The Scotch Crocus, or crocus biflorus is lavender in color and it grows to about 4 inches. These are frequently used in rock gardens and look beautiful when combined with other varieties.
Crocus chrysanthus or snow crocus have very small blooms. The leaves appear after the blooms with this variety. This variety is very hardy and is one of the earliest bloomers in the crocus family. They are generally bright yellow, white, or blue.
The Dutch crocus, Latin name crocus vernus, is probably the most widely planted. The flowers are quite a bit larger than most other varieties. They are often planted in clusters of 8 to 12 bulbs. This type is the variety that is sometimes used to naturalize a lawn.
As far as the soil goes in which you plant crocus bulbs, they like sandy soil that drains well. This is what makes them ideal for rock gardens and herb gardens. When planting crocus:
- once you have dug the area for planting, loosen up the soil.
- Add sand or small gravel to the natural soil so that it drains well.
- Add a fertilizer to the soil.
- Plant the crocuses about 5 inches deep, or if you do have sandy soil, a little deeper than this is better.