Thriving since 1960...
Thriving since 1960, my garden in a bottle: Seedling sealed in its own ecosystem and watered just once
David Latimer first planted his bottle garden in 1960 and last watered it in 1972 before tightly sealing it shut 'as an experiment'
The hardy spiderworts plant inside has grown to fill the 10-gallon container by surviving entirely on recycled air, nutrients and water
Gardeners' Question Time expert says it is 'a great example just how pioneering plants can be'