How to force bulbs to flower
Flower growers have been forcing bulbs to provide cut flowers for many years and if you wish to have bulbs flowering 'out of season' you can to. Tulips, Hyacinths, Crocus and in fact many flowering bulbs can be encouraged to flower with a little help.
Bulbs will naturally flower in a season such as autumn or spring, and flowering is triggered by changing climate. So for spring flowering bulbs like daffodils and hyacinths you need to give them a winter (3 months in the cold) and then bring them out to a spring environment.
Water and fertilise as normal and move them to a sunnier position once they show good sign of growth, avoid d irect hot sun through windows and such.
Hyacinths are so popular that they have their own, forcing jars, but you can use them for other bulbs as well. These forcing jays usually come with instructions.
So what bulb can be forced : Tulips, Hyacinths and Daffodils are favourites, you can also try Crocus, Chiondoxia and Dutch Iris