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Onion storage

Restrain empowers producers worldwide with a trusted, natural method for enhancing onion storage.

onion

Natural ethylene gas system for onion storage

By harnessing the power of ethylene, Restrain enables extended storage without chemical additives or complex atmospheres, preserving the quality and integrity of every onion. Keep your onions fresher, longer!

Key benefits of ethylene gas for onions

Blog & Updates

News
17/12/25
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Restrain appoints Agrifirm as a distributor for Accumulator in the Netherlands
Restrain®, a global leader in residue-free technologies for potato production and storage, is pleased to announce the appointment of Agrifirm as a distributor for Accumulator, the pre-planting treatment designed to optimise seed potato multiplication and salad potato production throughout the Netherlands. This partnership builds on Agrifirm’s long-standing reputation as one of the Netherlands’ leading agricultural…
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News
15/12/25
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Van Iperen BV appointed new distributor of Restrain® Accumulator in the Netherlands
Restrain®, a specialist in residue-free technology for potato production and storage, has appointed Van Iperen BV as the distributor of Restrain Accumulator in the Netherlands. Accumulator breaks apical dominance while simultaneously inhibiting sprout growth. During application there is little to no sprout growth, while apical dominance is disrupted and more sprouts develop once the treatment…
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News
01/12/25
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Restrain announces new LATAM Managing Director, Mr. Gonzalo Caldiz
Restrain is pleased to announce the appointment of Mr. Gonzalo Caldiz as the company’s new Managing Director for Latin America (LATAM), reinforcing Restrain’s strategic commitment to supporting growers and partners across the region. Gonzalo, son of the well-respected agribusiness leader Mr. Daniel Caldiz, currently serves as Managing Director of AgriCal Cono Sur S.A, Restrain’s agency…
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News
28/11/25
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Study finds no statistical difference in fry colour between DMN and Restrain’s InhibitR™ technology
Fry colour remains one of the most persistent and costly quality challenges for potato growers and processors. Factors such as temperature fluctuations, COâ‚‚ accumulation, treatment performance, and overall store management can significantly impact final product colour. As the sector continues to rely on a range of sprout-control options including oils, DMN, and ethylene, ensuring consistent…
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News
09/09/25
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Restrain Unaffected by UK Ethylene Withdrawal
Restrain, a global leader in crop storage technologies, confirms that its systems remain fully authorised and unaffected by the recent UK Health and Safety Executive (HSE) decision to withdraw certain ethylene-based plant protection products. On 5 September 2025, the HSE published a notice regarding the withdrawal of plant protection products for ethylene supplied via gas…
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News
24/07/25
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Dan Hewitt Appointed Managing Director of Restrain
We are thrilled to announce that Dan Hewitt has been appointed as our new Managing Director. He previously served as the company’s UK Country Manager and in the Restrain Leadership Team, and has stepped into the global role following a year of strategic development within Restrain’s oldest and most established market. Hewitt brings over two…
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Ready to take control with Restrain?

The process consists of maintaining certain levels of natural ethylene gas during the storage of onions.

Ethylene is a dynamic gas that distributes evenly throughout the storage.

During the process, the sensor checks the generated low ethylene concentration. When it detects its maximum level, the generator stops the generator. And produce ethylene again when the sensor recognizes the minimum required level.

Onions need three days of ethylene exposure before the sprouts will be blocked. If onions have already sprouted, the ethylene gas will block further cell elongation.

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