Wedding party clothing

Your fiancé should choose his side's attire as men know suits more intimately. I think if a couple were asking their friends to purchase wedding attire, it's practical and economical to find attire they will rewear. Some only consider the bridesmaids, but men's suits are 2.5- 3x more expensive than dresses. Thus, if men of the groomsmen's age wear khaki suits in the Pacific Northwest, then this would be suitable. On the flipside, I don't often see this color on my east coast male colleagues. Good luck, your garden-esque wedding sounds lovely.

I think the mismatched bridesmaids in the pictures you shared look lovely and fit really well with the garden party theme. I love the personality that it brings! For the groomsmen, I agree that black and dark green together would look odd, and the tan/khaki fits better with your theme and the colors that you've chosen for the bridesmaids.

There's nothing wrong with a pastel color palette. I'd put all the men including the groom in gray suits if it was me. That would also be a lot more versatile down the road regardless of who is buying the fabric.

I agree with CM! I attended a mismatched wedding a few years ago in Newport and the men were all in khaki pants with navy blazers/the same ties while the girls were all in the same color palate but mixed between patterns and solids. Mixing different fabrics can be tricky, but still definitely doable with a good eye. We are also doing mismatched for our wedding, and I gave my bridesmaid's an online account with ideas for them to go through, but ultimately said the style is up to them as long as it's within the color palate!