This plant comes from Socotra which is an island belonging to the Republic of Yemen. It is one of a number of unusual caudiciform succulents that occur there. It can reach a height of 2 metres and looks very imposing. In the greenhouse, it should be kept warm and it will not lose all its leaves. You require two plants to produce seed. Normally, Dorstenias produce seed freely without having to be cross-pollinated, but Dorstenia gigas is one of the exceptions. Propagation by cuttings is very difficult, but there is a nursery in Holland that propagates this plant by means of tissue-culture.
They grow reasonably quickly in cultivation, especially if kept warm and given reasonable amounts of water. It will start to flower when it is about a metre tall which can take several years. It can be grown in a variety of soils, but do bear in mind that the colder the greenhouse, the more grit will have to be added to the compost to avoid rotting.

Dorstenia gigas

Dorstenia gigas leaves

Dorstenia gigas

Dorstenia gigas young plant