• Photo of Hydrangea (Hydrangeas)

Plant Profile: Hydrangea

Taxonomy: Hydrangea

Names

French Hydrangea, Mountain Hydrangea, Oak-leaf Hydrangea, Peegee Hydrangea

  • Photo of Hydrangea (Hydrangeas)

Phonetic Spelling:hy-DRAN-jee-ah

Genus:Hydrangea

Species:

Family:Hydrangeaceae

Hydrangeas are shrubs that lose their leaves in the fall, characterized by their flowers that grow in rounded or umbrella-like clusters. These blooms can be found in shades of white, pink, blue, or even purple. The color of the flowers is influenced by soil pH: blue flowers indicate acidic soil (with a pH below 5.5), while pink flowers suggest alkaline conditions (with a pH above 6.5). If your soil falls somewhere in between these two ranges, you are likely to see purple flowers.

Hydrangea Feature Summary

Hydrangea Image Gallery

Tags

#purple
#white
#showy flowers
#poisonous
#blue
#white flowers
#purple flowers
#pink flowers
#showy
#blue flowers
#cut flowers
#native garden

Similar Plants

Hydrangea Feature Summary

Fruit
Less than 1/2", oval, capsule, shaped like a cup, dry and hard. Winged seeds insdie.
Brown/Copper
< 1 inch
Flowers
Terminal, round or umbrella-shaped corymb clusters in colors of white, pink, or blue (or sometimes purple). Flowers are 4- 5-parted. The sterile flowers (around the margin or the entire cluster) are much enlarged. Bloom time varies per type but generally blooming falls between spring to fall.
Pink
Purple/Lavender
White
Blue
Spring
Summer
Fall
4-5 petals/rays
Star
Cross
< 1 inch
Leaves
Leaves are opposite, simple, stalked, pinnate venation, 4"-8" in long, toothed and sometimes lobed.
Lobed
Serrate
3-6 inches
Bark
Not particularly showy
Light Brown
Poisonous to Humans
TOXIC ONLY IF LARGE QUANTITIES EATEN. Nausea, stomach pain, vomiting, and sweating.
Hydrangin, a cyanogenic glycoside
Leaves
Stems
Flowers
Bark
Whole Plant Traits
Shrub
Poisonous
Multi-stemmed
Rounded
Mounding
Coarse
Cultural Conditions
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Acid (<6.0)
Alkaline (>8.0)
Neutral (6.0-8.0)
Occasionally Wet
Mountains
Piedmont
4a
4b
5b
5a
6a
6b
7a
7b
8b
8a
3a
3b
9a
9b
Clay
Loam (Silt)
Sand
Stem
Brown/Copper
Green
Red/Burgundy
Gray/Silver
Landscape
Cutting Garden
Pollinator Garden
Cottage Garden
English Garden
Border
Foundation Planting
Hedge
Mass Planting
Walkways
Woodland
Naturalized Area
Houseplants
Pollinators
Poisonous to Humans

Hydrangea Attributes

Hydrangea: Country Or Region Of Origin

USA, Asia

Hydrangea: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Hydrangea Fruit

Hydrangea: Fruit Description

Less than 1/2", oval, capsule, shaped like a cup, dry and hard. Winged seeds insdie.

Hydrangea: Fruit Type

Achene
Aggregate
Berry
Capsule
Caryopsis
Drupe
Follicle
Legume
Nut
Pome
Samara
Schizocarp
Siliqua

Hydrangea: Fruit Color

grass
Brown/Copper

Hydrangea: Display/Harvest Time

Fall
Spring
Summer
Winter

Hydrangea: Fruit Length

< 1 inch
1-3 inches
> 3 inches

Hydrangea: Fruit Width

< 1 inch
1-3 inches
> 3 inches

Hydrangea Flowers

Hydrangea: Flower Description

Terminal, round or umbrella-shaped corymb clusters in colors of white, pink, or blue (or sometimes purple). Flowers are 4- 5-parted. The sterile flowers (around the margin or the entire cluster) are much enlarged. Bloom time varies per type but generally blooming falls between spring to fall.

Hydrangea: Flower Color

filter_vintage
Blue
filter_vintage
Pink
filter_vintage
Purple/Lavender
filter_vintage
White

Hydrangea: Flower Inflorescence

Catkin
Corymb
Cyme
Head
Insignificant
Panicle
Raceme
Solitary
Spadix
Spike
Umbel

Hydrangea: Flower Value To Gardener

Edible
Fragrant
Good Cut
Good Dried
Long Bloom Season
Long-lasting
Showy

Hydrangea: Flower Bloom Time

Winter
Spring
Summer
Fall

Hydrangea: Flower Petals

2-3 rays/petals
4-5 petals/rays
6 petals/rays
7 - 20 petals/rays
asymmetrical petals
Bracts
Colored Sepals
fused petals
more than 20 petals/rays
Tepals

Hydrangea: Flower Shape

Bell
Cross
Crown
Cup
Dome
Funnel
Irregular
Lipped
Radial
Saucer
Star
Trumpet
Tubular
Urn
Wheel

Hydrangea: Flower Size

1-3 inches
3-6 inches
< 1 inch
> 6 inches

Hydrangea Leaves

Hydrangea: Leaf Description

Leaves are opposite, simple, stalked, pinnate venation, 4"-8" in long, toothed and sometimes lobed.

Hydrangea: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Hydrangea: Leaf Color

spa
Green

Hydrangea: Deciduous Leaf Fall Color

spa
Insignificant

Hydrangea: Leaf Type

Compound (Pinnately , Bipinnately, Palmately)
Fronds
Needles
Sheath
Simple

Hydrangea: Leaf Arrangement

Alternate
Opposite
Other/more complex
Rosulate
Whorled

Hydrangea: Leaf Margin

Crenate
Crenulate
Dentate
Denticulate
Doubly Crenate
Doubly Dentate
Doubly Serrate
Entire
Lobed
Serrate
Sinuate
Undulate

Hydrangea: Hairs Present

No
Yes

Hydrangea: Leaf Length

< 1 inch
1-3 inches
3-6 inches
> 6 inches

Hydrangea Bark

Hydrangea: Bark Description

Not particularly showy

Hydrangea: Bark Color

grass
Light Brown

Hydrangea Poisonous to Humans

Hydrangea: Poison Symptoms

TOXIC ONLY IF LARGE QUANTITIES EATEN. Nausea, stomach pain, vomiting, and sweating.

Hydrangea: Poison Toxic Principle

Hydrangin, a cyanogenic glycoside

Hydrangea: Poison Severity

High
Low
Medium

Hydrangea: Causes Contact Dermatitis

No
Yes

Hydrangea: Poison Part

Bark
Flowers
Fruits
Leaves
Roots
Sap/Juice
Seeds
Stems

Hydrangea Whole Plant Traits

Hydrangea: Plant Type

Annual
Bulb
Carnivorous
Edible
Epiphyte
Fern
Ground Cover
Herb
Herbaceous Perennial
Houseplant
Mushroom
Native Plant
Ornamental Grasses and Sedges
Perennial
Poisonous
Rose
Shrub
Succulent
Tree
Turfgrass
Vegetable
Vine
Water Plant
Weed
Wildflower

Hydrangea: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Hydrangea: Habit/Form

Arching
Ascending
Broad
Cascading
Climbing
Clumping
Columnar
Conical
Creeping
Dense
Erect
Horizontal
Irregular
Mounding
Multi-stemmed
Multi-trunked
Open
Oval
Prostrate
Pyramidal
Rounded
Spreading
Vase
Weeping

Hydrangea: Texture

Fine
Medium
Coarse

Hydrangea Cultural Conditions

Hydrangea: Light

Dappled Sunlight (Shade through upper canopy all day)
Deep shade (Less than 2 hours to no direct sunlight)
Full sun (6 or more hours of direct sunlight a day)
Partial Shade (Direct sunlight only part of the day, 2-6 hours)

Hydrangea: Soil pH

Acid (<6.0)
Alkaline (>8.0)
Neutral (6.0-8.0)

Hydrangea: Soil Drainage

Frequent Standing Water
Good Drainage
Moist
Occasional Flooding
Occasionally Dry
Occasionally Wet
Very Dry

Hydrangea: NC Region

Coastal
Mountains
Piedmont

Hydrangea: USDA Plant Hardiness Zone

thermostat
3a
thermostat
3b
thermostat
4a
thermostat
4b
thermostat
5a
thermostat
5b
thermostat
6a
thermostat
6b
thermostat
7a
thermostat
7b
thermostat
8a
thermostat
8b
thermostat
9a
thermostat
9b

Hydrangea: Soil Texture

Clay
High Organic Matter
Loam (Silt)
Sand
Shallow Rocky

Hydrangea Stem

Hydrangea: Stem Color

grass
Brown/Copper
grass
Gray/Silver
grass
Green
grass
Red/Burgundy

Hydrangea: Stem Is Aromatic

No
Yes

Hydrangea Landscape

Hydrangea: Landscape Theme

Asian Garden
Butterfly Garden
Children's Garden
Cottage Garden
Cutting Garden
Drought Tolerant Garden
Edible Garden
English Garden
Fairy Garden
Garden for the Blind
Native Garden
Nighttime Garden
Pollinator Garden
Rain Garden
Rock Garden
Shade Garden
Water Garden
Winter Garden

Hydrangea: Design Feature

Accent
Barrier
Border
Flowering Tree
Foundation Planting
Hedge
Mass Planting
Screen/Privacy
Security
Shade Tree
Small groups
Small Tree
Specimen
Street Tree
Understory Tree

Hydrangea: Landscape Location

Coastal
Container
Hanging Baskets
Houseplants
Lawn
Meadow
Naturalized Area
Near Septic
Patio
Pond
Pool/Hardscape
Recreational Play Area
Riparian
Rock Wall
Slope/Bank
Small Space
Vertical Spaces
Walkways
Woodland

Hydrangea: Attracts

Bats
Bees
Butterflies
Frogs
Hummingbirds
Moths
Pollinators
Predatory Insects
Reptiles
Small Mammals
Songbirds
Specialized Bees

Hydrangea: Problems

Allelopathic
Contact Dermatitis
Frequent Disease Problems
Frequent Insect Problems
Invasive Species
Malodorous
Messy
Poisonous to Humans
Problem for Cats
Problem for Children
Problem for Dogs
Problem for Horses
Short-lived
Spines/Thorns
Weak Wood
Weedy