Pin the tail on the Donkey - or cut it off?

This is what Euphorbia myrsinites looks like in my garden on March 19th. The nick name of this plant is Donkey's tail and I can kind of see why.

The bloom is very subtle, but it looks so wonderful cascading over rocks, gravel or down a hill.

A number of years ago I was in Minnesota in November and the gardener that I was visiting had this in her garden. She dug me two pieces and I brought them home. I had learned not to be shy if I saw something in masses in other gardens and I will ask for a piece if the moment is right.

Last year I actually bought more since my original plants have given me only a handful of seedlings.

Here's my question of the day. Do you grow this plant and if so, do you cut those long scraggly tails back in spring?

Now I need to get ready so I can photograph yesterday's purchases and play with them too.