Garden Prince and Penta varieties, which are classified as self-fertile, meaning they do not need a pollinating partner. However, 'even these varieties will generally produce a better yield if planted ...

amara — is the result of a recessive gene in the sweet almond tree, Prunus dulcis. As such, the trees themselves look, even to the well-trained eye, identical. Prunus dulcis var. amara is far ...