Life Span
Perennial
Perennial
Type
Tree
Perennial
Origin
United States, California
Eastern Asia, India, Nepal, China
Types
-
Victoria Rhubarb
Colorado Red Rhubarb
Turkish Rhubarb
Number of Varieties
8100
0
40000
👆🏻
Habitat
Woodland Garden Canopy
gardens, Grassland, Humid climates, Tropical regions, Urban areas
USDA Hardiness Zone
6-93-7
0
99
👆🏻
AHS Heat Zone
9-1
8-5
Sunset Zone
3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
2a, 2b, 3a, 3b, 4, 5, 6, 7, 14, 15, 16, 17
Habit
Spreading
Clump-Forming
Plant Size
Minimum Height
1,520.00 cm60.00 cm
0
3900
👆🏻
Minimum Width
1,370.00 cm120.00 cm
0
6350
👆🏻
Plant Color
Flower Color
Red, Yellow green
Ivory
Flower Color Modifier
Bicolor
-
Fruit Color
-
-
Leaf Color in Spring
Green, Blue Green
Green
Leaf Color in Summer
Green, Blue Green
Green
Leaf Color in Fall
Yellow, Orange, Pink
Green
Leaf Color in Winter
-
Light Green
Shape
Leaf Shape
Irregular
Compound
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall, Winter
Summer
Growing Conditions
Sunlight
Full Sun, Partial Sun
Full Sun, Partial Sun
Growth Rate
Slow
Fast
Type of Soil
-
Clay, Loam
The pH of Soil
-
Acidic, Neutral
Soil Drainage
-
Well drained
Bloom Time
Spring
Summer, Late Summer
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Drought
Drought
Where to Plant?
Ground
Ground
How to Plant?
Seedlings
Stem Planting
Plant Maintenance
Medium
Medium
Watering Plants
Watering Requirements
Average Water Needs
Do Not over Water, Requires regular watering, Use Mulches to help prevent water loss during hot and windy weather, Water Deeply
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
-
Acidic, Neutral
Soil Type
-
Clay, Loam
Soil Drainage Capacity
-
Well drained
Sun Exposure
Full Sun, Partial Sun
Full Sun, Partial Sun
Pruning
Remove damaged leaves, Remove dead branches, Remove dead leaves, Remove dead or diseased plant parts
Remove damaged leaves, Remove dead branches, Remove dead leaves
Fertilizers
All-Purpose Liquid Fertilizer
All-Purpose Liquid Fertilizer
Pests and Diseases
Red blotch
Red blotch
Plant Tolerance
Drought
Drought
Flowers
Insignificant
Showy
Flower Petal Number
-
-
Fruits
Showy Fruit
✔
✘
✔
✘
Edible Fruit
✔
✘
✔
✘
Fragrance
Fragrant Flower
✔
✘
✔
✘
Fragrant Fruit
✔
✘
✔
✘
Fragrant Leaf
✔
✘
✔
✘
Fragrant Bark/Stem
✔
✘
✔
✘
Showy Foliage
✔
✘
✔
✘
Showy Bark
✔
✘
✔
✘
Foliage Texture
Medium
Bold
Foliage Sheen
-
Matte
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Birds
-
Allergy
Pollen
Skin irritation
Uses
Aesthetic Uses
Borders
-
Beauty Benefits
-
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification, Shadow Tree, soil erosion prevension on hill slopes, Wildlife, Windbreak
Air purification
Plant Benefits
Medicinal Uses
Astringent, Diarrhea, Dysentry, Haemorrhages, Poultice, Sore Eyes, Sore throat
-
Part of Plant Used
Leaves, Seeds, Wood
Whole plant
Other Uses
Adhesive, Basketary, Buttons, Repellent, Tannin, Used as fuel, Used for woodware
Culinary use, Used as Ornamental plant
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Feature Plant, Shade Trees, Street Trees
Edible, Herb / Vegetable, Mixed Border
Botanical Name
QUERCUS douglasii
RHEUM x hybridum
Common Name
Blue Oak
Hybrid Garden Rhubarb, Rhubarb
In Hindi
Blue Oak Tree
एक प्रकार का फल
In German
Blaue Eiche
Rhabarber
In French
Bleu Oak Tree
Rhubarbe
In Spanish
Azul del árbol de roble
Ruibarbo
In Greek
Μπλε Oak Tree
Ραβέντι
In Portuguese
Carvalho azul
Ruibarbo
In Polish
Niebieski Oak Tree
Rabarbar
In Latin
Blue quercum ligno
RHEUM
Kingdom
Plantae
Plantae
Phylum
Magnoliophyta
Tracheophyta
Class
Magnoliopsida
-
Order
Fagales
Caryophyllales
Family
Fagaceae
Polygonaceae
Genus
Quercus
Rheum
Clade
Angiosperms, Eudicots, Rosids
Angiosperms, Core eudicots, Eudicots
Tribe
-
-
Subfamily
-
-
Number of Species
2060
1
27800
👆🏻