Horticulture Daphne bholua

1 horticulture

1.1 requirements
1.2 propagation
1.3 cultivars

horticulture
requirements

most cultivars of daphne bholua grow in alkaline or acidic soils, though shallow chalky soils , light sandy soils, dry out in hot weather, unsuitable: steady supply of moisture essential during growing season. position sheltered both full sun , strong winds preferred.

propagation

because cultivated varieties of d bholua flower in winter, tend not produce seed, , seed has short period of viability, must sown after collection, under gentle heat. germination complete within 6 8 weeks. plants sown seed produce first flowers after 3 or 4 years.

most cultivars difficult propagate cutting, being slow root , establish: d. bholua f. alba , d. bohlua darjeeling reported easiest cultivars propagate cuttings.

in view of difficulties of growing seed or cuttings, cultivars have traditionally been propagated grafting cuttings onto rootstock of related species, d. longilobata or d. mezereum, more grown seed. not reliable: plants have grown 8 ten years may die when root system collapses.

in recent years, cultivars have been multiplied micropropagation. micropropagated plants produce suckers, wild species, if main stem dies, suckers ensure plant continue flourish.

cultivars

among more popular cultivars are:

d. bholua var. gracilis ghurka — variety collected seed on milke danda ridge, nepal, @ around 3200 m; particularly tolerant of low temperatures, becoming deciduous @ temperatures below -10 °c. ghurka has distinctive bright tan bark, mauve-purple buds open pale pink flowers; flowers between january , march.
d. bholua jacqueline postill — developed seed of ghurka variety. has similar flowers parent, 12-15 flowers per inflorescence, more evergreen , hardiest evergreen variety in cultivation, reason available , popular cultivar. has gained royal horticultural society s award of garden merit.
d. bholua darjeeling — developed @ royal horticultural society s gardens @ wisley in late 1970s; has vigorous upright habit , produces white pale pink buds , flowers, 5 15 per infloresescence, between november , january.
d. bholua peter smithers — variety can traced seed collected sir peter smithers in daman ridge area of nepal; buds dark red-purple , flowers pink.
d. bholua rupina la — clone collected in gurkha himalaya, in central nepal. deciduous variety, has large leaves , larger flowers other varieties. flowers dusky pink, 3.5–4  in diameter, , there may many 25 blooms on single infloresecence.




^ white, robin (2006). daphnes: practical guide gardeners. portland, oregon: timber press. p. 224. isbn 978-0-88192-752-8. 
^ cite error: named reference pfaf invoked never defined (see page).
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^ daphne bolua jacqueline postill . royal horticultural society. retrieved 23 july 2013. 
^ cite error: named reference lancaster invoked never defined (see page).