Transplanting is no problem if done gently, roots grow from beginning to last week or so before finish. I found it adds about a week to the bloom period, and the yellowing will stop, If the reason is mostly root binding. Done it many times, saved a prematurely maturing plant. I've even dropped the plant during repotting (in bloom) through her in with fresh soil and broken expose roots, a week later it was tickety boo right to bloom. No nanners, no probs, just an extra 10 days in bloom. Repotting successfully beats the hell out of leafless sticks with tiny buds on them. Regardless, you never know till you try. I assume you are a soil grower, if so feeding is absolutely the opposite of what you should be doing, and the most common shitty advice on these forums. I assume soil, and thats what my experience is with. More specific description will get you better advice. I am uppotting in bloom right now, Start a lot of regs in the bloom room in 2 gal pots (if I want to run a lot of plants (perpetual grow), then flip the females to larger pots and dump and compost the males. Transplanting in veg is favourable, but you have to determine what is best for you. Don't fear repotting.