Mid-Summer to Autumn
This collection of clematis are classed 'late' as they bloom June or later and they have large flowers in contrast to many of the species and their cultivars.
Tips for the Mid-Summer to Autumn clematis.
Many of these clematis prefer a good quality soil with high nutrient levels and a soil which is moist but free-draining. Improve planting holes with at least 2 forkfuls of well rotted manure or garden compost and if you don't have these use a 'Soil Improver' compost. The improvement material added should be placed under the root of the plant not around it. This encourages the roots to grow downwards and remain deep and cool during summer.There is no need to deadhead these clematis, however if they appear to have finished flowering earlier than you expected, there is no harm in giving them a light trim to encourage new growth and a secondary flowering late in the autumn.