Coleus Canina
 

Experiments with over 300 plants have now produced the ultimate deterrent.
Cats, dogs and even foxes will avoid the Pee-off plant as it's
affectionately known. Coleus canina has excellent foliage and small,
attractive spikes of blue flowers in the summer, and releases a stench that
cats can't stand. Thankfully it only smells to the human nose when touched!
Could this be the solution to your feline intruder problems you've been
longing for? Annual, but can easily be propagated and cuttings kept in a
frost-free place over winter. Plants need to be established before the smell
is released, be in drier rather than wet soil and planted every 1-2 metres.
Supplied as cell-raised plants

http://plants.thompson-morgan.com/uk...2131/1?SA=1303