One of the most versatile of all vegetables – onions are a staple of many diets. Complementing a wide range of different dishes and recipes – onions are one of the most popular crops found in British gardens. At Capital Gardens, we stock a comprehensive range of onions from long salad onions to traditional yellow onions – perfect for all palates and requirements.

At Capital Gardens, we have selected onion bulbs from respected and trusted growers – ensuring the highest standard of grown onions. This can help you grow bumper crop after bumper crop of healthy and delicious onions which can be plucked from the ground at maturity and served at the table.

Onion Bulbs

From Red Suns to Bedfordshire Champions – we stock a huge array of delicious and versatile onion bulbs. The La Cipolla Rossa de Toscana red onions offer a beautiful crunch and sharp, sweet taste – perfect for summer salads or winter stews. The robust and long-lasting onions can be harvested for a number of months throughout the year, and can be stored for eating throughout the autumn and winter.

The bulbs are incredibly simple to grow – perfect for first-time veg patch growers who are looking for some quick wins with minimal effort and maximum reward. Stored correctly, the onions can last for months – helping you save on your weekly grocery bills.

Salad Onion Bulbs

At Capital Gardens, we stock some more specialist onion bulbs – including a great selection of bulbs for salad onions. The North Holland Blood Red Redmate salad onion bulbs are the perfect way to add a little colour to the salad bowl. Without compromising taste – the fetching blood red colour of the onions are sure to catch the eyes of your fellow diners.

The mild flavour of the onion lends it perfectly to raw salads – ensuring that other tastes are never overpowered and lost underneath the onion tones.


    Onion Stuttgarter Giant – 50 per pack

    Very popular golden skinned, white fleshed variety. Produces slightly flatted rounded bulbs, grown for commercial use but now you can grow at home! Onion sets are easy to grow in the garden simply push each set just into the soil in rows and water in which makes them ideal for beginners. Plant them around 20cm apart to ensure they have enough space to swell and aren’t competing for water and nutrients. Be aware of birds and squirrels as they can pull them up and have them as a snack! Once mature lift and remove all soil, then leave on the ground if its warm and dry or dry them off inside.


    Onion Stur BC 20 – 50 per pack

    The onion ‘Stur BC 20’ is a late season harvesting variety with exceptional storage life. They are attractive round bulbs that have good bolting tolerance and highly productive sets.

    Plant in March until April in soil and water them well. Be sure to check that birds have not been disturbing your onions as they grow. Once they have matured dry off inside until the leaves wilt, when they have dried they can either be stored or immediately used for cooking.

    Easy to grow ‘Stur BC 20’ onion is perfect for beginners.


    Onion Snowball – 50 per pack

    Snowball is a white skinned variety with a lovely mild white flesh, this variety also stores well. As its name suggests it’s a nice rounded shape. This onion has been known to be baked whole for a juicy mild alternative to other vegetables as well as being perfect for using as the base of stocks and sauces. Plant within a border or bed that gets full sun, from March until April and your crop will be ready to harvest from July until August. Not the best at storing, but wonderful for eating fresh.



    Onion Red Baron – 50 per pack

    The ‘Red Baron’ onion is a mid to late maturing variety that produces firm and flattened round bulbs, in a wonderful deep red colour. The red rimmed flesh has a strong and distinct flavour makes a delicious addition to salads. Red Baron is a mid-late maturing variety and produces firm, flattish-round bulbs of a beautiful dark red colour. With red rimmed flesh and a strong flavour this variety makes an attractive and tasty addition to salads. An excellent cropping red onion with good storage potential. This variety was awarded the RHS Award of Garden Merit.

    Plant in a position with full sun, they make an excellent addition to a kitchen garden.

    Easy to grow, plant from mid February to March and your ‘Red Baron’ onions will be ready to harvest from August.


    Onion Karmen – 50 per pack

    The red onion ‘Karmen’ is an attractive red skinned, flattened globe onion that has white flesh with a sweet taste with rings of deep crimson throughout. Perfect within a salad or when cooking, this heavy cropping onion also stores well, which enables them to be used for long periods.

    Best planted from March to April in a position that receives full sun. Be sure to prepare your soil a few weeks before planting by adding compost or soil enricher. Give your sets enough room to mature and bulk, spacing in rows of up to 30cm apart with the neck facing upwards leaving the tops poking through the surface. Water regularly.

    These onion sets are easy to grow in the garden, which makes them ideal for beginners.


    Onion Hercules – 50 per pack

    Winner of the RHS Award of Garden  Merit the ‘Hercules’ onion produces high yields of spherical bulbs with golden skins and firm, rich flesh that is well flavoured. They have a good resistance to bolting and can keep for several months. They are a truly marvellous variety that are highly uniformed and sprout tolerant.

    They establish quickly and grows relatively quickly too- maturing 18-20 weeks from planting.

    Plant in spring and they will be ready to harvest in late summer. They are disease and pest tolerant and thrive in ordinary conditions which make them perfect for the beginner gardener.

    Plant around 20cm apart so they have space to establish without competing for nutrients. Once they have matured dry out indoors .


    Onion Centurion – 50 per pack

    The classic onion. It is strong growing and will produce an abundance of heavy yields that are early maturing. An even golden colour and uniform flattened globe shaped bulbs, together with good storing ability makes them a fantastic and easy variety to grow. It’s even won the RHS Award of Garden Merit! Perfect for beds and borders, choose a location within your garden that receives full sun. Plant from February to April and you will be able to harvest your ‘Centurion’ onions in August to September.

  • Onion Senshyu Yellow Taylors Bulbs

    ‘Senshyu Yellow’ was first introduced to the UK from Japan in the early 70’s as an alternative to the traditional spring sown varieties. One of the first Japanese overwintering varieties to be tried and tested, today it remains a growers favourites for surviving the winter weather.

    A reliable maincrop the produces heavy yields of semi-globe shaped bulbs with straw coloured skins and crisp white flesh. Growing to a height of up to 45cm and spread of 15cm, it will mature from June to July from an August sowing. Producing onions of an usable size before spring sown maincrop varieties are ready. Overwintered onions are in the ground a lot longer than their summer counterparts; roughly 300 days. They have more time to develop a vigorous root system, which means they grow more strongly on heavy soils. Developing in spring, when their soil moisture is plentiful. They mature and dry down in early summer when the days are at their longest. All these factors mean that you will be rewarded with larger onions with little amount of effort. The newer varieties of overwintering onions will easily keep well into the autumn if cured properly. You can have onions all year round with little effort!

    When planting, choose a sunny location with fertile and well drained soil that has preferably been dug and manured in the previous autumn. Do not plant or sow on a freshly manured bed. Lime if the soil is too acidic. Avoid planting in an area where the previous crop was of the onion family. Apply a general fertiliser if needed and rake the surface when the soil is reasonably dry. Tread over the area and rake again to produce a fine, even tilth. A potential problem for most overwintered alliums is the constant rainfall and saturated soil we experience most winters. It might be wise to grow in raised beds to improve the drainage. If this is not possible, cover over winter and this will result in less winter damage.

    Height: 45cm

    Spread: 15cm

    Harvest: 46 weeks after sowing

    One bag contains 50 bulbs




    This product is available at the following Garden Centres:

    • Alexandra Palace Garden Centre
    • Neals Nursery Garden Centre
    • Woods of Berkhamstead Garden Centre
  • Onion Radar Taylors Bulbs

    ‘Radar’ are a top performing onion variety that produces sets from September, ready for harvesting in May next season. This variety is a long standing favourite, chosen for its reliable cropping, bolt resistance and winter hardiness.

    This Japanese heritage onion will produce mild flavoured onions, delicious when eaten fresh or stored through to autumn. The short and wide bulbs produce rich straw coloured skins and crisp white flesh.

    Plant your onion sets in rows of any form, in a location with full sun and well drained soil. Prepare the planting area several weeks in advance by incorporating some well rotted garden compost to improve drainage and soil fertility. Avoid planting your onions on freshly manured soil. On particularly wet ground try growing your onion sets in raised beds. When growing from sets, plant the bulbs so that the tip of the bulb is just protruding through the soil surface. Leave a space of 10cm between each bulb and 30cm between each row.

    Height: 45cm

    Spread: 15cm

    Flowering: June-July

    Hardiness: Hardy

    One bag contains 50




    This product is available at the following Garden Centres:

    • Alexandra Palace Garden Centre
    • Neals Nursery Garden Centre
    • Woods of Berkhamstead Garden Centre