[6]​ Brewer's Gold fue su primer lanzamiento comercial, introducido en 1934, casi tres décadas después de que comenzó su investigación en Wye College.

[11]​: 181 [note 1]​ Hasta cerca de 1900, there were no large scale, scientific attempts to cultivate new varieties of hops.

[2]​ By 1917, Salmon and Wye had partnered with the East Malling Research Station to grow hops on a larger scale, in order to evaluate the commercial properties of promising crosses.

[ESS 3]​: 578 Salmon's first goal for the hop breeding program, as an extension of his research in plant pathology, was to develop disease-resistant strains.

[2]​: 16  Salmon noted early on that English brewers were forced to blend in American-grown hops for their higher preservative value, despite this inferiority, and his breeding research expanded to include this criteria.