Cotton lavender ( Santolina chamaecyparissus) is an attractive plant with golden-yellow flowers and silvery, aromatic, ferny foliage. The leaves are evergreen and help provide useful structure and colour in the winter garden. While deadheading the plants in late summer won’t promote further flowering, it will help maintain a dense, compact and tidier plant. Remove dead leaves and cut faded flower stems back to about 12.5cm (5in). You can also use the opportunity to take cu ings from non-flowering stems and grow them on in the greenhouse over winter as insurance plants, because some varieties are borderline hardy.