HeirloomContainer OK

Lemon Balm

Melissa officinalis

Lemon Balm is a vigorous perennial herb with soft, crinkled green leaves and small white or pale pink flowers. Reaching full maturity in 70 days, this heirloom variety thrives in full sun to partial shade and adapts well to most soil types. Distinguished by its intensely aromatic foliage releasing a powerful lemon scent when brushed, Lemon Balm delivers a refreshing citrus flavor with subtle minty undertones. Its strong essential oils naturally repel common pests like aphids and spider mites, making it exceptionally pest-resistant. Ideal for teas, cocktails, desserts, and fresh culinary applications.

Harvest

70d

Days to harvest

📅

Sun

Full sun to partial shade

☀️

Zones

3–7

USDA hardiness

🗺️

Height

2-3 feet

📏

Planting Timeline

Zone:

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Start Indoors

Transplant

Harvest

Start Indoors

Transplant

Harvest

Showing dates for Lemon Balm in USDA Zone 7

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Zone Map

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Lemon Balm · Zones 3–7

What grows well in Zone 7? →

Growing Details

Difficulty

Very easy

Spacing18-24 inches

SoilAdaptable to most soils, prefers rich, moist, well-drained soil

pH6.0-7.5

Water1-2 inches per week, prefers consistent moisture

SeasonPerennial

FlavorStrong lemon scent and flavor with minty undertones, refreshing and citrusy

ColorBright to medium green

Size2-3 inch heart-shaped leaves

Zone-by-Zone Planting Calendar

Zone	Indoor Start	Transplant	Direct Sow	Harvest
Zone 3	April – May	June – July	—	July – October
Zone 4	March – April	June – July	—	July – October
Zone 5	March – April	May – June	—	June – October
Zone 6	March – April	May – June	—	June – November
Zone 7	February – March	April – June	—	June – November

Complete Growing Guide

Light: Full sun (6 or more hours of direct sunlight a day), Partial Shade (Direct sunlight only part of the day, 2-6 hours). Soil: Clay, Loam (Silt), Sand, Shallow Rocky. Soil pH: Acid (<6.0), Neutral (6.0-8.0). Drainage: Good Drainage, Occasionally Dry. Height: 2 ft. 0 in. - 3 ft. 0 in.. Spread: 1 ft. 6 in. - 3 ft. 0 in.. Spacing: 12 inches-3 feet. Growth rate: Rapid. Maintenance: Low. Propagation: Division, Root Cutting, Seed. Regions: Coastal, Mountains, Piedmont.

Harvesting

Produces many viable seeds

Type: Capsule.

Edibility: Leaves and flowers can be used for teas and flavorings of soups, stews etc.

Storage & Preservation

Fresh lemon balm leaves lose their potency quickly, so use them within 2-3 days of harvest. Store fresh stems in a glass of water like cut flowers, covering leaves loosely with a plastic bag, then refrigerate. Alternatively, wrap damp leaves in paper towels and store in the refrigerator's crisper drawer.

For drying, hang small bundles in a warm, dry, well-ventilated area away from direct sunlight. Leaves are ready when they crumble easily, usually within 5-7 days. Store dried leaves whole in airtight containers to preserve essential oils — crush just before use.

Freeze fresh leaves in ice cube trays covered with water or oil for easy portion control in cooking. For tea blends, dry leaves retain more flavor than frozen. Lemon balm also makes excellent herbal vinegar — pack fresh leaves in glass jars and cover with white wine vinegar, steeping for 2-4 weeks.

History & Origin

Origin: Southern Europe

Advantages

+Attracts: Butterflies, Pollinators
+Edible: Leaves and flowers can be used for teas and flavorings of soups, stews etc.
+Fast-growing
+Low maintenance

Companion Plants

Lemon balm's volatile oils do genuine work in a mixed planting. The scent disrupts how aphids and other soft-bodied pests locate host plants, which is why it pulls weight near tomatoes, squash, and brassicas like cabbage and broccoli — crops that draw heavy pest pressure from April onward. Planting it at 18–24 inch spacing along the bed edge gives pollinators a consistent nectar source without shading out shorter neighbors like carrots and lettuce.

Mint is the pairing that will cause you real regret. Both plants spread by underground runners, and in our zone 7 Georgia garden, mint can double its footprint in a single season — planted 12 inches from lemon balm, it will be inside the lemon balm's root zone before midsummer. Keep mint in a buried container or at least 3 feet away. Basil and parsley compete for the same moisture and soil pH band (6.0–7.5 for all three) without adding anything useful to the bed — not a disaster, just a poor use of space you could give to something that earns it.

Plant Together

Tomatoes

Lemon balm repels aphids, whiteflies, and hornworms that commonly attack tomatoes

Cabbage

Deters cabbage moths, flea beetles, and other brassica pests

Broccoli

Repels cabbage worms and attracts beneficial insects that prey on brassica pests

Squash

Helps repel squash bugs and cucumber beetles while attracting pollinators

Roses

Deters aphids and Japanese beetles, while attracting beneficial predatory insects

Carrots

Repels carrot flies and other root vegetable pests

Lettuce

Provides natural pest control against aphids and leaf miners

Beans

Attracts beneficial insects and may help deter bean beetles

Keep Apart

Mint

Both are aggressive spreaders that compete for space and resources

Basil

Can be inhibited by lemon balm's strong allelopathic compounds

Parsley

Growth may be stunted due to lemon balm's competitive nature and chemical secretions

Nutrition Facts

Calories

22kcal(1%)

Protein

0.35g(1%)

Fiber

0.3g(1%)

Carbs

6.9g(3%)

Fat

0.24g(0%)

Vitamin C

38.7mg(43%)

Vitamin A

0mcg(0%)

Vitamin K

0mcg(0%)

Iron

0.08mg(0%)

Calcium

6mg(0%)

Potassium

103mg(2%)

Per 100g serving. % Daily Value based on 2,000 calorie diet. Source: USDA FoodData Central (FDC #167747)

Pests & Disease Resistance

Resistance

Generally disease resistant, can suffer from powdery mildew in humid conditions

Common Pests

Aphids, spider mites, generally pest resistant due to strong scent

Diseases

Powdery mildew, root rot in waterlogged soil

Troubleshooting Lemon Balm

What you'll see, why it happens, and what to do about it.

White powdery coating on upper leaf surfaces, usually appearing mid-summer when nights cool down and humidity climbs

Likely Causes

Powdery mildew (Erysiphe spp.) — favored by high humidity combined with warm days and cooler nights
Overcrowded planting that chokes airflow between plants

What to Do

1.Mix 1 tablespoon baking soda plus 1 tablespoon summer horticultural oil per gallon of water and spray as a preventive every 3 to 5 days — NC State Extension's organic gardening guidance lists this as effective against powdery mildew
2.Neem oil is another option; it breaks down within 100 hours in sunlight, so reapply on the same 3-to-5-day schedule
3.Cut the plant back hard — lemon balm tolerates aggressive shearing — to remove heavily infected growth and open up the canopy

Stems collapsing at soil level, lower leaves yellowing and wilting even when soil feels wet

Likely Causes

Root rot from Pythium or Phytophthora spp. — both thrive in waterlogged, poorly drained soil
Planting in a low spot or clay-heavy bed that holds water after rain

What to Do

1.Dig up the plant, trim away blackened roots, and replant in a raised bed or a spot with at least 12 inches of amended, free-draining soil
2.Water to 1–2 inches per week total (rain included) and stop irrigating if the soil is still damp 2 inches down
3.Don't replant lemon balm in that same spot — Pythium and Phytophthora persist in the soil through the following season

Leaves stippled or bronzed, tiny webbing visible on undersides, plant looking dusty and dull in hot dry spells

Likely Causes

Two-spotted spider mites (Tetranychus urticae) — population explosions happen fast when temperatures stay above 85°F and humidity drops
Drought stress weakening the plant's natural defenses

What to Do

1.Knock mites off with a strong spray of water from the hose, targeting leaf undersides — do this in the morning so foliage dries before evening
2.Apply neem oil, which NC State Extension notes acts as both a miticide and insecticide; reapply every 3–5 days since it breaks down within 100 hours of sun exposure
3.Keep the plant at 1–2 inches of water per week — mite pressure spikes faster on drought-stressed plants than healthy ones

Frequently Asked Questions

How long does lemon balm take to grow from seed?▼

Lemon balm takes 70-80 days from seed to first harvest, with germination occurring in 10-14 days under proper conditions. You can begin harvesting small amounts when plants reach 6 inches tall (about 8 weeks), but full maturity and peak essential oil production occurs around 10-12 weeks from sowing.

Is lemon balm good for beginners?▼

Yes, lemon balm is excellent for beginning gardeners due to its forgiving nature and vigorous growth. It tolerates various soil conditions, requires minimal fertilization, and bounces back quickly from harvesting mistakes. The main challenge is controlling its spread, but this actually makes it nearly impossible to kill accidentally.

Can you grow lemon balm in containers?▼

Lemon balm grows exceptionally well in containers and is often the preferred method to prevent spreading. Use pots at least 12 inches wide and deep with good drainage. Container plants may need more frequent watering but produce the same abundant harvest as garden-grown plants while staying perfectly contained.

What does lemon balm taste like?▼

Lemon balm has a strong, sweet lemon scent with subtle minty undertones and a refreshing citrusy flavor. The taste is milder and more floral than lemon verbena, with none of the sharpness of actual lemons. Young leaves are most flavorful, while older leaves can develop a slightly bitter aftertaste.

When should I plant lemon balm seeds?▼

Start lemon balm seeds indoors 6-8 weeks before your last frost date for transplanting, or direct sow outdoors after soil temperature reaches 60°F. In most areas, this means starting indoors in February-March or direct sowing in April-May. Fall planting works in zones 7-10.

How do you stop lemon balm from spreading everywhere?▼

Contain lemon balm by growing in pots, installing underground root barriers 12 inches deep, or regularly harvesting runners that spread beyond desired areas. Remove flower heads before they set seed, and dig up volunteer seedlings promptly. Root barriers and container growing are the most effective long-term solutions.