Origin and Description
Riwaka Hops, otherwise known as D Saaz, came from the same breeding program as Motueka from the Hop Research Centre at HortResearch in Riwaka New Zealand. 1997 marked the year of this hops variety's release and Riwaka has not exactly taken the world by storm, it is seen as a quality hop with some very good attributes. As it should, being a cross between the prided Czechoslovakian Saaz and a New Zealand variety. Like Motueka, Riwaka is another triploid hops variety, common from the breeding program.
Riwaka Hops is an aroma variety with an alpha acid rating of 4.5% to 6.5% and a favorably low alpha to beta acid ratio. This variety has a high level of co-humulone which is not desired by some brewers. With a high total oil concentration, the myrcene oil content dominates the other oils with a whopping 68%. This definitely helps provide the citrus notes, include tones of grapefruit. Riwaka Hops is appropriate from beginning of boil to dry hopping in beer batches, Myrcene breaks down with heat, so for greater aromatic potency delay your temptation to throw this New Zealand hops variety in the kettle.
Riwaka Hops lives in a disease free environment in New Zealand. Its tolerance and susceptibility to disease and fungus is unknown at this time. Riwaka has a moderate growth habit that results in loose cones early in the season. Loose hop cones are more difficult to harvest if not picked at the right time due to drying and flaking of the cones. Saaz or Motueka will make a good substitute if you cannot find this variety on the market.
Riwaka Hops Usage
Riwaka hops is commonly used as as aroma agent in beer.
Riwaka Hops Characteristics
Below is a list of characteristics for riwaka hops that impact farming, chemistry, transport & trade, beer production, as well as the final character of the finished product.
Riwaka Hops Acid Composition
|Alpha Acid Composition||4.5%-6.5%|
|Beta Acid Composition||4%-5%|
Riwaka Hops Cone Physical Characteristics
|Riwaka Lupulin Color||Yellow|
|Riwaka Cone Size||Medium|
|Riwaka Cone Density||Loose|
Riwaka Hops Growth, Harvest, and Storage Details
|Yield||Yield for Riwaka Hops is Low at 1200 - 1500 kg/hectare|
|Susceptibility to Disease and Pests|
|Storability||Riwaka Hops maintains 60%-70% alpha acid comtents after 6 months storage at 20 degrees C|
|Ease of Harvest||Poor to Good|
Riwaka Hops Oil Composition
|Total Oil Composition||1.5-1.5 mls/100 grams|
|Myrcene Oil Composition||68%-68%|
|Humulene Oil Composition||9%-9%|
|Caryophyllene Oil Composition||4%-4%|
|Farnesene Oil Composition||1%-1%|
Riwaka Hops Substitutes
|Motueka||Motueka Hops is another name B Saaz, and was bred in New Zealand using 1/3 Saaz and 2/3 New Zealand variety. It is a t...|
|Saaz||Saaz Hops has changed the world of brewing forever, as it is an esteemed and honored variety that helped to define European Lagers and Bohemian Pilsners. It is...|
Common Beer Styles for Riwaka Hops
|American Amber Ale|
Riwaka Hops Use in Commercial Beers
|Website||Brewing Company & Beer or Product|
May Day Stout
|Kelham Island Brewery|
|666 Brewing Company|