I would recommend trimming your daphne by less than one third this year. Wait however until you see signs of new growth that signals the soil is warm enough to encourage spring growth. Pruning helps to stimulate growth and warm soil helps to stimulate root growth. When it comes to daphne the most important quirk about this fragrant shrub is that it must have good drainage. Loosen the soil in the planting area well and avoid any low spots or areas of clay soil. You can work sand or perlite into the soil at planting time to ensure soil that drains more swiftly. Keep growing, Marianne Binetti