White Lisbon is a popular variety of Bunching onion, which belongs to the Allium genus (Allium fistulosum 'White Lisbon'). White Lisbon is a variety of heirloom OP Bunching onion . Blooms appear in these approximate colours: Purple taupe and Palatinate purple. When mature, blooms are roughly 2.5 cm (that's 0.97 inches in imperial) in diameter.When ripe, fruit appear in these approximate colours: Cosmic latte. Leaves appear approximately as a Pakistan green and Ao green colour.
Vigorous and prolific producer of ample green tops and clear, silvery-white shafts. Delicious, mild flavor.
Flowers are mauve
Heat and cold resistant.White Lisbon grows as a Perennial and is a Vegetable. Being a Perennial, it tends to grow best over several years (approx 3 years and greater). White Lisbon normally grows with a erect-like habit to a mature height of 60.0 cm (that's 1.95 feet imperial). This variety tends to bloom in mid summer.
White Lisbon Bunching onion is normally fairly low maintenance and is normally quite easy to grow, as long as a level of basic care is provided throughout the year. Being aware of the basic soil, sun and water preferences will result in a happier and healthier plant.
This variety plant info is provided by the myfolia gardener's wiki. All details about White Lisbon have been kindly provided by our members.
Keep the crop weed free, and harvest carefully to allow the remaining onions more room to mature.Plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that White Lisbon is thought of as very hardy, so this plant will tend to survive through freezing conditions. Use USDA Hardiness Zone 3 - 10 as your guideline for the appropriate climate for this plant. Ensure your soil is loamy and sandy and has a ph of between 6.0 and 7.0 as Bunching onion is a weakly acidic soil to neutral soil loving plant.
Sow thinly, to reduce the amount of thinning needed.Try to aim for a seed spacing of at least 2.26 inches (5.8 cm) and sow at a depth of around 0.23 inches (0.6 cm). Soil temperature should be kept higher than 13°C / 55°F to ensure good germination.
By our calculations, you should look at sowing White Lisbon about 28 days before your last frost date.
Although this is a perennial and will spread from the roots, it’s best grown as an annual.Ensure that temperatures are mild and all chance of frost has passed before planting out, as White Lisbon is a very hardy plant.
Harvest when the onion has grow about as thick as a pencil. Use a hand fork or a trowel to loosen the blanched rootThis variety tends to be ready for harvesting by early autumn.
White lisbon bunching
Easy to grow from seed. They require some space as they will clump together. Great taste in salads & cooking. Soak the soil well before “pulling”, especially if you only need a few from a bunch.
Sprocket1980 about growing Onion - White Lisbon (Scallion bunching) 
Didn’t come to anything
WBJohn about growing Spring Onion