If you are located in an area which does not get cool enough winters (zones 8b and further south, see link below to find your plant hardiness zone) or would like Hyacinths blooming indoors late winter follow these instructions. The bulbs will need to be in the following environment for 10-16 weeks:
You will need an artificially cool environment such as a refrigerator or chilled cellar. Take care not to place the bulbs near apples or other fruits that produce ethylene gases as this will cause the bulbs to rot.
Choose pots that store easily and are easy to move. 6-8” plastic bulb pans work the best. Fill the containers with a good quality well-draining soil. Make sure the containers have adequate drain holes, this is a must.
Space the bulbs close together, just as long as they are not touching each other or the sides of the container. The plants should be planted just deep enough that the tips of them are showing through the soil.
Water the container well after planting. Keep the soil slightly moist during the cool period, but not wet as this could encourage the bulbs to rot. After you have watered the container you may move it to the refrigerator or chill cellar.
Once 10-16 weeks has passed and you start to see tender shoots forming, you can gradually expose the bulbs to sunlight and warmer temperatures. Keeping the bulbs in a cool 68 degree room in your home is ideal while they are blooming.
Enjoy your lovely blooms!
For optimum growth, the growth season can be found according to your zone. Find your planting zone here: USDA Plant Hardiness Zone Map
After flowering, allow the foliage to yellow and dry before removing it.