I would suggest that you plant in deep pots now and, if they grow, put the pots beneath a suitable shrub next spring. When they die down at the end of next summer then unpot them and plant in the garden. Remember where you have put the pots and keep them watered next year.

Thanks for your quick reply Bulbaholic :>)

By the way... Bulbaholic.. When I put them in pots now should I put these pots in the greenhouse before your suggestion next if they grow to put under a shrub?

Whilst they are fully hardy, Michael, the tuberous roots are quite fleshy. I would keep them in an unheated greenhouse to reduce the chance of the getting frozen solid. I suppose than an alternative would be to bury the pots in the soil in the garden until the end of winter.