We grow it in our flower beds, more for entertainment value than anything else - love to watch those snooty cats lose their self control.
It survived the snow here. Not a particularly bad winter, but it is regrowing now very happily.
I grow mine on the edge of my borders. When the flowers start to go tatty in midsummer, cut them back by half and they will come back with another show of flowers. Cut back again in late autumn and they will sprout new shoots around now, when you can cut off any dry stems. They have survived -10°C with no problems here.
Strangly, our cat shows no interest in them at all!
I had a splendid plant some years ago when there were very few cats round here. hey still decimated it though. It was, for me, quite an expensive buy so I haven't tried since and now there's many more cats I'm not likely to unfortunately.
I love it Robyn. Like others say, hardy and really easy to propogate. The flowers last ages too. I adore watching the cats have a good time on ours. Mine was a tiny plant when I got it. Plonked it into a border at the front and it grows to quite a size in summer. I cut it right back when it's done its thing. Bees also love it.
I've grown it for a few years, and it sometimes survives the winter outdoors, but not always. It also sometimes self seeds and grows again in the same patch, but not always, probably because cats love it too much and nibble it and roll all over it before it gets established and grows again.
I grow it in pots in the greenhouse, and plant out when its established, into an area of the garden where I'm happy for the cats to enjoy it. It over winters ok in the greenhouse and is ready for the garden in spring, as well as a fresh source of leaves for the cat in winter when there would be none still growing outdoors.
My seeds were originally Mr F's variety, Nepeta Cataria.
From what I've read, not all cats react to it, maybe around 2/3rds. Of those, some prefer it fresh and green and straight off the plant, others prefer it dried like it would be in cat toys.
It's a wonderful plant, both for cats and pollinating insects.
I think our cat really loves it. It's one of his favorite hang-out spots in summer.