Heat Treated Onions

Heat Treated Onions

Heat-treated onion sets establish and grow quickly, rewarding you with larger bulbs and higher yields. The process reduces the risk of premature bolting and running to seeds. This totally natural process takes several months, and as soon as it's completed, we will dispatch your onion sets for immediate planting.

Shop our selection of heat-treated onion sets for sale at D.T. Brown, including a variety of different cultivars that deliver on both growth and flavour.

 

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dt-brown ONIONS/GARLIC/SHALLOTS Heat Treated Red Baron AGM Onion Setsdt-brown ONIONS/GARLIC/SHALLOTS Heat Treated Red Baron AGM Onion Sets
Save £5 on any 3 packs of onions, shallots and garlic
Heat Treated Red Baron AGM Onion Sets
250g pack Code: 42636
Sale price £6.25
dt-brown ONIONS/GARLIC/SHALLOTS Heat Treated Onion Set Collection
You’re Saving £2.80 With This Collection
Heat Treated Onion Set Collection
500g, 250g of each variety Code: 41874
Sale price £9.70
dt-brown ONIONS/GARLIC/SHALLOTS Heat Treated Cupido Onion Setsdt-brown ONIONS/GARLIC/SHALLOTS Heat Treated Cupido Onion Sets
Save £5 on any 3 packs of onions, shallots and garlic
Heat Treated Cupido Onion Sets
250g Pack Code: 54035
Sale price £6.25
dt-brown ONIONS/GARLIC/SHALLOTS Heat Treated Rosanna Onion Sets
Save £5 on any 3 packs of onions, shallots and garlic
Heat Treated Rosanna Onion Sets
250g pack (approx 80 sets) Code: 53098
Sale price £6.25
Heat Treated Onions Heat Treated Onions

Why Are Onions Treated?

The heat-treating process for onions is carried out for a variety of reasons, as it comes with the benefits of fast establishment and growth, higher yields, and the reduced likelihood of premature bolting.

As onion bulbs grow, there is a chance that they will produce flower stalks. This is undesirable for growing onion sets for consumption, as they will produce a lower yield as a result of focusing more energy towards their bulb growth. This also affects the storage life of onions.

To prevent this, heat-treated onion sets are gradually heated over the course of 30 to 60 days, which kills the flower embryo within the onion set. As a result, they are significantly less likely to flower and are perfect for straightforward, dependable growing.

To find out more about what heat-treated onions are and their many benefits, our blog contains further detail on why they’re so convenient. For in-depth guidance, our guide on how to grow onion sets provides advice from planting to harvesting and successful growing.

Order Your Heat-Treated Onion Sets for Sale Today

At D.T. Brown, we have been selling allium sets, vegetable plants and vegetable seeds to UK home gardeners for over a century. From shallot bulbs to garlic bulbs, all of our allium sets are specially chosen for their quality and come with a 100% satisfaction guarantee.

Order reliable heat-treated onion sets for sale from D.T. Brown. Discover our selections that offer unrivalled performance.

We aim to dispatch all UK seed orders within 3-5 working days, and anything else within 5-7 working days. Live products will be dispatched at their optimum time for planting.