Please allow up to 3 working days for despatch.

Onion Bonus F1

Onion Bonus F1

Onion Bonus is an extremely uniform medium sized onion with an almost perfect round shape and medium dark skin. The sweet, mild, less pungent flesh is extremely versatile and ideal for using raw or cooked. Early maturing, showing a good tolerance to downy mildew.
 

Product Part No: 13240

Pack size: 250 Seeds

In Stock
Price: £3.05
Add to basket

When to Sow

  • Jan
  • Feb
  • Mar
  • Apr
  • May
  • Jun
  • Jul
  • Aug
  • Sep
  • Oct
  • Nov
  • Dec

Additional Details

When to Sow Onion Bonus Seeds

February to April.

Plant Out

April to May.

Harvest

August to September

Where to Sow

Early sowing can be made under glass in pots or seed trays, sow seed on the surface of seed sowing compost and lightly cover with a sprinkling or vermiculite or compost, and place at a temperature of 14°C. Outdoor sowings can be made in April, sow seed thinly in shallow drills 1.5cm (1/2in) deep, with rows spaced 30cm (12in) apart.

What to do next

Greenhouse sown seedlings can be pricked out into individual pots or modular trays. Move plants to a cold frame in April to harden off before planting outside 15-20cm (6-8in) apart. Outdoor sowings can be thinned gradually until plants are 15-20cm (6-8in) apart, then leave to mature as smaller bulbs for storing. 

Handy Tip

Lift bulbs in autumn when mature and allow to dry before storing in a cool place for winter use.

Related products

Picture of Onion Paris Silverskin

Onion Paris Silverskin

Paris Silverskin onions are easy to grow and have a dual purpose. If you like a good size bulb on "spring" onions pull them young or leave to mature and crop as small onions for pickling.
Product Code: 13216
Pack: 500 Seeds In Stock
£1.65
Add to basket
Picture of Onion Red Brunswick

Onion Red Brunswick

Red Brunswick onion seeds. These are late maturing semi flat bulbs of dark red. They are overall, medium to large in size with excellent mild but pungent flavour.They are very decorative when sliced across the bulb to reveal which and red rings,so are ideal fresh in salads or cooked with pasta.
Product Code: 13223
Pack: 275 Seeds In Stock
£1.70
Add to basket
Picture of Onion Red Baron (RHS Award of Garden Merit)

Onion Red Baron (RHS Award of Garden Merit)

Onion Red Baron is a beautiful deep blood red coloured onion with slightly flattened globe shaped bulbs that will keep into the new year. It has late maincrop maturity with good skin and thin necks.
Product Code: 13227
Pack: 250 Seeds In Stock
£2.05
Add to basket
Picture of Onion Armstrong F1

Onion Armstrong F1

Armstrong F1 is a very productuive maincrop. It is a Rijnsburger type with beautiful coloured strong skin and has an excellent long keeping quality.
Product Code: 13231
Pack: 110 Seeds In Stock
£2.50
Add to basket
Picture of Onion Santero F1

Onion Santero F1

Santero F1 seeds produce onions that are one of the first varieties to be resistant to Downy mildew. These have a globe to slightly flat shape with copper/golden skin. It has main crop maturity with good yields and stores well.
 
Product Code: 13232
Pack: 200 Seeds In Stock
£2.65
Add to basket
Picture of Onion Globo

Onion Globo

EXHIBITION. Traditionally sown on boxing day for exhibitions.
Product Code: 13233
Pack: 250 Seeds In Stock
£2.65
Add to basket
Picture of Onion Lilia (salad)

Onion Lilia (salad)

Lilia onions seeds produce salad / pickling onions with a beautiful shiny intense red inner core.
Product Code: 13234
Pack: 500 Seeds In Stock
£2.15
Add to basket
Picture of Onion Fasto F1

Onion Fasto F1

Onion Fasto F1 Seeds - EXHIBITION VARIETY
Product Code: 13237
Pack: 250 Seeds In Stock
£2.45
Add to basket
Picture of Onion Magnate F1

Onion Magnate F1

Onion Magnate F1 Seeds
Product Code: 13238
Pack: 250 Seeds In Stock
£2.15
Add to basket
Picture of Onion White Star F1

Onion White Star F1

Onion White Star F1 Seeds
Product Code: 13242
Pack: 500 Seeds In Stock
£2.15
Add to basket
Picture of Onion Tough Ball F1

Onion Tough Ball F1

Product Code: 13243
Pack: 200 Seeds In Stock
£1.95
Add to basket
Picture of Onion Walla Walla

Onion Walla Walla

NEW TO KINGS!
Product Code: 13244
Pack: 200 Seeds In Stock
£2.50
Add to basket
Picture of SALE - Spring Onion Slender Star

SALE - Spring Onion Slender Star

Spring Onion Slender Star seeds
Product Code: 13239
Pack: 500 Seeds In Stock
£1.45
Add to basket
Picture of Onion North Holland Blood Red

Onion North Holland Blood Red

North Holland Blood Red onions have rich crimson outer skins and round generous bulbs. They can be eaten raw or roasted but are also versatile enough that they can be picked early as a salad onion. They make an excellent companion plant with carrots to help deter carrot fly.
Product Code: 13230
Pack: 250 Seeds In Stock
£1.65
Add to basket
Picture of Onion Rijnsburger

Onion Rijnsburger

STAR BUY.  Rijnsburger is an excellent Dutch variety producing large, uniform globular bulbs.
Product Code: 13207
Pack: 400 Seeds In Stock
£1.65
Add to basket
Picture of Spring Onion White Lisbon - Grower Pack (RHS Award of Garden Merit)

Spring Onion White Lisbon - Grower Pack (RHS Award of Garden Merit)

Large growers pack of white lisbon spring onion seeds. The traditional "spring" onion. White Lisbon boast long white stems with bright green tops which are slow to form a bulb, containing a mild flavour.
Product Code: 13218
Pack: 4000 Seeds In Stock
£5.00
Add to basket
Picture of Spring Onion Welsh Red

Spring Onion Welsh Red

A spring onion native of Siberia, not Wales.This is the red form nearer to the true wild Welsh Onion than the white bulbed form.
Product Code: V250
Pack: 200 Seeds In Stock
£2.35
Add to basket
Picture of Spring Onion White Lisbon Winter Hardy

Spring Onion White Lisbon Winter Hardy

Same variety as White Lisbon spring onions, but has been selected specifically for its winter hardiness making it suitable only for autumn sowing for a spring harvest.

 

Product Code: 13219
Pack: 600 Seeds In Stock
£1.65
Add to basket
Picture of Onion Rossa Longa Di Firenze

Onion Rossa Longa Di Firenze

Onion Rossa Longa di Firenze Seeds
Product Code: 13224
Pack: 250 Seeds In Stock
£2.00
Add to basket
Picture of Spring Onion Gerda

Spring Onion Gerda

Gerda Spring Onion Seeds
Product Code: 13241
Pack: 500 Seeds In Stock
£2.00
Add to basket
Picture of Onion Mammoth Improved

Onion Mammoth Improved

EXHIBITION. Mammoth Improved is the perfect exhibition onion because it can be grown to over 2.5kg in weight, and has a lovely uniform shape to the bulb.
Product Code: 18105
Pack: 100 Seeds In Stock
£3.20
Add to basket
Picture of Onion Ailsa Craig

Onion Ailsa Craig

Ailsa Craig produces large globe shaped bulbs with a mild flavour beneath golden straw coloured skin. This variety makes for a good exhibition onion but does not store for long periods and should be used in early winter.
Product Code: 13201
Pack: 400 Seeds In Stock
£1.70
Add to basket
Picture of Onion Senshyu Yellow

Onion Senshyu Yellow

Senshyu Yellow is an ever popular over-wintering Japanese onion. They are a heavy yielding variety for August sowing and June harvesting. It produces excellent quality semi-globe shaped bulbs with golden skin and white flesh.
Product Code: 13213
Pack: 150 Seeds In Stock
£1.90
Add to basket
Picture of Spring Onion White Lisbon (RHS Award of Garden Merit)

Spring Onion White Lisbon (RHS Award of Garden Merit)

White Lisbon Spring Onion Seeds
Product Code: 13217
Pack: 800 Seeds In Stock
£1.70
Add to basket
Picture of Onion Tosca

Onion Tosca

Onion Tosca produces a torpedo shaped onion with yellow to brown skins. This particular variety has excellent flavour and is suitable for winter storage.
Product Code: 13235
Pack: 250 Seeds In Stock
£1.75
Add to basket
Picture of Onion Mammoth Red

Onion Mammoth Red

EXHIBITION. The Mammoth Red onion is the largest red onion in cultivation, making it ideal for use as an exhibition onion.
Product Code: 18168
Pack: 100 Seeds In Stock
£3.20
Add to basket
Picture of Onion Long White Ishikura

Onion Long White Ishikura

Long White Ishikura Spring Onion Seeds - A Japanese bunching type of onion. RHS Award
Product Code: 85017
Pack: 300 Seeds In Stock
£1.75
Add to basket

People Also Bought

Picture of Beetroot Boltardy

Beetroot Boltardy

Beetroot Seeds - Boltardy - GARDENER'S CHOICE
Product Code: 10502
Pack: 275 Seeds In Stock
£1.05
Add to basket
Picture of Parsnip Gladiator F1 (RHS Award of Garden Merit)

Parsnip Gladiator F1 (RHS Award of Garden Merit)

EXHIBITION. Gladiator F1 seeds produce a slightly larger than standard type parsnips. More refined shape of hybrid quality.
Product Code: 13412
Pack: 500 Seeds In Stock
£2.15
Add to basket
Picture of Winter Squash Butternut Hunter F1 (RHS Award of Garden Merit)

Winter Squash Butternut Hunter F1 (RHS Award of Garden Merit)

Winter Squash Butternut Hunter F1. British bred for superior garden performance.
Product Code: 12352
Pack: Seeds 15 In Stock
£2.15
Add to basket
Picture of Sweet Corn Swift F1 SH2

Sweet Corn Swift F1 SH2

Swift is a first early sweet corn with a very sweet flavour
Product Code: 14718
Pack: 50 Seeds In Stock
£2.65
Add to basket