do not go by what they say is maturity time. Each environment will control the maturity of the plants. SOme will mature early, some late. Can be anything from rh to temps to nutes to lights …stress…Doesn’t really matter at this point. Look at your plants and determine harvest by maturity…your pistils are still pretty white and still growing. I doubt the trichomes are anywhere near ready
On the right side, I see some leaf discoloration…could be the plant starting to use up internal nutrient to fee the buds. You plant looks good but could use some thickening…I would lower my temps a little and increase the dark time an hr or 2 depending on where it is now. If you keep feeding them Nitrogen, they will continue to want to grow so make sure you are on a late flowering schedule for nutrients…Drop your water temperature to about 55°f…Make sure they are getting their amendments - calcium, mag, sul (basically molasses and cal/mag) and the P&K are now the bigger number on your nute usage…Maybe along the way you got a little hot or too much N and they continued veg growth…even autoflowers can extend vegging periods