Apple Espalier In A Tiny Potager

Her potager is barely 3' deep, below.

 No problem planting a pair of espalier apple trees, above.  They require little space.

She offered some of her collards, above, but they were too pretty to pick.
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Garden & Be Well,   XO Tara
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I espalier a lot of things.  Tried a hydrangea espalier?  Lushness without effort, sasanqua's too.  Sometimes, I espalier, truly due to tight space.