Thompson & Morgan

Important delivery notice
The products on this site are only delivered to UK addresses. If you require delivery to another country please visit one of our other sites below.

Rollover image for an enlarged view

Onion 'Summer Isle' (Bunching Onion)

Allium fistulosum, Oriental Bunching Onion, Spring Onion, Scallion

Hardy Perennial

This superb RHS AGM Oriental bunching onion has been bred for its sweet and mild flavour. Use this non-bulbing, perennial onion as a spring onion to add to salads or chopped as a chive-like garnish with a mild flavour. Winter hardy Onion 'Summer Isle' can be harvested virtually year round from successional sowings. Height: 30cm (12”). Spread: 23cm (9”).


Companion planting: Try growing onions with mint to confuse and deter onion fly.


Companion planting: Try growing onions with mint to confuse and deter onion fly.


Useful links:

Companion PlantingHow to grow Onions


Culinary note: Some parts of these flowers are edible. For more details about edible flowers click here.

Ideal For:
patio, kitchen garden
Sowing Months:
March, April, May, June, July
Position:
full sun
    • 1 packet (500 onion seeds)

    •  
    • Despatch: Within 3 days
    • £2.19

Direct sow onions outdoors in spring on any firm, well drained soil in full sun. Sow thinly at a depth of 1cm (½") and a distance of 30cm (12") between rows. Prepare the planting area several weeks in advance by incorporating some well rotted garden compost to improve drainage and soil fertility. Avoid planting onions on freshly manured soil. On particularly wet ground, try growing onions in raised beds. When large enough to handle, thin welsh onion seedlings to 23cm (9") apart for medium sized bulbs, or at a slightly wider spacing if larger bulbs are required.

Alternatively sow onion seed indoors in module trays at a depth of 1cm (½"), using free-draining, seed sowing compost. Place in a propagator or seal container inside a plastic bag at a temperature of 10-15C (50-59F) until after germination which usually takes 10-14 days. Once germinated, grow onions on in cool conditions until all risk of frost has passed and they are large enough to plant outdoors at a distance of 23cm (9") apart. Cover with a protective netting or fleece to prevent attack from birds and insects. Water the plants thoroughly after planting.

Welsh onions are undemanding and require only occasional watering during particularly dry periods. However, rows should be weeded regularly. Harvest individual leaves as and when required or pull up part of the clump for the small leek-like stems. Welsh onions should be used immediately as they do not store well once harvested.

Seeds and garden supplies will normally be delivered within the time period stated against each product as detailed above. Plants, bulbs, corms, tubers, shrubs, trees, potatoes etc are delivered at the appropriate time for planting and will be stated on the product page or in your order acknowledgement page and email.


Orders for packets of seed incur a P&P charge of £1.95.
Orders which include any other products will incur a P&P charge of £4.95.
Where an order includes both packets of seeds and other products a maximum P&P charge of £6.90 will apply - regardless of the number of items ordered.


Please see our Delivery / P&P page for further details and details of any surcharges that may apply to certain destinations.

Post a review
Title of review


Rating 1 2 3 4 5
Comment
You will be redirected to login/registration page to post your review.
Reviews are subjected to approval.