Stark® Black Gem® Walnut

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A Stark Bro's Exclusive!

Perfect for lovers of black walnuts. This variety produces huge crops of light-colored, high-quality, delicious nuts that crack in large segments and offer a superior nutmeat-to-shell ratio. Thin husks slip off easily, without the usual mess. Matures to be 40 to 60 feet tall. Heat-tolerant. Ripens in late September. Grafted. Self-pollinating. Juglans nigra

125% Survival Guarantee!

Since 1816, Stark Bro’s has promised to provide customers with the very best fruit trees and plants. It’s just that simple. If your trees or plants do not survive, please let us know within one year of delivery. We will issue a one-time merchandise credit to your account equaling 125% of the original product purchase price. Read more about our warranty policy.


Bloom Color Green, Yellow
Distance To Pollinator 75 - 250'
Fruit Color Brown
Fruit Size Medium
Pollination Self-Pollinating
Ripens/Harvest Late September
Shade/Sun Full Sun
Soil Composition Loamy
Soil Moisture Well Drained
Soil pH Level 6.5 - 7.0
Taste Flavorful
Texture Crunchy
Years to Bear 4 - 5
Zone Range 5 - 9

Zone Compatibility

This Variety's Zone Range 5 - 9
My Hardiness Zone ?
The USDA hardiness zones offer a guide to varieties that will grow well in certain climates. Each zone corresponds to the minimum winter temperatures experienced in a given area. Make sure that your hardiness zone lies within the zone compatability range of this variety before ordering.

Size & Spacing

Mature Size

When your tree matures, it will be approximately 40 - 60' tall x 40 - 60' wide.

Recommended Spacing

We recommend spacing these trees 40 - 60' apart to ensure room for growth.


This variety is self pollinating.

In many cases, you may still want to plant pollinating partners to increase the size of your crops, but with self-pollinating varieties doing so is optional. You'll get fruit with only one plant!

Tools & Supplies

Having the proper tools and supplies when growing your own can make the difference between a good harvest and a great harvest! Here's a list that our experts recommend for this variety.

Planting & Care

Learn all about how to grow walnut trees in The Growing Guide. An entire section of our website dedicated to your growing success.

Shipping Information

Estimated Delivery Date

This item is currently out of stock.

Arrives when it's time to plant

Your success is our priority. We work hard to make sure that your order arrives at the ideal time for planting in your location based on your local climate conditions.


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Questions & Answers

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Browse 7 questions Browse 7 questions and 9 answers
Why did you choose this?
Stark Bro's Store
Love black walnuts
Rhonda B on Apr 7, 2016
Love black walnuts
Rhonda B on Apr 7, 2016
Do these trees tolerate saline conditions? Or poor secondary (untreated lake) water that is not potable?
Bobbi B on Oct 14, 2020
how well do they stand up to a hurricane?
j f on Jan 16, 2018
BEST ANSWER: Black Walnut trees are quite hardy when they are planted in their proper zone. It takes a little bit to get the roots established. The wood of Black Walnut trees is strong but quite elastic so if you have a nice healthy established Black Walnut tree that is thriving and a hurricane comes, I think the tree will weather it nicely.
Does this tree poison the ground like a black walnut tree?
JARED S on Apr 17, 2021
BEST ANSWER: Yes. This is a black walnut and black walnuts produce a chemical called juglone that is toxic to certain plant species.
Is it possible to grow this in a large container, say 24" pot?
Feliks A on Oct 28, 2020
BEST ANSWER: You can grow almost anything in a container! This excellent article will answer your questions and provide good advice. Please see "Growing Fruit Trees in Containers" //
What size is the largest black walnut tree that you sell?
Doe-Eyes on Oct 9, 2020
BEST ANSWER: All of our nut trees are grown in the EZ start pots and ship with a range of 1.6-3 feet tall.
Do you have a black walnut tree 6 foot? Will pickup!
Joyce B on Dec 26, 2020

Customer Reviews

4.5 / 5.0
4 Reviews
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1 Star
Black Gems
I purchased this tree a year ago and it is doing great. Very happy with the time that it took to get it and the size that it was. Planted it and have had no problems. Can't wait till it is big enough to start producing.
May 10, 2017
over 5 years ago
Two years
I planted this on a hill with some big tree around it. It grows great almost 5 feet tall with nice branches and leaves.
May 15, 2017
over 5 years ago
Stark Black Gem Walnut
we received a very strong tree and after the winter it seems to be doing well.
February 23, 2016
over 5 years ago
Black Gem Walnut Tree
I purchased three of the Black Gem walnut trees. After one year two of them are doing quite well. However, one of them died unexpectedly. Not sure why two survived and one died as they all three received the same attention.?
Michael, Arkansas
May 21, 2017
over 5 years ago