Ours has not flowered yet and as it looks fine am not worried!

Yes, it could be due to the weather - many plants have been checked by the cold this year.

We've got plants that have sat in bud for the past two or three weeks and plants that have been in flower for nigh on a month when usually the flowers are over in a couple of weeks. 'Tis the very odd season.

Thanks for the response, I'm just hoping it will get warmer soon!!!

Well, it may, or it may not!