Skip to product information
1 of 2

True Root Nursery

Black Walnut Seedling

Black Walnut Seedling

Species: Juglans nigra

History: Native to much of the eastern and central United States and southern Ontario, Black Walnut has long been used as a source of food, dye, lovely dark wood, and as an ornamental tree. Although it is said to have a better flavour than the English walnut, the Black walnut remains less popular due to the increased difficulty of harvesting the nut meat from within the husk. Black walnut is also infamous for being allelopathic, meaning it secretes toxic chemicals (juglones) into the soil to reduce plant competition. 

Why We Grow It: Black walnut is a beautiful tree that produces nuts with a stronger flavour than that of English walnuts. The sap can be boiled to make walnut syrup, which tastes very similar to maple syrup but with notes of caramel and butterscotch. Also, the husks can be used in brewing beer

Be mindful of the juglones in the in the roots/nut husks, they are toxic to many other species. They require a buffer of about 50'/30m from the edge of the trees canopy for juglone-sensitive plants. This article from The Garden Hoe has a helpful list of plants that tolerate juglones. However there are recent (2019) studies showing healthy soil high in organic matter and mycorrhizal fungi actually reduce the toxicity of juglones suggesting many plants can grow below juglans species in a healthy ecosystem - it will be interesting to see more study done in this area! 

Fruit Specs

Recommended Use: Nuts used for fresh eating, cooking or baking, or syrup enjoyed as you would maple syrup, husks can be used in brewing beer

Fruit Size:

Storage: Nuts keep up to three months in the fridge, syrup can be stored for about a year in the pantry

Harvest: March for syrup, October for nuts

Growing Specs

Canadian Hardiness Zone: 4

Soil Preference: Prefers loam but adaptable to different soil types

Flowering Time:

Bloom Colour:

Pollination Requirements: Self-pollinating, this tree will produce nuts without a different Black Walnut tree present but will produce more and better nuts if one is present

Sun/Shade Requirements:

Full sun (approx. 8-10 hours of sun daily)

General Growth Habits:

Tree reaches 30-40m tall, tends to grow tall and straight when shaded by other trees and short and wide when not shaded. Susceptible to European canker and have numerous insect pests.

Shipping vs. Pick Up

CLICK HERE to see how shipping compares to pick up.

Shipping: Every year we ship thousands of trees across Canada (except BC due to CFIA regulations). We carefully bag roots in damp sawdust, then box them and send them out via courrier. CLICK HERE to see our shipping policy.

Pick-up: We also have thousands of trees picked up from our nursery each year. The pick-up options is free, though you must wait until you have been emailed a confirmation that your order is ready to pick up, which will have further information such as hours, locations, etc. We really appreciate if you can make an appointment to pick up, then we can be as organized as possible during our busy season.

Size at Purchase

Our ungrafted fruit tree seedlings, nut tree seedlings, berries, and other miscellaneous plants are categorized into the following sizes excluding the roots:

  • 5-15cm
  • 15cm+
  • 30cm+
  • 60cm+
  • 90cm+

All of these heights exclude the roots since seedlings and some berries will often have a lot of root growth but relatively little vegetative growth (ex. our Shagbark Hickories seedlings are often 5-15cm above the soil but will have roots that reach 20cm+ in length).

Not all of our berries and seedlings will be available in all of these grades since growth rate can vary significantly across species and even varieties. While we remain competitive in our plant size, it's also worth noting we don't use synthetic chemicals to push vegetative growth, therefore you may find conventional nursery stock larger in some instances comparatively. 

Why plant small? It's best to transplant when a plant is young so it can establish its roots before it has a lot of vegetative growth. This is much less stressful on it and bareroot plants tend to catch up and even surpass larger potted ones planted at the same time, after a few years.

Orders that are cancelled last minute due to size (being "too small"), will still incur the applicable cancellation fees if the plants are true to our grading standards as per the agreement of sale when the order was placed.

Regular price $6.00 CAD
Regular price Sale price $6.00 CAD
Sale Sold out
Shipping calculated at checkout.
View full details