To Feed or not to Feed...that is my ?

Its an auto critical jack ala dina fem, 4 weeks old today. 3 gal pot, pre-nuted dirt, and mg sticks ( I didn't plant it) Started flowering about 5 days ago and is currently putting on budsites like crazy. Starting to show what I believe are minor deficiencies. New growth very lime green (not sure bout that one) got a few stems starting to show purple, and a few leaves with a few spots (last pic). I picked up a GO BOX, but I'm a little sketchy about using nutes. Also no PH meter yet, gonna order one this weekend. I was leaning towards a veg feeding, but it being an auto I thought I'd ask first.

I think she's hungry, but not sure how to go about our first feeding ( if necessary).
Recommendations appreciated. Its watering day today, got a few hours, otherwise will reassess Friday.
Thanks all

Yes she will be hungry, what nutrients do you have?

The GO Box is general organics entire line 8-16 oz bottles, Bio thrive grow and bloom, calmg+, bio root, bio weed, bio bud, bio marine, and diamond black. Seemed like a good buy @ 35$.
Also forgot to mention light source is CFL... about 250 watts actual, varied spectrum.