Dragonfruits and tree tomatoes can be bought in supermarkets or fruit shops.
Dragonfruit is grown on the cactus Hylocereus :
- Hylocereus undatus (Red Pitaya) has red-skinned fruit with white flesh, the most common “dragon fruit”.
- Hylocereus costaricensis (Costa Rica Pitaya, often called H. polyrhizus) has red-skinned fruit with red flesh
- Hylocereus megalanthus (Yellow Pitaya, formerly in Selenicereus) has yellow-skinned fruit with white flesh.
The fruit contains hundreds of black, shiny little seeds sitting in the pulp. One can wash out the tender pulp in a fine sieve and dry the seeds on a plate (not on paper). They usually germinate around two weeks after shallow planting. Dry seeds can be sent to us (Beeweg 36 – BE9080 ZAFFELARE (Belgium). We offer free seeds to different development projects in the drylands, thus enabling hungry people to grow fresh fruits in a sustainable way.
The tree tomato grows on a Cyphomandra betacea tree.
Oval fruits only look like tomatoes. The juicy orange pulp with purply red seeds can be washed out in a fine sieve by squeezing the pulp under running tap water. The dark colour of the seeds (anthocyanins) disappears gradually until they are brownish. Seeds can be dried on a plate (not on a paper). Seedlings develop quite easily in humid potting soil.
Dry seeds sent to us (see address above) are offered for free to development projects in the drylands, where these tree tomatoes bring fresh food full of vitamins to the local people. Thus, anyone can contribute to alleviate hunger and malnutrition in this world.