Easily grown in average, medium, well-drained soil in full sun to part shade. Avoid wet, poorly drained soils. Plants may be trimmed back after flowering to revitalize and to encourage new foliage growth, with a resulting sparse and intermittent rebloom possibly occurring in late summer to fall.
This speedwell (sometimes commonly called Austrian speedwell or Hungarian speedwell) is a compact, mound-forming plant with upright to sprawling stems. 'Crater Lake Blue' features short, dense, 2-4" long racemes of tiny, saucer-shaped, intense gentian blue flowers (1/2" across) which appear in the upper leaf axils of upright flowering stems typically rising 12-15" tall. Blooms in late spring to early summer. Narrow, ovate to oblong, entire to toothed, dark green leaves (to 1.5" long) resemble those of germander, hence the subspecies name. Synonymous with and sometimes sold as Veronica latifolia or Veronica teucrium.
No serious insect or disease problems.
Rock gardens or border fronts.
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Missouri Botanical Garden
4344 Shaw Blvd., St. Louis, MO 63110(314) 577-5100 hours and admission
Butterfly House
Faust Park, 15193 Olive Blvd. Chesterfield, MO 63017(636) 530-0076 hours and admission
Shaw Nature Reserve
Hwy. 100 & I-44 Gray Summit, MO 63039(636) 451-3512 hours and admission