Verbena Bonariensis is a Perennial also known as Purpletop Vervain, South American Verbena, tall verbena, clustertop vervain, or pretty verbena. Very tall spikes of rosy-purple blooms from Spring through Fall, it grows 4-6 feet high by 2-4 feet wide, but is airy in appearance, rather than a solid mass. It loves Full Sun, but will be fine with partial shade and is Drought Tolerant (once established), with low watering necessary. It is hardy to 10-15° F. Leaves are dark green and stems are rough in texture, with 2-3 inch flower clusters. Verbena bonariensis will tolerate heat and dry conditions but is also fine with more regular irrigation, such as near your lawn.
Bees seem to love these tall flowers and the plant offers great background interest against walls and fences, without becoming a massive presence since the foliage is usually only about 12 inches high. The rest of the plant height noted comes form the flower spikes. It will reseed itself, especially with heavy watering, but is easy to remove the volunteers if you don’t want them. It is originally from Brazil and Argentina, where this plant was reportedly discovered in 1726.
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