I personally think thats a mistake... if you have green leaves you have all the nutrients the plant needs in my opinion even if the plant yellows out the last week or two (which I prefer) they will continue to pull what they need from the green fan leaves so its all about timing it right... plus I mean who doesnt like those fall colors lol
Not that feeding until harvest will absolutely ruin the buds or anything I just find it to be a huge waste of nutrients that can be saved for the next grow... nutes arent cheap I wouldnt use more than needed personally...
Also learning organic growing is beneficial too as you feed the microbes and they feed the soil and you can get away from buying nutrients period... a nice soil mix may cost a bit up front but when considering how much you have its cheaper by far... 50-60$ can get you 1-2 32gal trashcans full of soil which is cheaper then stuff like fox farms by far plus it requires no nutrients so long as you top dress with worm castings and compost and also worm casting teas ect to help microbe life. Just an idea as a nice 10gal pot full of organic soil could grow you a nice large plant with no chemicals... the hardest thing to find would be worm castings and the most expensive too.. I can typically find bags locally for 12-18@ a cubic foot which is a decent amount of worm shit lol. You could also start a worm colony.... but anyhow just figured id put my two cents in. If interested in organic soils let me know I can share some links and give you a nice list of materials needed..
My pics were from a salt based grow btw lol... Ive been doin both lately because well I started off with a dyna gro sample which gave me enough nutrients for years grow after grow for 30$... they no longer offer that sample anymore though unfortunately and it can be pricy... Ill continue doing it both ways until I run out of synthetic nutes and I do like doing it both ways but it really depends on pricing and if you can source quality materials locally or not.