If you have gone to the trouble of planting flower bulbs, it can be disheartening if they do not bloom. If you planted your flower bulbs months ago and they did not come up at all, dig down to see if they are still there. It could be that rodents came and stole your flower bulbs.
Another reason your flower bulbs may not have come up at all is they may have rotted. If you planted your flower bulbs in an area that drains poorly they probably went to mush. If your bulbs have leaves but no flowers, it is probably because they were not stored properly prior to planting. They may have gotten too hot, too cold, or they may have been stored next to something that put off a gas that killed them such as ethylene gas or apples.
Many times people purchase bulbs at the last minute when they are on sale and they are dead. To find out if a bag of bulbs has died, cut one or two of them in half. If the inside of the bulb is dried up and brown, the bulbs are dead. Lastly, your bulbs may not have bloomed if you planted them in an area that is not friendly to them. For instance, bulbs need sufficient sunlight. If they did not receive this they may not have had enough food reserves to produce flowers.