Juglans nigra
Zwarte walnoot / Black walnut
Juglandaceae (Okkernootfamilie)
Edible plant part (3)
Nuts,
sap,
none
Read 'form of consumption' for safe preparation methods
Toxic plant part (1)
None
Black walnut belongs to the small trees-large shrubs in the food forest. In the process of ecological succession it is a late species. The growth rate is fast. Fully grown the plant has an average height of 10 to 20 meter. and a width of 6 to 12 meter.
The foliage (or leaf cover) is half-open. The Black walnut is decidious. It buds in april and it loses its leaves in november.
This species forms a taproot shallow root system. This species is slightly spreading in the food forest. Black walnut is no nitrogen fixer.
foto: Phillip Merritt, https://www.flickr.com/photos/phillipmerritt/190074695/
foto: Phillip Merritt, https://www.flickr.com/photos/phillipmerritt/190074695/
foto: Plant Image Library, https://www.flickr.com/photos/138014579@N08/33321576024
Growth factors
- Frost (whole plant)
-
very strong frost
cold frost
mild frost
light frost
no frost
- Frost (flowers)
-
very strong frost
cold frost
mild frost
light frost
no frost
- Light
-
full sun
light shade
half shade
fairly deep shade
deep shade
- Wind
-
strong sea wind
strong wind
some wind
sheltered
very sheltered
- Soil texture
-
sand
loam
light clay
heavy clay
peat
- Soil moisture
-
inundation
wet
moist
dry
drought
- Groundwater level
-
very low
low
medium
high
very high
- Soil acidity
-
very acid
acid
neutral
alkaline
very alkaline
- Soil fertility
-
very rich
rich
average
poor
very poor
Flowering and pollination
- Flowering period (peak)
- end of march, early june
- Flowering period (length)
- several weeks, week
- Pollination vector
- wind
- Plant reproductive fertility
- partially self-fertile, self sterile
- Maximum distance for cross pollination
- 50 - 100 metre
Life Span and Plant Health
Disease susceptibility
resistantMain serious pests and diseases
squirrels, crow speciesHarvest and Consumption
Nuts
Sap
None
- Harvest location edible part
- Ground layer
- Harvesting period - start
- Early october
- Harvesting period - length
- Month, several weeks
- Harvesting period - recognition
- Easy, dropping
- Harvesting period - uniformity
- Medium
- Suitable harvesting methods
- Hand, mechanical, simple tool
- Ease of removal - edible parts
- Difficult
- Vulnerability to damage during harvesting (edible parts)
- Very resistant
- Form of consumption
- Fresh, processed
- Natural storability
- Several months
- Nutritional value - relatively high
- Fat
- Suitable markets
- Niche
- Productive life span - start (year) - minimum
- 4
- Productive life span - start (year) - minimum
- 12
- Productive life span - start (year) - minimum
- 10
- Productive life span - start (year) - maximum
- 5
- Productive life span - start (year) - maximum
- 15
- Productive life span - peak (year) - minimum
- 50
- Productive life span - peak (year) - minimum
- 25
- Productive life span - peak (year) - maximum
- 60
- Productive life span - peak (year) - maximum
- 200
- Productive life span - end (year) - maximum
- 105
- Productive life span - end (year) - maximum
- 250
- Productivity - start (kg) - maximum
- 8
- Productivity - peak (kg) - maximum
- 100
- Harvesting period - recognition
- Easy, dropping
- Ease of removal - edible parts
- Difficult
- Form of consumption
- Fresh
- Natural storability
- Several weeks
- Nutritional value - relatively high
- Vitamins
- Productive life span - start (year) - minimum
- 6
- Productive life span - start (year) - maximum
- 8
- Form of consumption
- Processed
- Natural storability
- Year
- Nutritional value - relatively high
- Protein