Newbie Someone please HELP

Ok so I have an attitude Candy Kush auto going. My grow room is 3x3x5, passive intake 4inch exhaust with a hom made carbon filter. My medium is 1 part perlite 2 part ffof 2 part ffhf. I'm usimg ff nutes and blackstrap. My feeding schedule is water,nutes,blackstrap. I was watering every 5 days but now its down to every 4 days. She's in a 5 gal container. I usually water 2 gallons until I get about 10-20% runoff. I ph my water with vinegar. I feed 1 tsp of blackstrap for every gallon and 1 tsp of nutes per gallon. Right now my girl is at day 52 and she's an auto. My temps usually run high as 83 lights on 70 lights out. My humidity is within 50 to 60% range. So 2 questions. Does my plant look developed where it shoud be for a 52 day auto. The buds and cola looks small, and also I noticed some spots and yellowing of about 5 of the biggest fan leaves in the middle of the plant. Can someone help me on both of these questions? Pics are attached.

Leaf

Leaf

Plant

Bud

Cola

Im confused on your feeding....do you follow the FF feeding schedule with all the FF nutes?

I feed the grow big veg nutes during vegging. 1/2 tsp every other watering. Wasn't giving blackstrap during veg. Week 6 I started blackstrap. Now I'm using ff bloom nutes.

1. You are over watering, give it just 1 gallon instead of 2.
2. Follow the feeding chart, you arnt giving it enough nutes thats why you are having some deficiencies.
Inner yellowing of fans usually sign of cal mag deficiency. Thats really one thing the FF line doesnt come with is cal mag
when you have an N or cal or mag deficiency it usually triggers a domino effect of all 3 lockouts N/Cal/mag. Get those in her asap. Pull the yellow leaves to see if it persists.

Sound advice...

Will do. I did researh and I found some info about that. Was hoping that someone could confirm that and you just did. Thx. The hydro store is closed but I will get some tomorrow for sure. Also do you think the plant bud and size is where it need to be at 52 days of an auto. I read that candy kush auto tend to run as long as 80 days. I will give her whatever time she needs to get ripe, but I'm hoping the buds will swell much bigger than they are now. What u think

the buds will get huge ( comparatively) if you give it some actual light. a minimum of 400 watts HPS for flower, there really is no substitute other than mother sun.