If they are already rooted, then plant out now if the spot is sheltered from the wind.

Thanks for your response but I meant to say unrooted cuttings of Laurel and Buxus.

Ah, just starting them then? I would wait until early spring, about 6-8 weeks before the last frost. Keep the rooting medium between 18º and 24º C for the Buxus and Cherry Laurel (Prunus laurocerasus), and about 4º warmer for Sweet Laurel (Laurus nobilis).

Many thanks