Almond (Prunus dulcis )
It is hardy to zone 7. It is in flower from Mar to April, and the nuts ripen in October. The flowers are pollinated by Insects. The plant is partially self-fertile.
Thrives in a well-drained moisture-retentive loamy soil. It prefers a Mediterranean climate with a clear distinction between winter and spring. There is also likely to be a shortage of pollinating insects around when the tree is in flower so hand pollination may improve the crop.
There are two basic forms of almonds, one with bitter nuts and one with 'sweet' nuts. Although the bitter forms are used in making marzipan and as a food flavouring, the seeds themselves should not be eaten. Trees are hardier when grown on a plum rootstock.