March Plant of the Month
Rose Vervain or Verbena suggested by Liz Soutendijk
I first encountered this native of east Texas during a brisk morning walk in March on one of our paths at the edge of the woods. I was caught by a surprisingly fragrant odor and literally sniffed my way to the flowers. I found them to be sparse, even though there are many clumps spread out along the edge of our woods under dappled shade when the trees are in bloom. However in a cultivated garden they make a wonderful ground cover. You can create dense 5-10 inch high mats.
Family: Verbenaceae (ver-be-NAY-see-ee)
Genus: Verbena (ver-BEE-nuh) or Glandularia (glan-doo-LAIR-ee-uh)
Species: canadensis (ka-na-DEN-sis)
Category: Groundcover 
Height: 6-12 in.
Spacing: 18-24 in.
Hardiness: USDA Zone 6b to 10b
Sun Exposure: Full Sun but will bloom in partial shade.
Bloom Color: Purplish
Bloom Time: Late Spring through fall, occasional blooms in mild winter
Foliage: Semi-evergreen
Other details: Drought-tolerant; suitable for xeriscaping, early nectar source for butterflies.
Propagation Methods: By dividing the rootball, from herbaceous stem cuttings, seed.