Veronicastrum virginicum is found from southern Maine to northwest Florida to northern Louisiana up through Minnesota and somewhat north of the Canada–US border. Culver's root is frequently found in wet to wet-mesic prairies and sometimes moist upland sites. It is also found in a good number of prairie or native meadow restorations.The stems are hairless and usually unbranched. The leaves are serrated and arranged in whorls of 3-7 around the stem. The inflorescence is erect with slender and spike-like racemes to about 9 in (23 cm) long, giving the flower cluster a candelabra-like appearance. The stamens are crowded and protrude in a brush-like fashion perpendicular to the raceme. The corollas are white and are roughly 2mm in length. These plants flower for about a month from mid-June to late August, depending on the latitude. In Maryland it blooms in mid-July to mid-August.
Veronicastrum virginicum is cultivated as an ornamental for temperate gardens in the Eastern and Central United States around its native range. This is an easy and adaptable perennial. It is fully hardy down to at least −20 °C (−4 °F), and grows in full sun to part shade and any moist, well-drained soil. If they get too large or crowded, It is easy to dig, divide, and replant. It stays as an upright clump and does not spread far. Plants rarely need staking; however, older clumps may require this. This plant does a limited amout of self-sowing.
This is a striking plant if you like tall, white, elegant, candelabra-like floral displays.
Adapted from Wikipedia