many opinons on weather a flush is needed or not. if you want to flush then flush away. i havnt used mollasses in a grow yet but i think you can still use it.
you dont go by the hairs. you go by the trichs. read this. https://www.rollitup.org/view.php?pg=faq&cmd=article&id=149
during the last 2 weeks is when the buds will swell to like twice their size, so i would say yes to still growing.