How to Force Hyacinth Bulbs Most fall-planted bulbs (such as tulips, daffodils, and hyacinth) require a chilling period in order for them to bloom and grow correctly. In climates where the winter temperatures remain cold enough for an adequate period of time (zones 2 through 7), this chilling period is provided naturally when bulbs are planted outdoors. However, if planting … Continue reading Forcing Hyacinths For Indoor Blooms in 8 Simple Steps