having some problems

[fkmiller]

i'm a week and a half into flower and this has shown up a few days back. I've been having problems with height and also had fluctuating ph and ec past few days too. i'm going to change res tonight when lights go on. is this nute burn or light burn or something else.it's only a few leaves and they don't feel crispy.rather a smooth kinda thinness about them where its yellowing.anyone any ideas? they all look healthy enough apart from this.my ph goes between 5.8/6.2, and ec is 0.7 atm.i started at 1.1 but it kept rising till i got it down to 0.7 where it has stayed.growing in clay pebbles in a 4 pot 11litr Wilma.

[fkmiller]

i'm a week and a half into flower and this has shown up a few days back. I've been having problems with height and also had fluctuating ph and ec past few days too. i'm going to change res tonight when lights go on. is this nute burn or light burn or something else.it's only a few leaves and they don't feel crispy.rather a smooth kinda thinness about them where its yellowing.anyone any ideas? they all look healthy enough apart from this.my ph goes between 5.8/6.2, and ec is 0.7 atm.i started at 1.1 but it kept rising till i got it down to 0.7 where it has stayed.growing in clay pebbles in a 4 pot 11litr Wilma.

sorry forgot to add photies.here they are.

[fkmiller]

does anyone have any ideas what the problem is here? I've changed the res and reduced the nutrients but am still getting this sporadic yellowing on certain leaves.ec is 1.0. ph is sitting at 5.8/5.9. i'm using aqua flora a+b,sensi-zym, carboload and iguana juice. i'l be 2 weeks into flower come sunday.

[M_C]

Hi mate, fill this in...

Soil or hydro or coco:

Strain:

Photo or Auto:

plant age:

pot size:

has it been repotted? and when?:

soil type:

nutes or additives used and how often for soil:

Air temps (max min):

Res temps (max min):

humidity:

lighting type and wattage (hps, led, cfl):

Light schedule:

ph level:

EC (hydro and coco only)

Background EC.

feed schedule and nutes (for hydro and coco)

anything else you think may be relevant!

And a pic or two of the whole plant with lights off would help too

[fkmiller]

hydro grow
cheese
photo
age will be 6 weeks come sunday
pots are 11 litres in 4 pot Wilma
not been repotted,growing in rockwool
using 70ml canna aqua A+B, 40ml sensi-zym, 40ml carboload and 40ml iguana juice.i have a 30litre res and mix my nutes as if it was 20litres
air temp 68/86. res temp 17/22. humidity 30/60
light is a 400w hps
light schedule is 12/12
ph levels are 5.7/6.2
ec starts at 1.0 in new res and settles at 0.7
background ec is 0.0
I feed them the above in a new res and thereafter mix the nutes with 10 litres of water accordingly every 2/3 days
only real problem up till now apart from this yellowing has been the height of them. i'm tying the taller ones back from the light but still only 12 inches away from it.they look okay apart from this yellowing on the leaves.i'm having to leave my tent open with lights on as the temps were in the 90's.with door open it hovers around 78/82.
hope this helps and someone can give me a heads up.

[fkmiller]

[fkmiller]

I've been trawling this site and the web looking for answers to this problem.could it be potassium deficiency? would pk 13/14 help with this?

[M_C]

Got a pic of the whole plant?

[fkmiller]

no don't have a pic of whole plant atm.i'l get some at lights on.the photos I've posted are the only parts of the plants that has this problem.

[Jingo]

You'll need a couple readings each day of EC and pH and water level for us to help you also.

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