Keyworth’s Early is a venerable old English hop which was, for a while, discontinued from production due to low yield. Raised at Wye College, England in the 1920’s, it was rushed into production on the back of Dr. W. G. Keyworth’s research in the 1940’s after Verticillium wilt became a major problem in parts of Kent. Due to its promising resistance, it gained in popularity for a while but fell out of favor with both brewers and growers.
Bred from a New Mexico wild male in open pollination, it has recently seen somewhat of a revival and is said to impart lemon and grapefruit notes seen as desirable in todays brews.
|Also Known As||OJ47|
|Characteristics||Lemon and grapefruit notes|
|Alpha Acid Composition||8.6%|
|Beta Acid Composition||3.3%|
|Yield Amount||710 kg/hectare (630 lbs/acre)|
|Growth Rate||Moderate to high|
|Susceptible to||Moderately suceptible to downy mildew|
|Storability||Retains 72% alpha acid after 6 months storage at 20ºC (68ºF)|
|East of Harvest|
|Total Oil Composition||1.39 mL/100g|
|Myrcene Oil Composition||45%|
|Humulene Oil Composition||22%|
|Farnesene Oil||Trace Amounts|
|Style Guide||American Ales|