My lavender has a trunk, so I was able to plant violas below, and when I repotted the lavender, I had to remove the violas. In lieu, I temporarily tried putting Sedum spathulifolium 'Carnea'. It was nice actually seeing that this sedum has yellow blooms coming from those burgundy edged rosettes. But I had to remove the sedums, I think it is too hot at that side of my garden and there were some violas popping up, must be from old seeds. It was crowding out the sedums.
The Lavender anouk with violas below it:
The Lavender anouk with Sedum spathulifolium 'Carnea'