Primula 'Ostergruß'

The primroses of the Pruhoniciana group are complex hybrids resulting from crossings mainly involving Primula vulgaris, Primula juliae, and Primula elatior, mostly selected in the first half of the 20th century, notably in the botanical gardens of Central Europe. They are distinguished from juliana stricto sensu by a generally slightly more developed habit, larger leaves, and often larger flowers. 'Ostergruß', whose name literally means "Easter greeting" in German, is an old cultivar whose exact origin remains difficult to specify with certainty.

The plant forms a low and compact rosette, 8 to 12 cm in height when in bloom. The leaves are oval, dark green with a slight bronze tint, with a distinctly bullate surface and crenate edge. The flowers are remarkably large for the group, of an intense and deep violet-blue, with a bright yellow eye surrounded by a well-marked orange ring; this chromatic contrast is one of the most striking features of this cultivar.

In cultivation, the flowering extends from March to April. The plant prefers cool, humus-rich, well-drained soil, in partial shade or filtered light. It withstands winter cold well and is suitable for rock gardens, woodland borders, and container culture.