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Home>Vegetables>Seasonal Planting>Spring Planting Vegetables

Onion 'Santero' F1 Hybrid (Spring Planting)Allium cepa

2 Options from £5.99

1 Reviews

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375g of onion sets £5.99 Out of Stock
750g of onion sets £8.99 Out of Stock
Description How to Grow More Info Delivery Reviews

Spring planting. Heat treated.

The answer to gardeners' prayers! Heat treated early main crop, Onion 'Santero' F1 Hybrid is the first onion set with resistance to downy mildew, a potentially disastrous fungal foliage disease. This 'Rijnsburger' type onion produces copper brown, oval-to-round bulbs with medium skin thickness. Yields are similar in quality and quantity to other F1 maincrop varieties currently available, and bulbs have great storage potential. Height: 45cm (18"). Spread: 15cm (6").

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

Useful links:

Companion Planting

Pack size info: 375g equates to approximately 75 onion sets.

Kitchen Garden


Full sun

45cm (17.7in)

15cm (5.9in)

375g Of Onion Sets (T46535)
750g Of Onion Sets (T46555C)

Flowering Months Harvest Months
Onions 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.

Plant onions 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 onions in raised beds.

When growing onions from sets, plant the bulbs so that the tip of bulb is just protruding through the soil surface. Onion plants should be grown on to at least 15cm (6") tall before being gradually acclimatised to outdoor conditions prior to planting outdoors. Leave a space of 10cm (4") between each onion, and 30cm (12") between each row. Cover with a protective netting or fleece to prevent attack from birds and insects. Water the onion plants thoroughly after planting.


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 delivery charge of £1.95.

Orders which include any other products will incur a delivery charge of £4.95.

Where an order includes both packets of seeds and other products, a maximum delivery charge of £6.90 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 details of any surcharges that may apply to certain destinations.

Satisfaction Guaranteed

For your complete peace of mind, our Home and Garden products may be returned to us within 30 days of purchase for a refund of the purchase price. Items must be returned unused, at your cost and in mint condition. All items carry a manufacturer's 12 month defects warranty.


Santero Onions - Blight Free 2014-03-09

This is the third season I have grown Santero on my allotment. They have always produced very good onions of reasonable size and quality. However, this year I was delighted to be the only plot holder to have any onions in the ground in July/August due to particularly bad downy mildew. Fortunately all my fellow "allotmenteers" managed to crop their onion but they were smaller and may not store so well. Next year, all 21 plot holders have decided to purchase Santero to ensure a good quality crop. Thanks T&M for making my plot the talk of the site!

T&M replied on 2014-09-03: Thank you for your review. I hope we can continue to be of service.