Answer: Very alkaline soils can be challenging to many plants. Those that not only survive, but thrive, include Japanese Cherry, (including Weeping Cherry), Cercis (Judas-tree), flowering crabapple, and black pine. Shrubs include Cistus, Weigela, Buddleia (Butterfly Bush), Hebe, Mugo Pine, Dictamnus (Burning Bush), and Ceratostigma (hardy Plumbago).
Grapes might not balk at the alkaline soil, and you won't know until you try. Buffalo, Niagara and Concord should do provide lots of fruit, or you might check with a local nursery to see which other varieties perform well in your climate.
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