Hi SimRice,
Thanks for that.
Sadly I have about a 1 metre wide strip that will basically never see sun during the winter months and that concerns me as I'm sure that it will have that section taken over with that nuisance clover that surfaces during the colder times of the year. Currently as the sun is more in the southern sky the whole area gets sun all day long but if there was a couch that's a bit more shade tolerant then I'd try that instead of Santa Ana.
Cheers,
BB