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Bunching onion      

Allium fistulosum

Bunching onion is part of the Allium genus. Its scientific name is Allium fistulosum.

Spring onions, do not form a large bulb on the stem and look similar to a small leek. Harvest when the onion looks big enough to eat and before it starts to go to seed.
Spring onions have bright green hollow leaves and the stem underground blanches to white or very light green.

Blooms appear in these approximate colours:   French lilac and   Purple taupe and   Pansy purple. When mature, blooms are roughly 2.0 cm (that's 0.78 inches in imperial) in diameter.The mature flowers are of a pompon form. Leaves appear approximately as a   Ao green and   Tea green colour. It is a flowering edible vegetable / herb that typically grows as an annual, which is defined as a plant that matures and completes its lifecycle over the course of a single year. Bunching onion normally grows with a forb habit to a mature height of 60.0 cm (that's 1.95 feet imperial). This plant tends to bloom in mid summer. White Lisbon, Evergreen Bunching, Green, Evergreen Long White Bunching and Tokyo Long White-Bunching are some of the most popular varieties of Bunching onion for home gardeners to grow.

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 plant info is provided by the myfolia gardener's wiki. All details about Bunching onion have been kindly provided by our members.

How to grow Bunching onion

  • Partial Sun

    OR +
  • Full Sun

  • Medium

Harvest the bunches when they reach spring onion size.
If left too long they will run to seed and will not be nice to eat

Try to plant in a location that enjoys partial sun / full sun and remember to water moderately. Use Zone 3 - Zone 10 as your guideline for the appropriate climate for this plant. Bunching onion needs a loamy and sandy soil with a ph of 6.0 to 7.0 (weakly acidic soil - neutral soil). Keep in mind when planting that Bunching onion is thought of as very hardy, so this plant will survive though longer winters with little or no damage.

See our list of companion Plants for Bunching onion to see which plants you should plant in close proximity to encourage growth.

Growing Bunching onion from seed

Seeds need a frost in order to germinate.
Direct sow outdoors in fall before last frost, sow indoors during winter in a greenhouse or coldframe, or sow outdoors before the last frost.
Or sow in early spring. Sow thinly and mark the row as they take a few weeks to germinate

Look to ensure a distance 0.86 inches (2.2 cm) between seeds when sowing - bury at a depth of at least 0.23 inches (0.6 cm) deep. Soil temperature should be kept higher than 13°C / 55°F to ensure good germination.

By our calculations*, you should look at sowing Bunching onion about 28 days before your last frost date .

Transplanting Bunching onion

If module planted – transplant one module (should be 4 – 5 baby plants) every 9 cm or so.
If sown direct, thin carefully, using the thinning even though they may be tiny. Allow the individual plants room to grow

Make successive sowings every 4-6 weeks.

Ensure that temperatures are mild and all chance of frost has passed before planting out, as Bunching onion is a very hardy plant.

Harvesting Bunching onion

8-12 weeks from planting, when young and tender.
Harvest as required, best used fresh

Seed Saving Bunching onion

Seed viability is one year.

Common Bunching onion problems

These problems, diseases and pests are known to affect Bunching onion plants:

Purple blotch (Alternaria porri), which causes characteristic concentric spots on the leaves, and downy mildew (Peronospora destructor) may cause severe problems. White rot (Sclerotium cepivorum) may cause serious losses under successive or repeated cropping. 1

Onion thrips, spider mite, leaf miner, beet army worm (Spodoptera exigua) and the American bollworm (Heliothis armigera). 1

Other names for Bunching onion

Onion, Shallot, ScallionWelsh onion, Japanese bunching onion, Spring onion, sibuyas

A. fistulosum

Misspellings: Spring onions, Allium fitulosum, Allium fistulum

Latest Bunching onion Reviews

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Bunching onion care instructions

How long does Bunching onion take to grow?

These estimates for how long Bunching onion takes to sprout, grow and harvest are from real observations from real gardeners, right around the world. Start logging and journaling your observations to participate!

When should I plant Bunching onion?

Our when to plant Bunching onion estimates are relative to your last frost date. Enter your frost dates and we'll calculate your sowing and planting dates for you!


1 Oyen, L.P.A. & Messiaen, C.-M., 2004. Allium fistulosum L. [Internet] Record from Protabase. Grubben, G.J.H. & Denton, O.A. (Editors). PROTA (Plant Resources of Tropical Africa / Ressources végétales de l’Afrique tropicale), Wageningen, Netherlands. < http://database.prota.org/search.htm>.

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