The depth of planting is determined by the type of soil and the type of bulb, and is measured from the top of the bulb to the soil surface. Do not use fresh manure near bulbs, as it is believed to be a carrier of botrytis and other fungal diseases to which tulips and other bulbs are very susceptible. Also, keep in mind the height of the flowers when selecting a location. Plant these near an entrance, walkway or patio where they can be seen and appreciated at close range. Repeat this thorough watering a few more times prior to freezeup.
Most gardeners are familiar with daffodils, hyacinths, and crocuses.
Fewer have heard of squills, Tulipa tarda, or ixiolirion. The early ones often come up too early, only to be nipped by hard frost. The better known hybrids have been developed from these species tulips. Many of the species tulips are shorter than the hybrids and are ideally suited for the rock garden. One of the best and most ruggedly hardy is Tulipa tarda.