sick ladies:0(

hi guys
This is my first time here, any help would be eternally appreciated


Im using biobizz allmix for my10 ladies in 18 inch pots under two 600 w dual spec and all was going fine for the first 3 weeks of veg and i was just feeding them water out of the tap without adjusting the ph ( my water supply has a ph of 7.0 -7.4) .
then by week 4 I started with biobizz fishmix at 1ml/L concentration and with an adjusted ph of 6.6-6.7, I fed them that with every feed as thjey were going pale and looked like a nitrogen def , a couple of my ladies ( strain is super skunk) are getting necrosis on their older leaves which to me looks like a pottasium def ( pic1) and the other blotches on a few leaves ( nute burn or light stress?)


over all the garden is still pale green but not as bad as a week ago and I have stopped adjusting the ph when i do feed them after realising I'm probably killing the micro organisms in the soil...the feed has a ph of 5.9-6 at a concentration of 1ml/L fishmix and the water coming out at bottom of pots is 6.6 ..so i dont think the ph of soil is bad plus i raised my lights a bit aswell so they look happier.
the ladies are on a 18 hr light cycle and I want to put them in flower soon but need help badly to diagnose and sort the girls first. this is my first grow as well.


(pics 1& 2)

overall state of the garden

Try Epsom Salts at a 1 tsp/gal dilution. The necrotic tissue will not come back but the new growth should look good. Sats and Sat Doms IN MY EXPERIENCE crave cal/mag. They'll devour it. If you can get Botanicare Cal/mag I'd use that. I have used it with great success for the exact same condition during my first couple of grows. I have a much more organic method of adding cal/mag now, but it is very slow release.

Give um a good flush. Then following watering with ph 6.5 with micronutrients. Earth Juice Microblast what I use, all micros cannabis needs with no NPK values. Start flower with half dose flower nutes. Could have some light bleaching, you said you raised light and the girls seemed happier. They dont look too bad though. Looks to be the light or micro deficiency, thinkin iron calcium magnesium, the three work togeather in ways i cannot explain but mainly effect top growth. I hope to have maybe been a bit of help.

That first pic looks like an iron deficiency, see how it's pale at the top?

http://growweedeasy.com/iron-deficiency-cannabis

This is likely caused be your medium PH being too high. If the water you fed it was around 6.0 ph and the runoff was 6.6 ph then the medium is above 6.6 ph which could be the problem.

The second plant pictured is difficult to diagnose but I would try adjusting the PH of the medium at any rate.

Bud Tipps said:

That first pic looks like an iron deficiency, see how it's pale at the top?

http://growweedeasy.com/iron-deficiency-cannabis

This is likely caused be your medium PH being too high. If the water you fed it was around 6.0 ph and the runoff was 6.6 ph then the medium is above 6.6 ph which could be the problem.

The second plant pictured is difficult to diagnose but I would try adjusting the PH of the medium at any rate.

Click to expand...

Can you please explain to the OP (And to me) exactly WHAT science that post was based on? As far as I could read there was never any determination of the actual SOIL pH. Even then, the ranges described wouldn't account for lock out. On what do you base a diagnosis of a deficiency? Certainly not overabundance of P.

Hi guys I'm extremely greatful for all your replies, ive done a soil ph test and it came close to a ph of 7 and my biobizz all mix soil has a ph of 6.6 printed on the bag so I reckon the soil ph is very close to the run off ph of 6.6 aswell. Ive ordered epsom salts but would it be better to foliar feed to be on the safe side or mix it with my tap water and root feed ?

Root feed at this point. Mix with your tap and water it in. You should see the necrosis slow down and all new growth should come in nice.

I've never really foliar fed Epsom, so I have no idea how it would affect them. If you can get to a pet supply store and get some "leafy alfalfa" (rabbit food), soak that in water, preferably aerated, for 24 or so hours that makes a real nice, mild foliar feed for the girls.