some plants put out more waves of pistils if you let them keep living... nothing bad. have to weight benefit of new layer vs increasingly drastic range of age from early ripened growth to late ripened growth... if it start making larfy little projections (foxtails) def don't wait for that. if they are dense, can be okay, though. get some knobby, dense colas and nothing wrong with that. the twiggy projections suck though. just snip those off while trimming, lol.