Grow like a weed! In fact when we first bought this place we had no experience at all with farming so we rented the land to a grazier. When he saw some calla lillies growing in a couple of the paddocks he said he wanted to spray them all. ( I never found out his reason, if they're poisonous the cows don't eat them, so they wouldn't get ill and they don't seem to spread ~ the lillies, not the cows.)
We told the grazier that for starters we don't spray anything and secondly I love them! I could just hear him thinking "Blooming Townies!" He never really got me!
Coming from the northern hemisphere and having never had a garden where I could grow things, I used to buy these. And they were expensive! When I was over visiting mum and dad in April we went to a garden centre and I saw a plant for sale, it was about quarter the size of the ones that grow in the paddocks and it was 30 pounds!!
At this time of year and for a good few months, they grow beautifully, I pick them for the house and they look stunning.
Bathroom update - waterproofer is here today, bathroom is now a lovely shade of turquoise blue ~ who knew waterproofing was so pretty! Tiler is coming tomorrow - he needs a couple of days... electrician here tomorrow, and builder is doing stuff with the sink.... we're getting there...