Are you thinking about forcing spring bulbs? Most of us will never have a March forced bulb display the way Smith and Mount Holyoke colleges do, but visits to these heartening spring flower shows do make the point that we can create an early spring in our own houses. October is the month to prepare to force our favorite bulbs, daffodils, hyacinths, grape hyacinths, scillas, and amaryllis. The theory behind bulb forcing is that we have to…