Bulbs often show above the ground in late autumn. You can always cover them with some mulch to protect them.

Don't worry Strude! Muscari are among the strongest of the bulbs MG mentioned--they always come up in the fall, and the leaves stay with you all winter, even under snow, until after they bloom in spring. My "neighbors" in Flagstaff, Arizona (-29 C winters) never have a problem with them.

Only trouble we have is pouring weedkiller on them. And still they grow and spread like the weeds they are.

I grow mine in poor soil in the rockery ODB and I find they dont spread in fact I wish they would do better and multiply a bit!

We planted 25 of them in the gravel garden and have over the years dug out 1,000's . They spread by division and if I miss dead heading they spread by seed. The white ones revert to blue as do the pale blue ones. Even M. latifolia (the light and dark blue ones) are becoming a nuisance too. They are now appearing in the roadside verge outside the garden where they are regularly driven over by tractors etc. Nothing stops them.

We too are at the dig em out stage with them.

Thanks for all comments, very helpful, I knew they spread but they are supposed to be good for wildlife so i have put them in a pot in the garden.

Good for what wildlife?

Grape Hyacinths are listed as good flowers for butterflies.

I have bought some muscari bulbs, I may have to keep an eye on them over the years.

Butterflies are not around when they are flowering in our neck of the woods.

Grape hyacinths are an early nectar plant apparently, attracting early season insects, eg hoverflies