Forcing Bulbs in Soil - Step 4
Saturate the planting with water, then allow it to drain. To force the bulbs for early bloom, chill them for the recommended length of time for the species, keeping the soil damp until sprouts emerge. (They can be chilled in the coldest, darkest spot in your house – try your basement, garage or root cellar if you have one.)
Photo Credit: ©2002 Dolezal Publishing/John M. Rickard