The family business was established in 1949 by Ray Samwell at Summertown in the Adelaide Hills. Rays two sons, Kent and Leigh Samwell joined the business in 1972 and in 1985 the business moved to Mount Barker. The land consisted of 250 acres. It was decided at the time to focus on Brussels Sprouts and Vegetables in the Brassica family.

In 2019 Eastbrook is still a family managed farm. Brussels Sprouts and Kalettes and Cabbage are grown on their properties at Mount Barker (500 acres), Nairne (200 acres), and Langhorne Creek(700 acres).

Eastbrook currently supply Australia wide to numerous outlets including Aldi, Coles, Adelaide Wholesale Markets and Fresh Wholesale Markets Australia wide, Foodland, IGA and Klose supermarkets.

Over the past 10 years, Eastbrook has focused specifically on the Brusselssprout market, and their aim has been to cement their place in this industry and to be known for consistent supply and quality, and with this, to be seen in the produce industry as innovative and industry leaders.

The decision to focus on Brusselssprouts has allowed them to experiment with and trial many different varieties. This has improved quality and supply, as they now grow specifically for the Adelaide Hills climate.

Eastbrook employs 5 full time staff and approximately 30 casual staff who work on a seasonal basis.