How to Prune tree onion?
Remove bulbils from the top of the flower stem for culinary porposes and to reduce spread around the garden. Prune back once the foliage has died down
tree onion · Pruning
tree onion · Allium × proliferum
Also known as: Egyptian onion
Grow in fertile, moisture retentive, but well-drained soil in full sun. Consider liming if the soil is acid, pH below 6.5. Harvest as spring onions in spring or let to gow into shallot-size onions. Prone to spreading if bulbils not removed
Watering: Regular watering spring growth, reduce irrigation autumn leaf diebackSunlight: Full sunInformation to be completed