BULB FORCING SCHEDULE

 

BULB

 

Cold Treatment

# of Weeks

 

Weeks to

Bloom

Crocus (Crocus spp.)

15

2-3

Daffodils (Narcissus spp.)

15-17

2-3

Fritillary (Fritillaria meleagris)

15

3

Glory-of-the snow (Chionodoxa luciliae)

15

2-3

Grape hyacinth (Muscari spp.)

13-15

2-3

Hyacinth (Hyacinthus)

11-14

2-3

Iris (Iris danfordiae and I. reticulata)

15

2-3

Paperwhites (Narcissus tazetta)

None

5-6

Puschkinia (Puschkinia libanotica)

15

2-3

Scilla (Scilla spp.)

15

2-3

Snowdrop (Galanthus nivalis)

15

2

Tulip (Tulipa hybrids)

14-20

2-3

Winter aconite (Eranthis hyemalis)

15

2