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How to Grow a Black Walnut Tree

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How to Grow a Black Walnut Tree

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Black walnuts image by MONGO http://en.wikipedia.org/wiki/File:Black_Walnut_nut_and_leave_detail.JPG

Overview

Black walnut trees are native to North America. They are a prized tree, not only for their nuts, but also for their strong wood and long life span. They grow naturally in the Eastern United States but can be grown throughout the Midwest and up through Canada. They are hardy to USDA zones four through nine and many varieties are available for planting in a home garden. However, if you want your black walnut tree to bear nuts, plant two or more trees of different varieties so they may cross pollinate.

Step 1

Choose a spot to plant your black walnut trees. Black walnuts grow best in full sun with little to no surrounding plants for competition. The PH of the soil can be between five and seven. Black walnuts grow best in thick, well-drained soil.

Step 2

Dig a hole for your tree about three or four feet deep and four feet in diameter. Place the tree in the hole, cover it with soil and add mulch. Space each tree about fifty to seventy five feet from each other to allow ample growing room.

Step 3

Water your black walnut tree once a week in the spring and summer for ten minutes each watering. Water only once every month in the fall and winter for ten minutes each watering.

Step 4

Add one cup of 10-10-10 fertilizer to the base of the black walnut tree early each spring starting the year after the tree is planted. Water after applying the fertilizer.

Step 5

Prune your black walnut tree at three years of age and every year after that in the spring. Prune all but the strongest leader. Cut back any broken or dead branches and any branches that are overreaching or growing vertically. Allow a space of about seven inches between each branch. Cut off any low-lying branches. There should be enough room for people to walk under the tree.

Step 6

Harvest your black walnuts after they fall off of the tree, usually in late summer and early fall. A black walnut tree takes ten years to produce nuts.

Tips and Warnings

  • Do not allow any plants to grow in a 50-foot diameter of your black walnut tree. They put off a poison called juglone that will kill other plants.

Things You'll Need

  • Deep, well-drained soil
  • Full sun

References

  • Growing and Processing Black Walnuts
  • Growing Black Walnuts

Who Can Help

  • Black Walnut Varieties
Keywords: growing black walnuts, how to grow a black walnut tree, grow black walnut trees

About this Author

Hollan Johnson is a freelance writer and contributing editor for many online publications. She has been writing professionally since 2008 and her interests are travel, gardening, sewing and Mac computers. Prior to freelance writing, Johnson taught English in Japan. She has a Bachelor of Arts in linguistics from the University of Las Vegas, Nevada.

Photo by: MONGO http://en.wikipedia.org/wiki/File:Black_Walnut_nut_and_leave_detail.JPG