Guavas can be stored at room temperature for a few days. Mature but green guavas can last for 2 to 5 weeks when kept at a regulated temperature between 46F and 55F and relative humidity of 85% to 95%. To hasten ripening, the guava can be kept wrapped in a paper with a banana or apple. Fully ripe guavas can be refrigerated for a few days. Pink and white guavas yield to gentle pressure if they are ripe. Ripe guavas can be kept in plastic bag or container and refrigerated for a few days. It is advisable to use them within a day or two. Unripe guavas can be stored in a plastic container or bag and can last for about two weeks. Freezing the guavas can make them last longer, even up to a year. To freeze a guava, cut it and place it in a freezer container.