Going onis always a problem, and it is not necessarily best to let a helpful neighbour look after your prize collection while you are away. A fortnight of well inten-tioned but over-enthusiastic could be fatal. Don’t leave your plants shut up in a room. If the inside doors are open they will benefit from a flow of air. Leave them out of direct sunlight and standing next to each other so that they produce their own damp microclimate. An empty bath is a good place for this.
There are several kinds. Capillary mats are suitable for plants in plastic, but not clay , as these absorb too much moisture. There are hollow ceramic ornaments with porous spikes which release water gradually into the . You can make a self-watering device with a plastic bottle by piercing a hole through the stopper, upending the bottle and pushing it into the soil. You can also use lengths of thick wool with one end in a jar of water and the other lying on top of the .