Drying mullein properly is one of the most important steps in preserving the quality, aroma, color, and natural character of the leaves.
Fresh mullein leaves contain moisture, so they should be dried slowly and thoroughly before being stored or used for tea, tinctures, powders, or other preparations.
When to Harvest Mullein Leaves for Drying
Choose healthy, clean leaves that are free from insects, disease, or damage.
The best time to harvest is during dry weather, after the morning dew has evaporated. Avoid harvesting leaves that are wet from rain or heavy dew.
You can harvest individual leaves as the plant grows rather than removing too many leaves from one plant at once.
Preparing the Leaves
Gently shake or brush away dirt and insects.
If the leaves are reasonably clean, avoiding unnecessary washing is helpful because additional moisture makes drying take longer.
If washing is necessary, rinse gently with cool water and pat the leaves dry with clean towels before beginning the drying process.
Air Drying Mullein
Air drying is a simple, traditional method.
Spread the leaves in a single layer on a clean drying screen, rack, tray, or clean paper-lined surface.
Keep the leaves in a warm, dry, well-ventilated area away from direct sunlight.
Turn the leaves occasionally so air can reach both sides.
Do not pile fresh leaves deeply on top of one another. Good airflow is important.
Depending on temperature, humidity, and leaf thickness, drying can take several days.
Using a Dehydrator
A food dehydrator can also be used.
Arrange the leaves in a single layer so they are not touching excessively.
Use a low temperature and allow the leaves to dry gradually.
The exact drying time will vary depending on the dehydrator, humidity, and thickness of the leaves, so check them regularly rather than relying only on a set time.
How Do You Know When Mullein Is Completely Dry?
This is important.
The leaves should feel dry and crisp, with no cool or damp areas remaining.
A leaf that bends without breaking or still feels soft may contain moisture.
Before storing the leaves, make sure they are thoroughly dry. Any remaining moisture can lead to mold during storage.
Storing Dried Mullein Leaves
Once completely dry, gently place the leaves into a clean, dry, airtight container.
Store them in a cool, dark, dry place away from sunlight, heat, and humidity.
Label the container with the type of plant material and the date it was dried.
Check stored leaves periodically. If you notice moisture, unusual odor, discoloration, or mold, discard the affected material.
A Little Mullein Farm Tip
Mullein leaves have tiny hairs on their surface, which is one reason they are so distinctive.
When preparing dried mullein for tea or other uses, many people prefer to strain the finished tea very carefully through a fine filter because those tiny hairs can be irritating to the throat.
At Mullein Farm, careful harvesting and drying are part of preserving the natural character of the plant from the g