Astilbe are hardy to around -20C and therefore don’t require any frost protection over winter. They can be planted straight outside in the spring.
— Soak the roots in water for 3-6 hours prior to planting.
— Plant the roots with the crown or buds just below the soil surface. Any leaves which have grown should be exposed above the soil surface. You can plant directly into a clear, well-dug space in borders or into patio containers.
— Astilbe prefer poorly-drained soil. They do well in moist soils close to water or any moisture-retentive soil. In containers they can be planted in loam-based or multipurpose compost.
— Choose a position which is in shade or partial shade.
— Space the plants 20-25cm apart from each other.
— Water-in after planting and keep hydrated when in growth.
— Deadhead after flowering.
— Cut back stems down to 3cm above soil level in autumn.
— Read further general instructions about planting bare-root perennials