Clarkia speciosa Pink Buttercups Seeds Ref: TM01401262 SowingSow in spring where they are to flower in well cultivated soil. Sow thinly 6mm (¼in) deep in drills 30cm (12in) apart. Clarkias sown in late summer/autumn and overwintered in a frost free greenhouse make excellent spring/summer flowering pot plants.GrowingThin out seedlings to 30cm (12in) apart.Aftercare Clarkias prefer a deep, rich soil and will grow in sun or part shade. Remove the flower heads as the petals fall to prolong flowering.FloweringSummercroppingPlant typeHardy Annual Price: £1.99 Quantity: