Bougainvillea x buttiana 'Barbara Karst' Bougainvillea 'Barbara Karst' Previous Next. A very popular hybrid Bougainvillea, 'Barbara Karst' is a free-flowering, vigorous, evergreen shrub or vine with particularly eye-catching clusters of bright red to magenta-red, papery bracts surrounding tiny white flowers.
Good drought tolerance once established, but will look better if watered during dry spells. Water freely in summer and sparingly in the winter.
Regular pruning may be required to keep inbounds or shape the plant. Always prune this plant immediately after flowering. Be aware that repetitive pruning may reduce flowering as this plant flowers on new growth. Pinching the tips of new growth will encourage branching.