Autumn has very definitely come in the garden, with the trees surrounding the walls turning colour and shedding their leaves. Most of the borders have been cut back except a few such as the beautiful Salvia border which is in full bloom. There are a huge array of salvia varieties, perhaps surprising for a plant whose most common variety is sage, such a well-known culinary herb. Some are tender and take more expertise, indoor space and time to care for them over the seasons.