||September (flowerbulb planting time)
The flowerhead of Allium nigrum, commonly known as Black garlic, isn’t black, as the name suggests, but white verging on a pale pink (it is the anthers that are black and give this plant its name).
Allium nigrum is native to southern Europe, and eastwards into Iran. Black garlic is sometimes seen naturalised in the Netherlands. The flowerhead is semispherical and measures up to 10cm across. The stem can reach a height of 80cm. Allium nigrum is suitable for dry places.