Bulbs that are to be taken up should be left in the ground till the foliage turns yellow, or dies down naturally. This gives the bulbs a chance to ripen. Cutting off the foliage and digging too early is a not uncommon and serious mistake. Bulbs that have been planted in places that are wanted for summer bedding plants may be dug with the foliage on and heeled-in under a tree, or along a fence, to stand till ripened. The plant should be injured as little as possible, as the foliage of this year makes the flowers of the next. When the foliage has turned yellow or died down, the bulbs—after cleaning, and curing them for a few hours in the sun—may be stored in the cellar or other cool, dry place, to await fall planting. Bulbs that are lifted prematurely in this way should be planted permanently in the borders, for they will not make good flower-garden subjects the following year. In fact, it is usually best to buy fresh, strong bulbs each year of tulips, hyacinths, and crocuses if the best results are desired, using the old bulbs for shrubberies and mixed borders.
Crocuses and squills are often planted in the lawn. It is not to be expected that they will last more than two to three years, however, even if care is taken not to cut the tops closely when the lawn is cut. The narcissus (including daffodils and jonquils) will remain in good condition for years in grassy parts of the place, if the tops are allowed to mature.
List of outdoor fall-planted bulbs for the North.
Crocus.
Hyacinth.
Tulip.
Narcissus (including daffodil and jonquil).
Scilla, or squill.
Snowdrop (Galanthus).
Snowflake (Leucoium).
Chionodoxa.
Hardy alliums.
Bulbocodium.
Camassia.
Lily-of-the-valley.
Winter aconite (Eranthis hycmalis).
Dog-tooth violets (Erythronium).
Crown imperial (Fritillaria Imperialis).
Fritillary (Fritillaria Mekagris).
Trilliums.
Lilies.
Peonies, tuberous anemones, tuberous buttercups, iris, bleeding heart, and the like, may be planted in autumn and are often classed with fall-planted bulbs.
Some of these bulbs may be made to bloom in the greenhouse, window-garden, or living room in winter. Hyacinths are particularly useful for this purpose, because the bloom is less affected by cloudy weather than that of tulips and crocuses. Some kinds of narcissus also “force” well, particularly the daffodil; and the Paper-white and “Chinese sacred lily” are practically the only common bulbs from which the home gardener may expect good bloom before Christmas. The method of handling bulbs for winter bloom is described under Window-gardening (on *p. 345).
There is nothing special to be said of the culture of the so-called summer-blooming and spring-planted bulbs, as a class. They are tender, and are therefore planted after cold weather is past. For early bloom, they may be started indoors. Of course, any list of spring-planted bulbs is relative to the climate, for what may be planted in spring in New York perhaps may be planted in the fall in Georgia.