Viola coronifera W.Becker
Viola coronifera is one of the Violas with leaves arranged in a rosette. The rosettes are flattened, solitary or few to several, up to 4 inches (10 cm) tall and up to 2 inches (5 cm) in diameter. The leaves are green, ovate and up to 0.3 inch (0.7 cm) long. The flowers are 5-petaled, bright yellow-orange, located at the base of the leaves and form a crown at the top of the rosette, hence its species name. They appear in late spring to early summer.
USDA hardiness zones 7a to 11b: from 0 °F (−17.8 °C) to 50 °F (+10 °C).
How to Grow and Care
Many of the high Andean species are known as Rosulate Violas. They are a group of perennial Violas in which the leaves form a tight rosette, rather like Sempervivum or some of the Saxifrages. However, the flowers appear at leaf level in rings around the outside of the rosette.
Rosulate Violas have a reputation for intractability in cultivation, but it is now known that at least some species can be grown to flowering size by skilled growers.
A main problem is etiolation, elongation of the normally compact rosettes, in the poor light values of the lowland northern temperate zone. Cool conditions, a sparse but adequate diet and as much light as possible are essential. It is known that in any batch of seedlings some individuals will quickly etiolate, others may not. So there is some scope in selecting plants more likely to grow satisfactorily in cultivation.
Learn more at How to Grow and Care for Rosulate Violas.
Viola coronifera is native to Argentina.
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