I have recently come across some information about Jujubes or Chinese dates. Apparently they grow really well here in WA and provide a good source of vitamins from quite early in August, a time when not much else is fruiting.
They can be eaten fresh or dried for storage. They can also be boiled with water to make a syrup for sweetening.
I will be contacting Tass1trees to see if they have any in stock. Jujubes grow 7-10 metres high on thorny trunks.