Answer: In my experience, the best way is to use a clean soilless mix and keep the pots in a refrigerator of their own where you can control the temperature reliably during the required chilling period. (A home kitchen refrigerator is not usually a good idea due to damaging gases put out by other foods such as ripening apples.) An alternative is to chill them in say an unheated garage where the temperature is quite cool but not actually cold enough to freeze the bulbs. Another possibility is to sink the pots into the ground and then pull them after the required chilling period has passed. For those of us who may not have the patience for all that, the paperwhites and amaryllis bulbs are planted indoors and will bloom without chilling. I hope this gives you some ideas.
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