Winter protection for a tender grass

TheGardener

In spring at a plant fair I bought on impulse, a 9cm pot of a rather lovely ornamental grass (Pennisetum Alopecuriodes) and it has managed to grow from a little sprig to a rather magnificent specimen plant in one summer! I'm quite proud of it but I am aware it needs winter protection - any suggestions? I don't want to lift it as it obviously likes the spot its in (southwest facing with sun all day until 6pm ish but very little sun late autumn through March) Should I try wrapping it like a fern do you think?
I'm in the North West with a relatively sheltered garden but have frost pockets.

I_have_spoken

Unless it's in extremely well-drained ground, I'd lift it and overwinter in a cold greenhouse or similar. It's often wet roots more than cold that does the damage.

Davesnave

Strangely enough, I was looking at one of these on Friday, mainly because it's the first year it's flowered....and it's been planted around 6-7 years!

You may be surprised to learn that it's living at 750' on the Mendips and not protected. Until last year it was sitting close to the house wall, facing south, but not having flowered, it was shifted to a more open position, still with sun all day. The garden is sheltered and very well-drained.

Of course, last winter was very mild 'darn sarth.'

TheGardener

Despite its rapid growth to over half a meter across and height - and to be fair, its only since the sun came out in late summer that it has really thrived - it only has a single flower (but it was only a tiny thing when I planted it in late spring). Its on the south side of a neighbours monster leylandii so it gets plenty of sun but it is dry, poor soil. I have looked about on line and am finding contradictory advice on care/hardiness. RHS say down to -10 but a large specialist retailer say frost tender so I guess I'll just have to watch out for long cold spells/snow (do we even get those anymore?)
Ihavespoken - it is very dry where it is so I'm hoping lifting it is a last resort

Mr.Generous

One thing I always have to get rid of is old failed sealed units from double glazing, my brother takes them to an allotment site sometimes as the gardeners use them to make home made cold frames to protect plants. Got an 8ft x about 2ft6in panel and a few smaller ones free to anyone who wants them. Is it in a position you could protect with glass?

TheGardener

Actually that's a thought - a sort of individual cold frame might be the way to go if needed. Not sure I'll be using old DG units but a bowl of chicken wire stuffed with straw or covered with fleece might be useful. I'm hoping the plant will be tougher than I thought (thanks Davesnave)
Thanks
(P.S if the local council catch you taking DG units to a council run allotment - you might end up getting done for flytipping and the plot holder evicted for bringing commercial waste on site )