang on 5.8 constant insted of having it drifting around between 6.0 and 6.4 maybe that will do the trick.
Its not like the plants are goin down the hill rapidly, so am gonna try things gradual.

I guess the gist of my post was to encourage you to continue 'reading' the appearance of the plants - you may be thinking one thing & coming to a conclusion, they may be telling you something else

Have you grown the strain before successfully? If so what EC worked last time? What's the EC of the water straight from your tap/supply?


Can't argue with that...

ATB

Stan

From the tap EC is on the first rung of my trunction meter at 0.2, ph is 7.1 i havent grown this strain before, i'v been looking at the grow FAQ on the site and it seems to advize a ph under 6.0 rather than over (if i'm understanding it correctly).
This is my first time with hydro i usually grow in soil, gonna make sure i get the basics right with the ph and if i get no joy i will up the nutes, but i know what you mean about the wrong conclusion. mistakes i'v made in the past has usually come from altering to many things at once do that an yer sunk .

Sounds like you're onto it mate!

Yep - pH in hydro errs on the lower side - 'tween 5.4 - 6.4, ideally 5.6-5.8. I think coco has a slightly higher sweet-spot... 6.2 according to Owd's experience I think...

Your EC is about that same as mine would be at that stage - but isn't a very reliable measure as your plants & set-up are different to mine...

Some basic hydro guidance (including EC & pH guidance) if you've not already seen it: http://www.uk420.com/boards/index.php?s=&a...st&p=793251

Hopefully someone else will be along soon...

Cheers

Stan

E2A - Welcome to the wet side...

Yep stan Plants are looking better already an and i swear they have grown in just 18 hours, gonna give it a week or so and i will post some pics, might come in handy for someone just startin with hydro and havin the same problems.

I think it could be a calcium deficency, possibly caused by a high ph and low EC.

If you are keeping the ph above 5.8 you will probably lockout calcium from your plants.

I would raise the EC to 1.4, and set the ph to 5.5 and lower it when it reaches 6.0 (back down to 5.5).

Try this and check them again in 3-4 days.

Use your photos in this post to compare, makes things easier to see if things have improved.

Theres a big inprovement already since i started keeping the ph at 5.8 and EC 1.2, its only been a day so i will go a couple more days like that then work towards those parameters if its needed.
Thanks Stealth