How to prune thunbergia grandiflora

After the main flowering flush, typically late autumn to early winter in the tropics; or early spring before new growth. Cut stems back by one-third to one-half, cutting just above a node or lateral branch. Remove crossing, crowded, or dead stems entirely. Tie remaining stems into their support to prevent wind damage.

Once or twice a year, after flowering and/or in early spring. Blue sky vine is a vigorous tropical climber that needs regular pruning to stay manageable. Prune after the main flush of flowering to reduce bulk and encourage fresh growth. In frost-free climates it can become invasive — cut back hard once or twice a year. As a houseplant it benefits from a post-bloom tidy.

Cut stems back by one-third to one-half, cutting just above a node or lateral branch. Remove crossing, crowded, or dead stems entirely. Tie remaining stems into their support to prevent wind damage.