Life Span
Perennial
Perennial
Type
Palm or Cycad
Tree
Origin
United States, Southeastern United States
Europe, Eastern Europe, Southern Europe, Russia/Siberia, Iran, Central Asia, Southern Asia, Western Asia, India, Nepal, China
Types
Rhapidophyllum hystrix
Black walnut
Number of Varieties
1530
0
40000
👆🏻
Habitat
Cold Regions, Subtropical climates
Cold Regions, Hills, Hillside
USDA Hardiness Zone
6-104-8
0
99
👆🏻
AHS Heat Zone
12-6
7-1
Sunset Zone
H1, H2, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21
Habit
Clump-Forming
Oval or Rounded
Plant Size
Minimum Height
180.00 cm1,220.00 cm
0
3900
👆🏻
Minimum Width
180.00 cm1,220.00 cm
0
6350
👆🏻
Plant Color
Flower Color
White, Light Yellow, Lavender
Yellow green
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
Dark Red, Brown, Sienna
Green, Brown
Leaf Color in Spring
Green, Dark Green
Green, Copper
Leaf Color in Summer
Dark Green
Dark Green
Leaf Color in Fall
Dark Green
Dark Green, Yellow green
Leaf Color in Winter
Dark Green
-
Shape
Leaf Shape
Needle like
Pinnate
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall, Winter
Spring, Summer, Fall
Growing Conditions
Sunlight
Partial Sun, Partial shade, Full Shade
Full Sun
Growth Rate
Very Slow
Medium
Type of Soil
Clay, Loam, Sand
Clay, Loam, Sand
The pH of Soil
Acidic, Neutral
Acidic, Neutral
Soil Drainage
Average
Well drained
Bloom Time
Early Summer, Summer
Late Spring, Early Summer
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Wet Site, Drought, Soil Compaction
Drought, Frost
Where to Plant?
Ground
Ground
How to Plant?
Seedlings
Budding, Seedlings
Plant Maintenance
Medium
Medium
Watering Plants
Watering Requirements
Needs small amount of water
Requires watering in the growing season, Water Deeply, Water when top layer of soil becomes dry
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
Acidic, Neutral
Acidic, Neutral
Soil Type
Clay, Loam, Sand
Clay, Loam, Sand
Soil Drainage Capacity
Average
Well drained
Sun Exposure
Partial Sun, Partial shade, Full Shade
Full Sun
Pruning
Prune to control growth, Remove damaged leaves, Remove dead branches, Remove dead leaves
In Early Autumn, Prune to stimulate growth, Remove dead leaves
Fertilizers
All-Purpose Liquid Fertilizer, can go long without fertilizers
fertilize in spring, Nitrogen
Pests and Diseases
Red blotch
Anthracnose, Armillaria mellea, Blight, Caterpillars, Crown gall, Crown rot, fungus, Powdery mildew, Red blotch
Plant Tolerance
Cold climate, Frost
Drought, Frost
Flowers
Insignificant
Insignificant
Flower Petal Number
Single
-
Fruits
Showy Fruit
✔
✘
✔
✘
Edible Fruit
✔
✘
✔
✘
Fragrance
Fragrant Flower
✔
✘
✔
✘
Fragrant Fruit
✔
✘
✔
✘
Fragrant Leaf
✔
✘
✔
✘
Fragrant Bark/Stem
✔
✘
✔
✘
Showy Foliage
✔
✘
✔
✘
Showy Bark
✔
✘
✔
✘
Foliage Texture
Coarse
Coarse
Foliage Sheen
Glossy
Glossy
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Rabbits, Small mammals
-
Allergy
drowsiness, Scratches
Severe allergen
Uses
Aesthetic Uses
bank hedging, Ornamental use
-
Beauty Benefits
-
Good for skin and hair
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification, Ethnobotanic
Absorbs greenhouse gases, Absorbs huge amounts of CO2, Air purification, Amazing growth rate, Erosion control, Food for birds, Food for insects, Forms dense stands, Nesting sites for birds, Prevent Soil Erosion, Shadow Tree, Shelter for wildlife, Windbreak
Plant Benefits
Medicinal Uses
Aging, Frostbite
Anemia, Asthma, Cancer, Cough, Diarrhea, Menstrual Disorders, Urinary tract problems
Part of Plant Used
Leaves
Fruits, Seeds
Other Uses
Application in Handicrafts, Showy Purposes
Economic Purpose, Used as a dye, Used as firewood, Used As Food, Used for its medicinal properties
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Feature Plant, Foundation, Mixed Border, Tropical
Edible, Feature Plant, Shade Trees
Botanical Name
RHAPIDOPHYLLUM hystrix
JUGLANS regia
Common Name
Needle Palm, Porcupine plant
English Walnut
In Hindi
सुई ताड़
अंग्रेजी अखरोट
In German
Nadel -Palme
Englisch Walnut
In French
palmier aiguille
Anglais Noyer
In Spanish
palmera aguja
Inglés nuez
In Greek
βελόνα φοίνικα
Αγγλικά Καρυδιά
In Portuguese
palmeira agulha
Inglês Walnut
In Polish
Igła palma
orzech włoski
In Latin
acus palma
Nucis anglicus
Kingdom
Plantae
Plantae
Phylum
Magnoliophyta
Tracheophyta
Class
Magnoliopsida
Magnoliopsida
Order
Arecales
Fagales
Family
Arecaceae
Juglandaceae
Genus
Rhapidophyllum
Juglans
Clade
Angiosperms, Commelinids, Monocots
Angiosperms, Eudicots, Rosids
Tribe
Corypheae
Juglandeae
Subfamily
Coryphoideae
Juglandoideae
Number of Species
1021
1
27800
👆🏻