Young AF Fem w/Nute Deficiency: Need help identifying and treating

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Hey all! I'm growing a Mephisto Genetics Hubbabubbasmelloscope and she's showing signs of a nute deficiency. I checked her before the weekend and she was solid dark green, but when I opened the box today the new leaves have light green coloration and curled tips, and some of the medium-aged fan leaves have light, lime-green spots between the veins. If I had to guess (and I'm not good at diagnosing) I'd say N or Sulfur deficiency. Take a look at the following pics:

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(ignore the missing, jagged tips on this leaf; the plant was FIMmed and the fan leaf had its ends snipped while it was barely new)

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I'm running her under a Blackstar 100W UFO LED 24/7, with a custom organic super-soil and rainwater (2 gallon airpot). I'm still a total novice at identifying what she needs, so your advice and suggestions would be super appreciated! She's 20 weeks from sprouting, so there's plenty of time to get her healthy and back on track.
 
:smoking: --- great pics mate! Can you get me a whole plant shot too please?.... yellowing at the very tips like that is usually a immobile nutrient defc. happening, I'm thinking Zn from the looks of it,... best solution is a micronutrient supplement... Fe, Zn, Mn, Cu, B, Mo,... Earth Juice Microblast is good one, but there are several others,....
 
thanks bud! ...yeah, Zn defc. fits best,... being immobile means the plant can't remove it from established older tissues like mobile, or even semi-mobile nute' elements, and pipe it over to support new growth,.. foliar spraying will be the fastest way too,.. got any water spreader/wetting agent? This is a non-ionic surfactant that takes the surface tension out of the solution you're spraying, making it coat and stick more evenly, instead of just beading up and rolling off, and causing other potential problems,... It's critical for foliar treatment! If want to go this route, let me know, and i'll expand on this more,.. . I'm about to sign off for now,...
 
:smoking:Right then! ... Foliar spraying is the fastest way to get stuff into the plant, via the stomata openings, which there are more of on the undersides of the leaves than the tops-! .... feeding, supplements, even systemic treatments can all access right on in,... this can be very handy when dealing with troubled roots/mediums, bypassing the mess, or getting otherwise slow moving nute' elements right to the trouble zones,...

... General rule is, make the conc. of the soln. you spray diluted by at least half of what you'd use for a soil treatment, so if i was treating for, say, Mg defc., and my product says 1T/gal for soil, I cut that to 1/2-1/3 of that for foliar... or, if the label has specific directions for foliar, follow them! For the water spreader, follow directions,... however it's a good idea to play with this some, with plain water, to test and see how it looks and works... ideally, you want just enough in there that you get little to no beading up, but not a slick,overly foamy coating...

... plants in veg you can just hose down! But into budding, foliar is increasingly less desirable due to potential mold issues and residues. When you spray, be sure to get those undersides in particular :thumbsup:-- if you've spray painted before, you know the drill for getting even coating on the surfaces!... to avoid possible lensing burns from HID/LED lights, or Sun, spray and let dry slowly away from direct light (fluoro's won't burn); I like to spray pure water after nearly dry, to redissolve stuff and get a second helping of sorts, in there,... only in aqueous solution does stuff get brought in, so once dry, it's "marooned" on the surface :biggrin:.... just be sure she's fully dry by lights out, to avoid fungal troubles!
 
I'll pick up a zinc supplement and start foliar feeding tomorrow. Before I'd gotten a reply from you, I'd fed it some epsom salts and molasses and buried some galvanized nails and zinc plated frame hangers to try and tide it over until I could get the proper supplies. Here's a couple shots of how she looks today (after a bunch of new growth):

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Looks like Zinc was the problem! Gave her a foliar feeding and watered with a chelated zinc plant food on Saturday, and she's looking MUCH better already. Lush green, only one or two splotches on the leaves TOTAL (not per leaf but in the entire plant) and just a few yellowed tips. I gave her another feeding (foliar and soil) of chelated zinc today and I'm sure she'll be fine by mid-week. Thanks again for the speedy response and great advice!

Have a :slap: on me!
 
thanks bud! ...yeah, Zn defc. fits best,... being immobile means the plant can't remove it from established older tissues like mobile, or even semi-mobile nute' elements, and pipe it over to support new growth,.. foliar spraying will be the fastest way too,.. got any water spreader/wetting agent? This is a non-ionic surfactant that takes the surface tension out of the solution you're spraying, making it coat and stick more evenly, instead of just beading up and rolling off, and causing other potential problems,... It's critical for foliar treatment! If want to go this route, let me know, and i'll expand on this more,.. . I'm about to sign off for now,...
Does this look like zinc? I was thinking maybe N toxicity but heck I don't know! Please help me?
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