I bought this plant while on holiday in Italy. It is also known as caviar lime tree. I was curious about this tree as I have never tasted them or seen them before. As the name said it does indeed looks like caviar with a strong lime taste. I bought it for 25 Euros at a local garden shop near Albenga a seaside town by the Northern Italian riviera. I first saw the plant on Sutton’s website £39.99?!! Wow?!! It was fruiting when I bought the tree, harvested them and now fruiting again. I love growing unusual plants as it is rare that one will never get to taste the them from the supermarket or shops and it adds variety to one’s diet.
Google search says it is native from Australia grown in the subtropical climate. They are frost tolerant till -5 deg Cel. It’s a foodie delicacy at the moment a bit like Yuzu.