Por qué las flores amarillas

Just using up the nitrogen in the foliage. Normal for that stage of life. You want that makes for better smoke. Cheers!

If she's asking for an "haircut" help her out and remove the leaves she's discarding ;) good luck.

They like to do that in the last stage of flowering, Only in perfect conditions leafs will stay green until the end, but many growers like when they absorb nutrients from the leafs thats why it gets yellow and later on light yellow or even white. Your plant has been flowering for like 6 weeks now and only has a few weeks left, i think you will be fine :) Good luck growing :)