Tarragon:Is it Perennial?How to avoid Rust?

[Eco-Chic]

I bought pots of Tarragon on two occasions last year and returned them to B&Q because they developed considerable rust a few days later.

In one case I had immediately pinched out a few cuttings which took well (I didn't feel guilty because I wasn't compensated for my time and petrol for returning the duff plants).

The cuttings didn't develop rust. Could it possibly because I kept them under plastic, although the front was kept open, and watered from underneath?

Am I right in thinking Tarragon is perennial (always assuming the cuttings haven't succumbed to frost)?

[Jardiniere]

I've never had rust (well not on my tarragon).
My little pot of french tarragon - yours is french isnt it? Not Russian? is coming up again now having been outside all winter and exposed to frost/snow/hale/neglect.....

[Eco-Chic]

Yes it was French Tarragon. Apparently it was quite a problem last summer but the Russian stuff was unaffected.

Hopefully my cuttings will grow through in a while. They've been over wintering in the placcy greenhouse which I forgot to close (they may be suffering from the drought too)