ReTain® Plant Growth Regulator for California Soluble Powder

PGRs & Protectants

Extend Bloom. Increase Nut & Fruit Set.

ReTain® PGR for CA increases nut & fruit set in almonds, walnuts & cherries to optimize crop load potential. ReTain works by reducing ethylene production in blooms—delaying flower and stigmatic senescence. This results in flowers being viable longer, which allows more time for pollination to occur.

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PGRs & Protectants

ReTain® PGR for CA Enhances Nut Set in Walnuts

ReTain® Plant Growth Regulator for California consistently increases nut set in walnut orchards that suffer from low nut set due to Pistillate Flower Abscission (PFA).

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PGRs & Protectants

Run Stone Fruit Harvest on Your Schedule.

ReTain® PGR for California gives more flexibility and control of orchards by extending the harvest window and improving stone fruit quality. ReTain is proven to reduce preharvest fruit drop so yield doesn’t fall to the ground giving more time to pick higher-quality fruit.

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ReTain® Plant Growth Regulator for California increases nut and fruit set in almonds, walnuts and cherries to help ensure an optimum crop load potential. The naturally occurring active ingredient in ReTain works by reducing ethylene production in blooms thus delaying flower and stigmatic senescence. This effect results in flowers being viable longer, which allows more time for pollination to occur.

In addition, ReTain consistently increases nut set in walnut orchards that suffer from low nut set due to Pistillate Flower Abscission (PFA).

  • Extends Pollination Period
  • Improves Crop Load Potential
  • Proven Technology for Fruit and Nut Set
  • For Walnuts, Increases Yield in PFA-sensitive Walnut Varieties
  • For Stone Fruit, Improved Fruit Quality and Harvest Management

Sustainable Solutions Criteria – ReTain® Plant Growth Regulator for California Soluble Powder

Valent U.S.A. has developed a classification system that defines and identifies sustainable practices and attributes applicable to our ag product portfolio across three pillars of sustainability – People, Planet, and Productivity. This system, called Sustainable Solutions Criteria, uses specific icons that highlight these key sustainable practices and attributes for our products. Products that achieve a high sustainable criterion ranking across all three sustainable pillars are also denoted by the Sustainable Solutions Icon. Click on the icons below to learn how ReTain® Plant Growth Regulator for California Soluble Powder can support sustainable practices in your operations.

2026 ReTain® PGR for California Grower Rebate Program

The ReTain PGR for CA Grower Rebate Program offers growers an opportunity to earn a reward, up to $40 per ReTain PGR for CA pouch (11.7 oz) purchased, while getting the advantage of optimizing the benefits of ReTain PGR for CA in multiple crops.

Full Program Details

Extend Bloom. Increase Almond Nut Set.

Learn how to extend almond bloom and increase almond nut set with ReTain® PGR for California.

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ReTain® PGR for CA Almonds Educational Ebook

Take a look at the data and science behind ReTain PGR for California to extend almond bloom and boost nut set.

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Use of ReTain® PGR for CA to Reduce PFA in Walnuts

Pat Clay, Valent U.S.A. Manager of Field Market Development for the West, discusses the use of ReTain® PGR for California to consistently increase nut set in walnut orchards that suffer from low nut set due to Pistillate Flower Abscission (PFA).

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