Muscari is a small blooming plant that typically only grows to be about 6 to 8 inches tall. It is actually a member of the lily family even though its common name is grape hyacinth. Muscari is considered a hardy bulbous plant that grows well in USDA hardiness zones 3 to 9. Muscari should be planted in the fall to ensure growth and blooms the first spring. Otherwise, muscari can be planted in early spring and it may just bloom for in a couple months, or it may wait until the next spring.
Select a planting site that is in full sun or partial shade. Muscari prefers soil that drains well. If you don't know if your soil drains well, check after a hard rain, and if puddles remain on top of the soil after about five hours, the soil needs amending.
Amend the soil, if necessary, so that it is lighter and drains better. Rake the top foot of your soil and mix in several inches of humus, like peat or compost. Your planting bed will be slightly raised after this, but that is an added bonus, since it also helps water drain.
Remove any weeds. This is easier when it is wet and after tilling. Be sure to get the weed's roots. Pull them up with your hand near the bottom or use a three-prong weeding tool that you hammer into the soil and pull up and under the weed's base to pull up the weed and roots.
Dig holes so that muscari bulbs are buried twice as deep as they are tall. Typically, the tips of the bulbs should be about 4 inches beneath the soil since muscari bulbs are small.
Place the muscari bulb in the hole with the tips facing up. Backfill the soil and pack it firmly down with your hand. Space bulbs 3 inches apart.
Water the planting bed slowly and only as fast as the soil can absorb it. Give it a good soaking.
Cover the planting bed with a few inches of mulch. Bark, wood chips and pine needles are ideal mulches for muscari. Mulch will help retain water and keep the bulbs warmer during the winter months.