Mockorange, Mock Orange 'Starbright'

Philadelphus

Family
Hydrangeaceae (hy-drain-jee-AY-see-ee)
Genus
Philadelphus (fil-uh-DEL-fuss)
Synonym
Spacing
6-8 ft. (1.8-2.4 m)
Sun Exposure
8-10 ft. (2.4-3 m)
Danger
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
Hardiness
Bloom Color
Bloom Time
Bloom Time
Bloom Color
Bloom Time
Bloom Time
Bloom Color
Bloom Color
Bloom Time
Other Details
Seed Collecting
Full Sun
Sun to Partial Shade
Fruit Shape
Fruit Size
White/Near White
Fruit Colors
Late Spring/Early Summer
Mid Summer
Growing Habit
Deciduous
Days to Maturity
Seed Type
From softwood cuttings
From semi-hardwood cuttings
Disease Resistance
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
Leaf Type
Foliage Color
Bloom Characteristics
Water Requirements
Shrubs
Where to Grow
Other details
Propagation Methods
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Soil pH requirements
Patent Information
Plant Size (check one)
Growing Habit
Growth Rate
Leaf Shape
Leaf Appearance
Degree to which the appearance is present
Leaf Texture (top)
Leaf Texture (bottom)
Leaf Color
Color of Leaf Margin
Leaf Substance
Number of Vein Pairs
Appearance of Margin
Margin Width
Flower Shape
Flower Fragrance
Does it set seed?
Flower Size
Flower Type
Blooming Habit
Foliage Habit
Color Patterns
Awards (if applicable)
Seed Type
Growth Habit
Days to Maturity
Awards (if applicable)
Patented
Bloom Shape
Other Details
Pruning Instructions
Kernel Color
Flower Shape
Flower Habit
Bloom Size
Color Pattern
Bloom Shape
Pruning Groups
Bloom Diameter
Heat (Pungency)
Fruit Shape
Fruit Size
Fruit Color
Disease Resistance
Seed Type
Flower Size
Size/Type
Flower Characteristics
Leaf Shape/Type
Leaf Texture
Leaf Color
Propagation
Pollination
Bearing Habit
Rootstock Vigor
Disease Resistance
Fruit Usage
Classification
Regional

This plant is said to grow outdoors in the following regions:

Iowa City, Iowa

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Gardener's Notes:

1
positive
1
neutral
0
negative
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T
Montreal, QC (Zone 4b) | June 2021 | neutral

I have had this plant since 2016. It had flowers when I got it. It didn't flower until this year. Growth is miserable, only 2 branches. F...Read More

T
St. John's, NL (Zone 5b) | October 2008 | positive

This hybrid was developed and patented by the Memorial University of Newfoundland Botanical Garden. It received its US Plant Patent in 2007.

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