In one of the International Rock Gardener there is a photo of a ground hugging P. minima in full sun. When I bought mine I was told to give it half shade. They are 5cm / 2cm high. They obviously need more sun. The trough they are in gets full sun from now as the sun moves east, as spring progresses, but the sun moves to the front of the house around 10.30am.
Where should they be grown? When can I take cuttings?