• Photo of Grevillea (Grevilleas)

Plant Profile: Grevillea

Taxonomy: Grevillea

Names

Grevillea 'Robyn Gordon', Silky Oak, Silver Oak

  • Photo of Grevillea (Grevilleas)

Phonetic Spelling:greh-vil-LAY-ah

Genus:Grevillea

Species:

Family:Proteaceae

Grevillea are shrubs found in tropical and subtropical regions, characterized by their alternate leaves that are either deeply lobed or serrated. The flowers, which are tubular in shape, bloom in clusters at the tips of the branches and can be found in shades of white, red, yellow, or orange.

These evergreen plants thrive in warm climates and benefit from extended growing seasons. Most species are not frost-tolerant, so it's advisable to cultivate them in containers. This allows for easy relocation to a garage or shed during cold nights when temperatures drop near freezing. Additionally, they can be kept indoors as houseplants, provided they receive ample bright light.

Caution is advised when handling Grevillea, as they can cause significant skin irritation.

Grevillea Feature Summary

Grevillea Image Gallery

Tags

#evergreen
#showy flowers
#poisonous
#full sun tolerant
#fragrant flowers
#houseplant
#drought tolerant
#low maintenance
#well-drained soil
#container plants

Similar Plants

Grevillea Feature Summary

Attributes
Central Malesia to New Guinea, New Caledonia, Australia
Perennial
Woody
Flowers
Flowers are arranged in a terminal cluster, tubular shaped and may be white, red, yellow, or orange.
White
Gold/Yellow
Red/Burgundy
Orange
Spring
Summer
Fall
Winter
Leaves
deeply lobed or toothed
Green
Gray/Silver
Blue
Poisonous to Humans
Intense itching, streaking, and blisters, often delayed after contact. SKIN IRRITATION SEVERE!
Leaves
Flowers
Bark
Whole Plant Traits
Cultural Conditions
Full sun (6 or more hours of direct sunlight a day)
Good Drainage
Landscape
Container
Houseplants
Poisonous to Humans
Contact Dermatitis

Grevillea Attributes

Grevillea: Country Or Region Of Origin

Central Malesia to New Guinea, New Caledonia, Australia

Grevillea: Life Cycle

Annual
Biennial
Bulb
Perennial
Woody

Grevillea Flowers

Grevillea: Flower Description

Flowers are arranged in a terminal cluster, tubular shaped and may be white, red, yellow, or orange.

Grevillea: Flower Color

filter_vintage
Gold/Yellow
filter_vintage
Orange
filter_vintage
Red/Burgundy
filter_vintage
White

Grevillea: Flower Value To Gardener

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

Grevillea: Flower Bloom Time

Winter
Spring
Summer
Fall

Grevillea: Flower Shape

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

Grevillea Leaves

Grevillea: Leaf Description

deeply lobed or toothed

Grevillea: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Grevillea: Leaf Color

spa
Blue
spa
Gray/Silver
spa
Green

Grevillea: Leaf Arrangement

Alternate
Opposite
Other/more complex
Rosulate
Whorled

Grevillea: Hairs Present

No
Yes

Grevillea: Leaf Feel

Fleshy
Glossy
Leathery
Papery
Prickly
Rough
Rubbery
Slippery
Smooth
Soft
Velvety
Waxy

Grevillea Poisonous to Humans

Grevillea: Poison Symptoms

Intense itching, streaking, and blisters, often delayed after contact. SKIN IRRITATION SEVERE!

Grevillea: Poison Toxic Principle

Resorcinols

Grevillea: Poison Severity

High
Low
Medium

Grevillea: Causes Contact Dermatitis

No
Yes

Grevillea: Poison Part

Bark
Flowers
Fruits
Leaves
Roots
Sap/Juice
Seeds
Stems

Grevillea Whole Plant Traits

Grevillea: 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

Grevillea: Woody Plant Leaf Characteristics

Broadleaf Evergreen
Deciduous
Needled Evergreen
Semi-evergreen

Grevillea: Maintenance

Low
Medium
High

Grevillea: Texture

Fine
Medium
Coarse

Grevillea Cultural Conditions

Grevillea: 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)

Grevillea: Soil Drainage

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

Grevillea: USDA Plant Hardiness Zone

thermostat
10a
thermostat
10b
thermostat
11a
thermostat
11b
thermostat
9a
thermostat
9b

Grevillea Stem

Grevillea: Stem Is Aromatic

No
Yes

Grevillea Landscape

Grevillea: Resistance To Challenges

Black Walnut
Compaction
Deer
Diseases
Drought
Dry Soil
Erosion
Fire
Foot Traffic
Heat
Heavy Shade
Humidity
Insect Pests
Pollution
Poor Soil
Rabbits
Salt
Slugs
Squirrels
Storm damage
Urban Conditions
Voles
Wet Soil
Wind

Grevillea: 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

Grevillea: 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