Assertion: damson's fruit | /r/CapableOf | ripen in autumn
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text: The fruit, called a "sloe", is a drupe 10–12 millimetres (3⁄ 8 –1⁄ 2 in) in diameter, black with a purple-blue waxy bloom, ripening in autumn and harvested – traditionally, at least in the UK – in October or November after the first frosts.