Looking for help to help Diagnose these leaves

I initially thought this was splash back until I saw it again. Any help would be greatly appreciated.

After some research I'm starting to think I may have a P deficiency

(a) substrate: Sunshin advanced mix #4
(b) nutrients: House & gardens (full Line)
(c) additives: Europonic Fossil Fuel
(d) age: Approx week 4 veg
(e) strain: Pre 98 Bubba , Skywalker OG. Black pepper (ghost og x strawberry bubble)
(f) environment: Low 72f / High 82f RH36%

Usernamewastaken said:

I initially thought this was splash back until I saw it again. Any help would be greatly appreciated.

After some research I'm starting to think I may have a P deficiency

(a) substrate: Sunshin advanced mix #4
(b) nutrients: House & gardens (full Line)
(c) additives: Europonic Fossil Fuel
(d) age: Approx week 4 veg
(e) strain: Pre 98 Bubba , Skywalker OG. Black pepper (ghost og x strawberry bubble)
(f) environment: Low 72f / High 82f RH36%

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that would be my guess..why the low humidity? shouldn't you be 55-60?

Info you provided is great, except you didn't mention how much or often you're feeding.
I would say you're right though, that does look like P deficiency.
Any idea what your PH is?
(Your temp is acceptable, don't fret.).

I don't have any clear answers for you but I can say that I've used H&G in Happy Frog soil with at least 20 different phenos of Skywalker without issue so I would rule out the H&G line. What's your Ph at?

Looks like it needs to be transplanted how big is that pot?

Schuylaar: thanks man. Ya I gotta raise my rh

bak: thanks a l0t! Your correct about your ph intuition...

pimp: thanks man. My ph pen an bad.... Just realized this.. I may hit you up for h&g info if that's cool?

resin: yep... Thanks man... I do need to transplant to bigger containers. These were only 1 gal. I now just move to 5 gal
A lot lot

thanks again to those that helped... Super appreciated

I don't have too terribly much to say about H&G. It's worked fine more me using their numbers in the feeding chart for soil and Humboldt's H&G chart numbers for DWC. I don't use the foliar, algen extract, nitrogen boost, or amino treatment and everything goes fine. DO NOT put amino treatment in hydro, it will plug everything all up and make a mess.

Pimpernickel said:

I don't have too terribly much to say about H&G. It's worked fine more me using their numbers in the feeding chart for soil and Humboldt's H&G chart numbers for DWC. I don't use the foliar, algen extract, nitrogen boost, or amino treatment and everything goes fine. DO NOT put amino treatment in hydro, it will plug everything all up and make a mess.

Click to expand...

I've been nervous to use top shooter / shooting powder...

Have you used with favorable results?

I would start with PH and work from there. Comparatively speaking marijuana plants use very little phosphorus, so having too little P in your soil/nutrients is unlikely. You're getting lockout from a ph that is out of whack and it's expressing itself perhaps as a P deficiency.

Shooting powder works great for me, I seem to see a burst of new growth after I use it, it can cause foxtailing but more but is more bud.