Veronica olgensis

Veronica olgensis in bloom on high-altitude screes in Korea
Veronica olgensis

Perennial of the Plantaginaceae family, this veronica is native to Korea and Japan, where it frequents rocks and high-altitude screes. It is a species rarely cultivated, still confidential, but appreciated by rock garden enthusiasts for its carpeting behavior and relative ease.

It forms low and dense carpets, 2 to 5 cm in height, composed of small creeping stems adorned with tiny, deeply lobed to almost dissected leaves, of a shiny dark green and slightly grainy texture. This finely cut foliage is one of the most distinctive features of the species, clearly distinguishing it from other carpeting veronicas with round or oval leaves.

The flowers are pale blue-lilac to light blue, with four petals, borne in small groups that generously dot the plant carpet. The overall effect, during full bloom, is light and delicate despite the density of the foliage.

In its natural habitat, its flowering extends from May to July. In cultivation, it generally blooms in May-June.

It requires full sun or very light partial shade, a well-drained, gravelly soil, neither too rich nor too dry. It readily settles in the crevices of walls and sloped rock gardens, where its evergreen foliage remains decorative outside of flowering.