How to make artificial round shrubs and topiay?

Laurie L Holmes
by Laurie L Holmes

I've got a newly built retaining wall around a tree. I can't get anytype of scrunbs to grow in it, so I want to make some round shrubs and topiay to put in it.

I want 3 of these about 18" diameter.

2 of these... Top ball being around 10" diameter...

Bottom ball being around 14" diameter.

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