Alchemilla also looks good as a contrast growing around the base of a Cotinus "Royal Purple", the strong lime green contrasts with the purple. The contrast is good but be aware a Cotinus is potentially a large shrub, 3 meters plus, although it can be kept in check by pruning. Alchemilla also look good combined with the soft blue of Nepeta (Cat Mint) a nice mix of blues with lime green/yellow and both flowering in June.
A down side of growing Alchemilla is that it is a big self seeder which some gardeners may find a problem, and it can be a chore to weed out where you don't want it. I have seen Alchemilla planted to good effect growing at the base of a copper beech hedge and Alchemilla looks good along a path. Alchemilla comes into leaf early in the year and so can look tired by July, with brown spots and fawn areas marring the foliage, as in the image below left. An easy solution is to take the shears to it; either a complete haircut, cut it partially in stages and new clean foliage will be up and sprouting within a couple of weeks maximum and look good for the rest of the growing season. It will not flower again but it will produce fresh looking foliage.
This is illustrated in the images below, the first shows the Alchemilla if full bloom looking really good, and then some weeks later when the foliage is looking sad, bit tired and brown. I cut it back and within a short period of time, about 2.5-3 weeks, it had re grown some new fresh foliage.
Alchemilla mollis is a simple plant, which is why there is not much to say about it. It is easy to grow, unfussy about it's conditions and although a number are listed in the RHS encyclopedia of plants you really only see A. mollis for sale.