Rehmannia glutinosa Seeds | Chinese Foxglove
LATIN NAME: Rehmannia glutinosa
COMMON NAME: Chinese Foxglove
Plant Profile
Among the ornamental and useful plants raised from seed, Chinese Foxglove (Rehmannia glutinosa) stands out as a hardy, perennial in the broomrape family. The Chinese foxglove tufts soft, hairy, wrinkled leaves in low rosettes, pink-and-brown, tubular flowers rising on hairy stalks, and the whole plant carries the fine, neat look of the shaded border. It is a plant of half-shaded, deep, rich, moist, well-drained ground. Plants that offer this much while asking this little are rare enough to treasure.
Science & Biotechnology
Di huang’s chemistry is a lesson in processing. The fresh root is rich in the iridoid glycoside catalpol — around 4 per cent — which has been the Chinese Pharmacopoeia quality index since 2005; drying sharply reduces it, and the traditional nine-steaming of ‘prepared rehmannia’ degrades catalpol almost entirely while generating 5-hydroxymethylfurfural and other new constituents. Catalpol shows hypoglycaemic, neuroprotective and anti-inflammatory activity in laboratory models, acts partly through SIRT1 and GLP-1-related signalling, and a catalpol tablet has been approved into formal clinical trials in China as a new drug. The raw and prepared roots are thus chemically different medicines sharing one plant.
Botanists studying the broomrape family regularly include Rehmannia glutinosa in comparative work, and the species also appears in horticultural trials aimed at gardeners and growers. It retains a following among breeders and collectors, which keeps seed stocks in circulation.
Uses & Benefits
Chinese Foxglove brings genuine presence to the garden and earns its keep across the growing season. The Chinese foxglove is a neat, useful plant of shaded border and study collection. It is a neat, useful plant of half-shaded, deep, rich, moist, well-drained garden. Foxglove seeds germinate well in a light, leafy mix on a shaded shelf. Thereafter it wants only the ordinary attentions any garden plant receives.
Rehmannia root, Sheng Di Huang and prepared Shu Di Huang, is one of the supreme tonics of Chinese medicine, nourishing blood and yin in countless formulas; its catalpol iridoids are studied for kidney and neuroprotective effects.
Growing from Seed
Seed is the natural starting point for Chinese Foxglove, and the process is uncomplicated. Broadcast the seed thinly over a fine, free-draining compost, sieve a little more compost on top, and water with a fine rose. A cool, moist period before sowing helps the seeds wake evenly — a few weeks in damp medium in the refrigerator is the usual approach. Grow the youngsters on steadily in pots until well rooted, then move them to their final positions.
Our Take
Given the right start, Chinese Foxglove is a long-term garden companion. A few weeks of cold, moist stratification before sowing mirrors its natural cycle.
.jpeg "Chinese Foxglove (Rehmannia glutinosa) - picture 2")
Related Reading
Continue exploring with these related plants: