Miren con lo que me encontré hoy:

growingyourgreens ha respondido a tu comentario sobre Harvesting Ripe Pineapple Guava aka Feijoa Acca sellowiana:
      Im saying my feijoas were from the nursery, but sold as unnamed varieties, and they taste BETTER than any named variety I have tasted this far.  That being said, the secret is in the soil.  Be sure to add rock dust and rich compost to provide the tree everything it needs. Im not sure if mine were originally from seed or cuttings.

Es decir que para que tengan buen sabor hay que asegurarse de brindar buen compost, un suelo fértil.