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'