You Will Get 5 Seeds Poncirus Trifoliata Hardy Trifoliate Orange Tree. This is a beautiful small tree, that gets fragrant white flowers, and it actually produces sour but edible oranges.. The fruit is extremely sour or bitter, but is sometimes used to make a lemonade type beverage or marmalades.. It is a rounded upright grower, and this is deciduous.. They are hardy to at least USDA zone 5, and possibly colder.. These plants would make excellent additions to your rare plant collection, or just make a unique statement in your yard.