Most species are so extremely winter hardy and easy to grow that no garden should be without them.
For a start, hardy breeds like Herdwicks don't have as many lambs as their lowland counterparts.
Even the hardy Scandinavians on the tour are in woollies and thick socks.
This hardy shrub grows well in shade as well as sun and tolerates almost every soil type.
They are also completely winter hardy and have an excellent ability to survive floods and drought.
The mountainous region around the small Corsican town of Bastilyica breeds a hardy , proud people.
Those that are not winter hardy are the bulbs that are planted in spring.
The giant peaks of the Grampians attract hardy walkers like magnets, and who can blame them with such magnificent hills to climb?
The fuchsia isn't necessarily hardy but it has survived one winter outside and in a sheltered spot near a house wall it may well cope again.
If a plant is rated as hardy to zone 2 we know how low a temperature plunge that plant is likely to survive.