A bottle should be wide at the bottom with taller sides and a narrow but wide enough (2-3 cm diameter opening) mouth for enabling the plants to be inserted.
Bottle garden can be placed any where either vertically or horizontally on a stand .
They may be called as miniature greenhouse in which liliputian landscapes are planned.
Any size of bottle, jar, or jug is suitable for gardening provided these are made of clear glass.
It is a novel way of growing some moisture loving indoor plants, which may be otherwise impossible to grow in a dry house.