I love shingle in the garden: you can walk on it all year round without getting wet ankles, it looks great in the rain, it's not damaged by frost and snow, and…
They are very frost hardy. They should be planted in loose, moist, well-drained soil with sun or partial-shade. Make sure you water well in the summer.
You can propagate by division.
Pests, diseases or disorders
Usually little trouble from pests and diseases.