Because my birthday is in February I usually get a big pot of Hyacinths as a present from work, (usually from M&S). When they've finished flowering I always plant them in the garden. They sometimes take a couple of years to settle down & flower again properly, but it's certainly worth doing. I buy new bulbs for pot displays every year (to be certain of flowers) but after that they all go into the garden too. Daffs seem to be fine & flower the next year, some of the fancier Tulips do disappear but I get about 50% success. Mind you, as I'm planting the finished bulbs in about May when the borders are stuffed they just get plonked in where ever I can find a gap, I might get more success if I did it properly .