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Onion Collection (Spring Heat Treated)

Allium cepa

Hardy Bulb

What is Hardy Bulb?

Minimise bolting

Including our most popular red onion

And a yellow-skinned variety for all-round kitchen use

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Description How to Grow More Info Delivery

Onion (Spring Heat Treated) Collection provides you with two reliable and vigorous onion varieties, one white and one red, to meet all of your kitchen needs.  Our heat-treated sets minimise the risk of bolting and guarantee a great onion harvest.  The collection comprises:

  • Onion 'Hysky' (Spring) - Yellow-skinned bulbs with good skin quality which means they will store for many months.
  • Onion 'Red Ray' (Spring) - An improvement on the popular ‘Red Baron’. It has deep red skins and firm, sweet flesh.

Height: 45cm (18"). Spread: 15cm (6").

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

Useful links:

Companion PlantingHow to grow Onions


Pack size info: 250g equates to approximately 75 onion sets.

Height Up to 45cm (18in)
Spread Up to 15cm (6in)

Hardy Bulb

kitchen garden

full sun

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Harvest Months


500g of onions (250g of each variety) (KC2340)

Plant onion sets in rows in any firm, well drained soil in full sun. 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 onion sets in raised beds. When growing onions from sets, plant the bulbs so that the tip of bulb is just protruding through the soil surface. Leave a space of 10cm (4") between each bulb, and 30cm (12") between each row.
Onion sets are undemanding and require only occasional watering during particularly dry periods. However, rows should be weeded regularly. Harvest onions in late June and July, a week or two after the leaves begin to turn yellow. Choose a dry day to loosen them from the ground with a fork. Leave them on the soil surface for a day or two until they have fully dried in the sun. Once dry, remove the top foliage and store them in a well ventilated, dry position. Bulbs can be stored for several months.

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 or potting on. Delivery times will be stated on the product page above, or in your order acknowledgement page and email.

Orders for packets of seed incur a delivery charge of £2.99.

Orders which include any other products will incur a delivery charge of £5.99.

Where an order includes both packets of seeds and other products, a maximum delivery charge of £6.99 will apply - regardless of the number of items ordered.

Large items may incur a higher delivery charge - this will be displayed in your shopping basket.

Please see our Delivery page for further details, and more information on different charges that may apply to certain destinations.

For more information on how we send your plants please visit our Helpful Guide on plant sizes.

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