Each year between February and early March, California almond orchards burst into bloom—and time is critical to set a strong crop.

The longer the bloom lasts—and if weather cooperates—the better the chances for each almond flower to be pollinated, leading to stronger nut set and improved yield potential.

“Keeping the almond bloom viable longer is important for pollination—especially if wind, cloudy days or rain interfere with bee activity,” said Kevin Forney, Valent PGR product development manager. “By keeping the flower alive longer, growers can help ensure the success of their investment.”

Keep Flowers Alive Longer

There has never been a way to extend almond flower viability—until now. ReTain^® Plant Growth Regulator for California extends the viability of almond bloom, allowing more opportunity for pollination and helping ensure optimum crop load potential.

ReTain works by reducing the blooms’ production of ethylene, a naturally occurring plant hormone. This delays flower and stigmatic senescence, resulting in flowers remaining viable longer and increasing the window for successful pollination.

“ReTain is a proven technology with established use patterns for fruit and nut set in California cherries and walnuts,” Forney said. “It now offers an innovative approach for increasing nut set in almonds and enhancing crop load potential.”

Extend the Pollination Period

Field studies have shown that ReTain can extend the life of an almond bloom, providing up to a 43% longer pollination period compared to untreated trees.

Boost Nut Set for Optimized Yield Potential

In 70 commercially applied research trials conducted over five years, ReTain increased Nonpareil almond yields by an average of 193 pounds of nutmeats per acre compared to untreated checks.

Apply from 30% to 60% Bloom

ReTain can be applied from 10% bloom through petal fall, with optimal results typically achieved when applied between 30% and 60% bloom. It is easy to use, requiring just one water-soluble pouch per acre.

“To capitalize on a longer almond bloom and, most importantly, increased nut set, growers can now rely on ReTain,” Forney said.

To learn more, visit valent.com/ReTainCA or contact your PCA.

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