Royal queen seeds pineapple kush

hi there i am doing a pk grow at the moment i am now into my 9th week of flower usualy they would b taken down now but there is no sign of the little white hairs changing to brown yet there is nice fat buds with plenty of thc can any one advise me weather to leave them or harvest thanks

also i did give them neutriant burn witch ended up quite bad but they have recovered


thanks for any advice