Philadelphus coronarius (Mock Orange)


Michael's Opinion

This is a great shrub if you enjoy an abundance of fragrant flowers. The orangy-blossom fragrance is very fresh. I like this shrub but prefer the cultivar 'Aureus' as its foliage is a golden yellow as opposed to the straight species.

Botanical Information

FamilyHydrangeaceae
GenusPhiladelphus
Speciescoronarius
CategoryWoody
TypeShrub (deciduous)
ReferencesDutchmaster Nurseries Ltd, Pickering, Ontario.
OriginCultivated in 1560, native habitat Southern Europe and Asia Minor.
Pronunciation

Details

USDA Hardiness Zone4-8
USDA Hardiness Ref.
Canadian Hardiness Zone3
Canada Hardiness Ref.
RHS Hardiness Ref.
Temperature (°C)-35
Temperature (°F)-30
Height3-3.5 m
Spread3-3.5 m
GrowthFast
Flowering PeriodMay

Description and Growing Information

General DescriptionLarge, vigorous, easy to grow, rounded shrub yielding clusters of very fragrant white flowers. Leaves are a dark green. Flowers for 2 weeks a year, with highly scented blooms with a refreshing orangey perfume.
ID CharacteristicFragrant very attractive white flowers. Bark is reddish brown and exfoliating.
ShapeMedium to large shrub, very rounded with straight branches that arch with age.
LandscapeHas a very sweet scented, white flower. Not recommended for modern gardens; some of the floriferous cultivars are more suitable since they are smaller in stature.
PropagationSeed sown or take softwood cuttings in June/July, or hardwood cuttings in autumn or winter.
CultivationNot particular to soil types, transplants readily, prefers full sun or light shade. Optimal soil would be moist, well drained, and supplied with organic matter. Prune by removing old wood after flowering. Can be cut right to the ground at this stage. Root systems are extensive and can get massive.
PestsLeaf spots, rust, aphids, powdery mildew, canker, nematodes and leaf miner.
Notable SpecimensBayfield Public Library, Bayfield, Ontario
HabitatPrefers a moist, well-drained soil, full sun or light shade. Grows in the deep woods in the wild.
Bark/Stem DescriptionOrange to reddish brown; exfoliating.
Flower/Leaf Bud DescriptionSolitary, fixed in one place, lacking terminal dominance, with 2 nearly valvate, mostly hairy scales.
Leaf Description4-10 cm long , 1.5-5 cm wide, dark green foliage. Opposite growth pattern, simple, ovate to ovate-oblong, rounded at the base, slightly dentate. Sometimes shows comatose on the veins, has a hairy petiole.
Flower DescriptionPerfect; with 4 petals, 4 sepals, multiple stamens, very fragrant ,white, 2.5-4 cm across. Flowers from May to early June.
Fruit DescriptionPersistant four-valved dehiscent capsule with many seeds.
Colour DescriptionGreen leaves with white flowers, orange to reddish brown bark; exoliating white with age.
Texture DescriptionA bit coarse during all seasons.

Photographs