Growing Lemon Balm

Lemon balm (Melissa officinalis) is one of the most cheerful herbs in the garden — fragrant, generous, easy, and deeply calming. A member of the mint family, it has been used for centuries to ease anxiety, improve sleep, calm digestive upset, and as an antiviral (particularly effective against cold sores caused by the herpes simplex virus). One plant becomes many quickly. Give it a home and it will give back abundantly.

Method

1. Sow lemon balm seeds indoors 6–8 weeks before last frost. Seeds need light to germinate — press them onto the surface of moist seed-starting mix and do not cover. Keep consistently moist at 65–70°F.
2. Transplant outdoors after last frost, spacing plants 18–24 inches apart. Lemon balm spreads via underground runners — plant in a generous spot or contain it in a raised bed.
3. It tolerates a wide range of conditions: full sun to partial shade, most soil types. In hot climates, afternoon shade extends the harvest season before it bolts.
4. Begin harvesting leaves once the plant is well-established — usually 8–10 weeks after transplant. Harvest in the morning before the heat drives off volatile oils.
5. Cut stems back by half when the plant begins to flower (bolting). This redirects energy to leaf production and extends the harvest significantly.
6. Preserve by drying quickly in small bundles hung in a warm, dark space, or by freezing in olive oil in ice cube trays.
7. Divide established clumps every 2–3 years in spring to rejuvenate the plant and expand your patch.

Tips & Notes

• Fresh lemon balm is significantly more potent than dried. Make lemon balm tincture with fresh leaves for the strongest antiviral preparation.
• A simple lemon balm glycerite (leaves steeped in vegetable glycerin for 4 weeks) is wonderful for children — calming, sweet, and effective for anxiety and sleep.
• Rub fresh leaves directly on cold sores at the first tingle. The antiviral compounds work best topically before a blister forms.
• Lemon balm + chamomile + lavender is my go-to sleep blend. Equal parts of each, dried, 1 tablespoon per cup, steeped 10 minutes.

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