Rough whitlow-grass
Draba scabra
Draba scabra, known as rough whitlow-grass, is a perennial herbaceous plant belonging to the Brassicaceae family. It is naturally found in the alpine and subalpine regions of Europe, where it colonizes rocky outcrops and crevices.
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Rough whitlow-grass
The plant thrives in well-drained, gritty, or limestone-based soils. Excellent drainage is critical, as the species is highly susceptible to root rot if water remains stagnant around the crown, particularly during the dormant season.
Regarding light requirements, Draba scabra is strictly heliophilic. It requires full sun exposure to maintain its characteristic dense cushion or rosette structure. In shaded environments, the plant loses its form, becomes leggy, and loses its ornamental vigor.
Climatic adaptability is one of its primary features, as it is evolved to withstand harsh alpine temperatures and strong winds. However, it requires protection from excessive soil moisture during mild, wet winters, which can lead to rapid decline in domestic garden settings.
Cultivation practices should be minimal. The use of mineral-based substrates rather than nutrient-rich organic soils is recommended. Fertilization is generally not required, as high nutrient levels stimulate soft growth that is more prone to pests and physical collapse.