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From Wing Seed catalog, 1918: DUCHESSE DE CHATEAUFORT— (Neg.) S. soft slaty-blue ; F. dark velvety blue. 25¢. From Wing Seed catalog, 1919: DUCHESSE DE CHATEAUFORT— (Neg.) S. warm lavender, same shade as Albert Victor [beautiful warm lavender], broad, full, incurved; style arms like S.; F. velvety violet, snow-white at base, entire surface veined a deeper shade of lovely velvety violet. Flower large, of splendid shape. 25¢. |
From Farr's Hardy Plants, 1911: DUCHESS DU CHATEAUFORT— (Neg.) S. soft blue ; F. dark blue. 25¢. |
FURTHER CULTURAL INFORMATION |
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Hardiness Zones 4-8 for most varieties, Some cultivars tolerate colder, others tolerate warmer zones (please comment in comment box with your location if this cultivar grows well in zone 3, 4, 9, or 10.) |
Exposure Prefers full sun for optimal performance, may still bloom in half-day shade |
Water: Prefers well drained good garden soil, Tolerant of dry conditions in established plants, Intolerant of swampy conditions. |
PH Prefers Neutral to basic solis 6.1 to 8.5, quite toleranr of more extreme conditions |
Fertilizer Prefers rich conditions on relatively inorganic soils. |