I have a roof terrace so I leave mine in the pots every year.. I wait until the leaves rot and turn brown then I cut them off (but not before then) and just put the pots away in the shade somewhere during the summer and every year they just pop back up again.. I have noticed that most of the pots from last year have shoots coming through the soil already..Although Hawkwalk says they wont flower next year- mine have flowered every year since I bought them for the last 3 years - as I say I just leave them in the pots.in the soil - this includes - tulips - daffs - hyacinths - narcissus - iris -.