frost-tolerant hanging plants for south-facing wall

Can anyone makes plant suggestions for a new raised garden in central Spain?
The plants will hang over 2 metres of south-facing wall and hopefully cover
it with a cascade of year-round colour and greenery. They need to be frost
hardy to -10oC /14oF  and should be able to cope with summer temperatures of
up to schorching 42oC /108oF. Watering in this case not a problem.

Favourite suggestions so far include Rosmarinus spreading cultivars (like
Rosmarinus officinalis 'Boule') but I would like to mix with faster-growing
species that will give results in a year or two. We have a lot of wall to
cover!

The wall can be seen here...
http://img311.imageshack.us/my.php?image=rimg0004edited6np.jpg
(it's the brown wall at the bottom of the picture, it is about 2 metres high
and it serves as a bank for our future "raised garden" behind it).

Any and all thoughts most welcome....

Damian
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