To grow and flower well, most bulbs, including tulips, need lots of
sunshine from the moment they push through the soil in early spring until
their foliage yellows and collapses. Daffodils can tolerate a bit of
shade, but if they get less than half a day of sun, they may not bloom in
future years. In warm climates, a bit of afternoon shade--even for
sun-lovers like tulips--can be a good thing, helping to prolong bloom and
keep flower colors from fading.
The following bulbs can get by very well on just half a day of sun or in
the filtered sunlight found under deciduous trees. But be warned: No bulb
will thrive in deep shade.