Marijuana & ttc

Hi my name is Mia , I'm 20 yrs old & my fiancé is 26 going to be 27 in December . He is very healthy and so am I the only thing is my SO smokes A LOT of marijuana more than 8 a day and it's an everyday thing and had been smoking for yearssss . We've been trying to conceive for 3 going on 4 months and no luck yet :( I've been using my ovulation tracker on glow I now have it on track with my periods so going to keep trying but just want to know if him smoking can affect us trying to conceive our bundle of joy .