There is nothing you can do to slow down the granny`smith or really speed up the honeycrisp unless you can move the latter into a warmer spot. They should have
enough overlap in flowering to pollinate each other since they are in group 3 and 4 respectively. The good news is the grannysmith doesn't actually need a partner so so long as the flowers have not been to frosted you should get fruit on that tree, but the honeycrisp does need a partner so if there are not any other trees nearby you won't get anything from that tree this year. It might be an idea to look at where they are placed, is one spot warmer than the other?