The Garden Bug: Grape hyacinths
By Brenda Weaver
These plants start from small bulbs. Place them in groups of ten or more, with the bulbs twice as deep as they are tall and a couple of inches apart. They grow in sun or light shade. Don't plant them where it's too wet or too dry. They spread very quickly, and can be quite invasive; plant them where they can spread freely.
The flower spikes don't appear until mid-spring. Smoky blue is the most common color. Once their leaves die off, you can cut them back.
Source: www.gardeningknowhow.com