The boxwood doesn't grow that fast by far. A cut once a year is the most, and only if you want it to look artificially shaped and smooth/shaved. The natural growth look is way better in my opinion. I have to agree on the smell of the boxwood though: it isn't very tasty, overall when the air is hot. But I still prefer it to the thuya's smell, I can't stand that and was near to be sick when I trimmed the edges, not even speaking shredding it, awful.