An heirloom in general is any old item or antique passed down from one generation to another. The term is also used in several specific contexts. Antique can stand for any of several things: An antique is an object, often furniture or any other domestic item, that is highly valued because of its age, or because it belongs to a specific time period. ...
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In addition to their long history of use, the heirloom vegetables that are routinely grown from seed are open-pollinated, meaning that they set seed "naturally," often aided by wind, rain, or pollinating insects, and can thus be renewed by sowing the seeds harvested from each generation of plants.
Besides bolstering the heirloom movement, these activities (which are often supported by historical research to discover the past uses and values of particular plants, and historical growing methods) lend vital support to the museums' work in recreating the foodways and lifeways of earlier generations.
Heirloom apple varieties are, for a variety of reasons, especially popular among the temperate zone fruits grown by home orchardists and collectors.
In gardening and agriculture, an heirloom plant is an open-pollinatedcultivar that was commonly grown long ago, but has been largely supplanted in modern times.