Horticulture Little Know Spring-Flowering Bulbs Tulips and daffodils are spring favorites of Iowans. Many gardeners, however, are unaware of the wide variety of hardy, spring-flowering bulbs. Little known bulbs, such as snowdrops and Siberian squill, offer exciting opportunities for gardeners. Consider some of the following spring-flowering bulbs when planting this fall.
Flowers are white, yellow, or pink to purple.
They bloom from late spring to early summer. Alliums grow best in full sun. The solitary heads are borne atop a 3 to 4 foot tall stem. The giant onion usually blooms in late June. Lily leeks grow 8 to 12 inches tall and are best utilized in borders and rock gardens.