How to Grow Lavender in the Midwest
Harvesting and drying lavender
Lavender may bloom its first year, but it takes three years for plants to mature. Then you will have plenty of blooms to harvest for various uses.
Harvest spikes of mature plants as soon as they bloom. Cut just above the leaves. Don't be afraid to cut a lot of spikes; harvesting will promote new growth and keeps the plants from becoming leggy.
Harvest on a dry day, or after a series of dry days. This will mean less moisture on the plant. Late morning, after dew has evaporated, is an ideal time.
Dry in bundles. Tie six to 12 lavender spikes together and hang upside down on poles or hooks in a dry, dark place. Good air circulation will prevent the lavender from becoming moldy. It should dry in about a month.