All the bright, lurid, low growing stuff is a delicate little weed. I don't know what it is called, it even flowers so is probably a good eco-friendly weed. But it is trying to smother any other plant life. I've pulled it out of other plants but - obviously - not laboured any further. Planting is more fun than weeding. I have added in 3 more Euphorbia Robbiae and 2 mystery plants from a lovely neighbour. The blue foliage looks rather iris-like though I've yet to see it flower. Plenty more to go. If you feel like weeding, don't hold back!