About Rio Red Grapefruit Trees
About Rio Red Grapefruit Trees. The Rio Red grapefruit has become one of the most popular citrus fruits in the market and the home garden alike. It is a staple of Texas agriculture, where the Texas Rio Red has been trademarked as Rio Star. It has a very high brix ratio, which is the proportion of sugar to acid. Rio Red are more cold-hardy than the Star Ruby, which makes it more desirable for both market growers and the home gardener.
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