We lived here 12 years from 1988-2000. The present owners value the unusual plants.

Albizia kalkora appears to be zone 6b
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The flowers emerge light gold then fade to dark gold in a beautiful two tone display

Albizia kalkora, purchased from Woodlanders in 1988 as a one gallon plant now about 40' high. It blooms about two weeks before julibrissin and has larger curved leaflets. It is self fertile. Down to -4°F there has been no damage. At Dayton, Maryland another specimen has grown well for 15 years in zone 6b, freezing to the ground at -16°F in 1994.

lithocarpus henryi
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15 years from a 1 gal Woodlanders plant

At Dayton 2 L. henryi stayed evergreen at -16°F. They have now  flowered for several years and Dan Turner, of Patuxent Valley Nursery, has over 50 vigorous seedlings growing. The flowers are just like chestnut blooms.

Thujopsis dolobrata
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One of my favorite dwarf conifers, unlike arborvitae it likes shade and stays green in the winter.

Prunus lusitanica at my previous abode
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Beautiful evergreen and tough, here competing successfully with a 60 foot red maple