Onion, Tree - Allium cepa Proliferum Group
Allium cepa Proliferum Group or Tree Onion is a hardy perennial that can grow up to 1.5m tall.
Typical of the allium family, thick hollow cylindrical stems are produced in the first year of growth. Small greenish white flowers appear in the second summer of growth, and these are followed by small bulbs which form at the top of the stem. The whole plant is edible.
Preferring full sun, Tree onions will grow well in most soils.