Natural remedies for men's fertility

Hi ladies!

I was wondering if there are any sort of natural fertility teas or supplements for men? I was already planning on trying to get him to take some vitamins, I just don't know if he'll remember every day lol. Just looking for any sort of teas, diet changes or natural remedies that can help increase sperm quality/life. We were told back in January to do a sperm analysis and my boyfriend won't go get it done for some reason. But I'm 98% sure that's where our problem with TTC lies. Ive been checked, double checked, triple checked with everything. I'm not the problem and I'm Ovulating just fine.

Any sort of suggestions would be appreciated, preferably something on the more affordable side as well.