Spring flowering bulbs are available for sale online and by mail order during Fall and Winter. and include bulbs such as Tulips, Daffodils and Alliums, all favourites
In general the best time to plant spring bulbs is in the fall at least 1 month before the temperature really drops and the ground freezes.
By planting bulbs while the ground still has a little warmth left in it, the bulbs have the chance to settle in and begin to develop a root system before the winter.
Bulbs are generally planted at a depth that is 2-3 times the height of the bulbs, some exceptions to this are surface planted bulbs such as Hippeastrum and others.
Other bulbs may need to be planted at greater depths. Always ask for specific planting instructions when purchasing bulbs.