What is the best way to plant this Clematis
It's a summer flowering type, known as a 'group 3'. Clematis are hungry plants, so prepare a deep hole and incorporate a lot of organic matter such as well rotted manure and compost. Plant it about 3-4 inches (10cm) lower than the pot it came in.
Cut it back every year in about February to the lowest pair of buds, or about 6 inches (15cm), whichever is lower. Feed about once a month in spring and summer with a proprietry clematis food or a general fertliser.