nan, dwarf rootstock does not anchor well. clay will make for a poorly rooted and anchored tree. we actually are growing ours on a trellis wire to keep them from leaning. each one has a stake next to it, too. we have no clay in that area to deal with. we live on shale. My dear husband couldn't have a real pond if his life depended on it (and he builds ponds for other people). dwarf's are notorious for blowing over in a big storm.
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carolyn k
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