IMO, that plant is actually pretty healthy, with a couple issues.
What I see:
-You just transplanted so the rootbound condition that you probably had before judging by the downturned leaf edges and tips visible on some leaves is taken care of.
-Yellow leaves can be caused also by insufficient light, and you just upgraded.
-Time to start feeding... that's a hungry, nitrogen deficient plant. Since you are only in the first couple weeks of flower, you can feed a grow fert safely. You DO need a complete fertilizer with micros, and be certain that your soil runoff pH reads between 6.3 and 6.8. Give a 'grow' fert or your bloom fert plus a weak dose of fish emulsion until the end of week 2 of flowering to keep that yellow from spreading this early in the game.
You rventilation is correct.
You will need a much larger pot in about 3 weeks, as SOON as your roots have filled that one, so be prepared for that. One gallon per foot of main stem is the minimum.
stinkyattic Reviewed by stinkyattic on . White Rhino YELLOWING LEAVES Naturally I am a little worried, so I decided to post this, in hopes of some feedback. Have 4 White Rhino ladies.....soil grow w/ 400w HPS in my walk-in closet. Started flowering.....and the first oddity I noticed is it tool a good 2 weeks for pestils to show on a 12/12 cycle (from 20/4) which is longer than any strain I have ever grown. Used FoxFarm Open Sesame (1 tsp to a gallon every other watering) and water every other day, 1 1/2 gallons for 4 plants. Everythiong seemed great. Last week Rating: 5