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TREE ONION GROWING INFORMATION
© Frances Michaels
BOTANICAL NAME: Allium cepa
walking onions; Egyptian onions; topset onions
Alliaceae, the onion family
Tree onions produce up to 6-10 tender, juicy, mild onions at the base of the plant; and a stiff stem with 6-8
bulbils, or little onions, at the top. A biennial, it will self-propagate by folding its stem to the ground so
that the bulbils plant themselves. It is the most cold-hardy of all the onions and survives frozen ground.
The top bulbils are used for pickling. The base bulb is a tender, juicy salad onion. Tree onions will keep for
up to 12 months.
Recommended planting time:
Plant May to December in a sunny, well-drained position.
Plant in late spring in cooler areas.
Plant tree onions 3 cm deep.
Space bulbs 15-20 cm apart.
Soil is best prepared a few months before planting. For a good
crop, tree onions require a rich, loam soil. Avoid using manure, as too high a nitrogen content will reduce the
keeping quality of the tree onions. Check the pH and add lime to correct acidity.
Harvest the tree onions when the stalks dry, gather the bulbils and plant out straight away. Spread the bulbs on
a wire screen in a cool, well-ventilated shelter to dry. Store in a cool, dry place or hang up in open weave bags.
Not to NORFOLK ISLAND, NT, SA, TAS or WA
SORRY but due to quarantine restrictions between Australian States no plants at all can be ordered
by residents of Norfolk Island
. These restrictions are very important as they prevent
the spread of plant pests and diseases. No potatoes, garlic, shallots, strawberries or tubestock
can be sent to South Australia
. No tubestock can be sent to
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