I suspect a deficiency; what do you think?

Hello all,

I am growing Jean Guy and Corleone Kush. I am running 18/6 light cycle, with a 1000W MH bulb. I am running with soil (B'CUZ soil mix). I have been treating my ferts and water to have a PH of 6.4, assuming that the soil will keep it a couple of decimals higher (my city water PH is 7.5 to 7.8 out of the tap).

It looks like my plants are getting some sort of nutrient deficiency, but can't put my finger on it. I suspect it's a CAL / MAG deficiency, but that almost seems too easy. The bottom leafs are staying dark green, but from the middle of each individual blade of the leaf, it's like it has a dark green gradient in the centre that fades to yellow. One of the leafs has holes in it, and the new growth on top is puny and looks like chicken claws. Does anybody have any idea what could be going on here? Taking a picture of the entire setup, you almost couldn't tell that there was anything wrong until you looked closer.

The light is about 2 to 2 and a half feet above the canopy, I keep the temperature between 72 and 78, sometimes it dips down to 68 in lights out period. This is day 42 since they sprouted from seed.



Any takers on a guess as to what might be wrong?

It should be noted that the last run-of test I did, came to about 6.8.

I'm also watering about every 4 to 6 days, depending on when she gets too easy to pick up. I keep watering them until there is a little bit of run-off at least for me to test.

And one futher addition ---- the fertilizer that I am using is "Technaflora Plant Products - Recipe for Success".

Maybe up the nute dose?

Flush reguarly? could be a salt build up.

I'm not sure but looks like you might be lacking in iron and or cal/mag. Could also be just under feeding a little.

seriously i jus fixed it Fe/iron def which leads to a couple of things bring up some N nutes with the bloom nutes remember use like A percentage of wat ur usin the ff line up with a drop of superthrive an tsp molasses put me back in place seriously read like idid an askd for two days but mines back from the claws an yellowin inside to out from tops

even foilar spray the plant to get that last bit in em only wit lights off tho so lights dont burn

stumps said:

I'm not sure but looks like you might be lacking in iron and or cal/mag. Could also be just under feeding a little.

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I think you're right about under feeding. I am scheduled to fertilize on my next watering, I don't think I gave them enough to drink last time I fertilized them.

Tassie1619 said:

Flush reguarly? could be a salt build up.

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I don't flush regularly because I've only fed the ladies a few times (watering period, fertilized twice). I don't think it's salt build-up, good guess though. I thought something might have been locking out the nutrients but I think the pH is on par now, and I haven't fed it enough ferts to really turn into salts.