How to Harvest Lavender

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If you put lavender in water, it won't dry well.
If you put lavender in water, it won't dry well. (Image: llvllagic/iStock/Getty Images)

An ornamental garden plant, lavender (Lavandula spp.) contributes fragrance as well as landscaping value. Shrubby plants are usually 2 to 3 feet tall, have tidy, gray-green to green foliage and abundant stalks of purple, blue, pink or white flowers, depending on the species or cultivar. In general, lavenders are hardy in U.S. Department of Agriculture plant hardiness zones 5 through 11, with variation depending on the species. Once established, garden lavender yields fragrant flowers for things such as potpourri, sachets, cooking and soap-making. Use leaves in potpourri and cooking. Harvesting techniques depend on the intended use.

Fragrance Production

If you examine a lavender flower on the stalk, you'll see that the tubular flower emerges from an elongate, somewhat papery structure clothed with plant hairs. Called the calyx, the structure's outside is ribbed, with oil-secreting glands beneath the hairs. This is where the majority of lavender's scent originates and why you want to harvest the whole flower head rather than just flowers. Other plant parts also contain fragrant compounds. The scent differs from one species to another. English lavender (Lavandula angustifolia, USDA zones 5 through 11) has a sweet smell and taste that's suited to culinary use.

When to Pick Flowers

When you start with a young plant, remove the first year's flowers before they complete development so the plant has stronger growth. In the second year, usual harvest is two to three small bunches, and by the third year you'll have abundant flower production. For use as fresh cut flowers, pick lavender flower stalks whenever enough flowers are open to look and smell good. If you're harvesting them for craft use or drying, harvest all the stems on a plant when a few flowers emerge but the rest are still in bud. This prevents flowers shedding from the dried stalks.

How to Pick Flowers

You can harvest single stems of lavender for floral arrangements with flower snips, scissors or small pruners. Cut them to the individual length needed for the particular arrangement. For mass harvesting from large plants, use a small sickle with a serrated blade. Leave a long enough stem so that when you bind the stems together for drying, the flower heads aren't too crowded together. So disease isn't transferred to the plant, sterilize pruning tool blades by wiping them off with a cloth saturated in alcohol before cutting the lavender.

Drying Lavender

Lavender bunches of about 100 stems are about the right size for drying. Fasten the stems together near their bases with a rubber band. Fashion a hanger from an unfolded paper clip so it's similar to a Christmas tree ornament hanger. One hook goes beneath the rubber band, and the other goes into a rope or chain to hang the lavender bunch upside down. Dry lavender in a dark, warm, dry area for several weeks.

Harvesting Fresh Lavender

Pick the whole flower stalk when a few flowers are open. Use them fresh to make lavender tea. For a cup of tea, pour boiling water over about three fresh flower heads and a few fresh lavender leaves, cover and let steep. Strain the tea if desired. Repeat this technique on a larger scale to make lavender infusions to flavor drinks, cakes, frostings, and other dishes. You can also use the fresh flowers and chopped leaves as a garnish or as cooking ingredients. Pick the leaves at any time.

Other Considerations

Plan which lavender to grow based on how you'll use them. Some lavender species are too strong-tasting for culinary use, such as the lavandins (Lavandula x intermedia, USDA zones 5 through 9), but they give good essential oil production. The foliage of Spanish lavender (Lavandula stoechys) has a piney fragrance unsuited for cooking, but the plant is very ornamental in the garden. When planning how much lavender to use, dried lavender is about three times as strong as fresh lavender.

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