Depends on which cuttings sandyv but in general, commercial growers use bottom heat and misting for lots of types, especially clematis. I have a heated bench and get great results (eg 100% for 12 viburnum cuttings last year) but you do have to watch for them drying out.
A trowel in the hand is worth a thousand lost under a bush.
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Depends on which cuttings sandyv but in general, commercial growers use bottom heat and misting for lots of types, especially clematis. I have a heated bench and get great results (eg 100% for 12 viburnum cuttings last year) but you do have to watch for them drying out.