They're fine to be crowded in, if you want to keep the cultivars separate its best to plant things that don't look the same next to one another - I planted these semps 1.5 years ago with space in between each cultivar
I have 4 of these foot deep troughs that I used for semps
I use slate pieces to keep some of them separated and to keep shade in summer
some of these are repeat pics, sorry...they're still pretty and show what I mean!
Enjoy!!
