Answer: Based on your zip code you are gardening in zone 6B or the warmer part of zone 6, so you will need to look at the hardiest of lavenders such as Lavandula latifolia (English spike lavender), Lavandula dentata 'Goodwin Creek Gray' Lavandula x intermedia 'Provence', Lavandula dentata candicans, and for slightly smaller cultivars (under 20 inches) you might like Lavendula "Hidcote" or "Munstead". These plants require a full sun location (a minimum of six hours of direct sun) and well drained soil. In a poorly drained spot or in heavy clay soil they will not survive the winter, they also do not do well in an extremely acid soil. In your relatively cold winter climate where winter damage will need to be clipped off each spring, they will probably not reach the the top of their size range so all should be about two feet or less. Your local professional nursery staff should be able to help you evaluate your planting site to see if lavender will be likely do well for you there, or not.
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