Blue Guava is a well-crafted hybrid that is believed to be a cross between Guava Kush and Blue Dream, two popular cannabis strains. The exact genetics of Blue Guava strain may vary depending on the breeder, but it is typically a balanced hybrid with a fairly high THC content. The THC levels in Blue Guava can range from 18% to 22%, making it a potent strain that is cherished by both recreational and medicinal users alike.