Life Span
Perennial
Perennial
Type
Tree
Tender Perennial
Origin
Central Asia, India, Nepal
Central America
Types
White oak, Bluff oak, Muller oak
Gunnera manicata
Number of Varieties
60025
0
40000
👆🏻
Habitat
Clay soil areas, Dry areas, Sandy areas
Wet forest, Woodland Garden
USDA Hardiness Zone
6-99-12
0
99
👆🏻
AHS Heat Zone
7-5
7-1
Sunset Zone
H1, 7, 8, 9, 14, 15, 16, 17, 20, 21, 22, 23, 24
H1, 14, 15, 16, 17, 20, 21, 22, 23, 24
Habit
Oval or Rounded
Clump-Forming
Plant Size
Minimum Height
2,286.00 cm120.00 cm
0
3900
👆🏻
Minimum Width
1,219.20 cm180.00 cm
0
6350
👆🏻
Plant Color
Flower Color
Red, Yellow green
Dark Red, Dark Salmon, Sienna
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
Sandy Brown, Sienna
-
Leaf Color in Spring
Green, Light Green, Gray
Green
Leaf Color in Summer
Green, Gray
Green
Leaf Color in Fall
Green, Dark Green, Gray
Green
Leaf Color in Winter
Dark Green, Gray
Light Green
Shape
Leaf Shape
broad, flat
Lobed
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall, Winter
Spring, Summer, Fall, Winter
Growing Conditions
Sunlight
Full Sun, Partial Sun
Partial Sun, Partial shade
Growth Rate
Medium
Medium
Type of Soil
Loam
Loam
The pH of Soil
Acidic
Acidic, Neutral
Soil Drainage
Average
Average
Bloom Time
Spring
-
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Drought
Drought
Where to Plant?
Ground
Container, Ground
How to Plant?
Seedlings, Transplanting
Seedlings
Plant Maintenance
Medium
Medium
Watering Plants
Watering Requirements
Average Water Needs
Regular watering during dry periods
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
Acidic
Acidic, Neutral
Soil Type
Loam
Loam
Soil Drainage Capacity
Average
Average
Sun Exposure
Full Sun, Partial Sun
Partial Sun, Partial shade
Pruning
Remove damaged leaves, Remove dead branches, Remove dead leaves
Remove damaged leaves, Remove dead branches, Remove dead leaves
Fertilizers
All-Purpose Liquid Fertilizer
Dilute liquid fertiliser
Pests and Diseases
Red blotch
Downy mildew, Leaf spot, Rust
Plant Tolerance
Drought
Drought
Flowers
✔
✘
✔
✘
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
Glossy
Matte
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Birds
Snails
Allergy
Pollen
allergic reaction
Uses
Aesthetic Uses
Showy Purposes
Bog Garden, Water gardening
Beauty Benefits
-
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification, Nesting sites for birds, Shadow Tree, Shelter for wildlife, Wildlife
Air purification
Plant Benefits
Medicinal Uses
Chronic fatigue, Cramps, Diarrhea, Dysentry, gallstones, Haemorrhages, Menstrual Cramps
-
Part of Plant Used
Leaves, Seeds, Wood
Stem
Other Uses
Used as firewood, used for making charcoal
Jam, Jelly, Sauces
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Feature Plant, Shade Trees
Feature Plant, Mixed Border, Tropical
Botanical Name
QUERCUS leucotrichophora
GUNNERA insignis
Common Name
Banj Oak, Blackjack Oak, Himalayan Oak
Giant Rhubarb, Poorman's Umbrella
In Hindi
Blackjack Oak Tree
Giant Rhubarb
In German
Blackjack Oak Tree
Riesen- Rhabarber
In French
Blackjack Oak Tree
Géant rhubarbe
In Spanish
Blackjack Oak Tree
Gigante ruibarbo
In Greek
Blackjack Oak Tree
Giant Ραβέντι
In Portuguese
Blackjack Carvalho
Rhubarb gigante
In Polish
Blackjack Oak Tree
Giant Rabarbar
In Latin
Blackjack quercum ligno
Giant RHEUM
Kingdom
Plantae
Plantae
Phylum
Magnoliophyta
Magnoliophyta
Class
Magnoliopsida
Magnoliopsida
Order
Fagales
Haloragales
Family
Fagaceae
Gunneraceae
Genus
Quercus
Gunnera
Clade
Angiosperms, Eudicots, Rosids
Angiosperms, Core eudicots, Eudicots
Tribe
-
-
Subfamily
-
-
Number of Species
601
1
27800
👆🏻