Don't let the walnuts seed and take root however, they are the very devil to hoik out with long tap roots that grow very quickly.
I've already got one, I let it grow to 6ft before chopping it, but its root is under the concrete of the fence post between me and next door, so impossible to remove. I'm going to have to black bag it. If only I had an 8 acre garden..
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If only I had an 8 acre garden..