The remaining 10% was sold under a contract packing agreement with B&G Foods North America under the Green Giant label.

During the 1960s, the company expanded with new plants and products, including the nation's first frozen apple juice concentrate, under the Seneca brand.

During this time, the Prosser, Washington, plant was opened for the production of applesauce and fruit juices, and the company added brokers and expanded distribution.

Seneca stock began trading in the over-the-counter market, and apple juice enriched with vitamin C was introduced – a first in the industry.

Through one of these acquisitions, Julius G. Kayser joined Seneca and played a key role in the company's growth until his death in 1988.

At the end of the decade, the company sold its juice and applesauce operations and raised capital with a shareholder rights offering.