SuNutri
SuNutri
Lemon Balm
Beginner

Lemon Balm

Melissa officinalis

Family: Lamiaceae

Lemon Balm is a delightfully fragrant perennial herb with bright lemon-scented leaves used for centuries to calm nerves, improve mood, and add refreshing flavor to teas and dishes. This hardy, low-maintenance plant spreads readily and produces abundant harvests of aromatic foliage.

Days to Harvest

70-90 days

Sun Needs

Full Sun to Partial Shade (4-8 hours)

Water Needs

moderate

Germination Temp

70°F optimal

Seed Starting

Start Indoors

6 weeks before last frost

Germination

7-14 days

Seed Depth

1/8 inch

Light to Germinate

Yes

đź’ˇ Tip: Seeds need light to germinate. Press lightly into soil surface without covering deeply. Keep consistently moist but not waterlogged. Germination can be slow and erratic.

Growing Conditions

Soil Type

Average, well-draining soil. Tolerates poor soil.

pH Range

6 - 7.5

Spacing

18-24 inches between plants (spreads readily)

Companion Plants
âś“ Tomatoesâś“ Squashâś“ Brassicasâś“ Fruit trees (attracts pollinators)

⚠️ Avoid planting near:

âś— Mint (competes aggressively)âś— Other spreading herbs in same bed
History & Nutrition

History

Melissa officinalis, known as lemon balm, has been cultivated for over 2,000 years, with its name "Melissa" deriving from the Greek word for "honeybee," reflecting the plant's remarkable ability to attract pollinators. Ancient Greeks and Romans revered lemon balm for its medicinal properties, with the physician Dioscorides prescribing it for scorpion stings and venomous bites around 50 CE, while Pliny the Elder recommended it for stopping bleeding. The plant gained particular fame in medieval Europe, where it became a cornerstone of monastic medicine gardens. Paracelsus, the influential 16th-century Swiss physician, called lemon balm the "elixir of life," believing it could completely revive the human spirit and even promote longevity. Carmelite nuns in France created "Carmelite Water" (Eau de Mélisse) in the 14th century, a lemon balm-based tonic mixed with lemon peel, nutmeg, coriander, and angelica root, which became wildly popular as a remedy for headaches, nervous disorders, and neuralgia—the formula is still produced today. During the Middle Ages, lemon balm was used to lift spirits during times of melancholy, with the 17th-century herbalist John Evelyn writing that lemon balm "sovereign for the brain, strengthening the memory and powerfully chasing away melancholy." The herb was so valued that colonists brought it to North America, where it naturalized widely. Modern research has validated many traditional uses, with studies confirming lemon balm's ability to reduce anxiety, improve cognitive function, support sleep, and combat the herpes simplex virus. The essential oil, rich in citronellal and citral, is now used in aromatherapy worldwide, while lemon balm tea remains one of the most popular herbal infusions for relaxation and mental clarity.

Nutritional Benefits

  • âś“Rich in rosmarinic acid, a powerful antioxidant
  • âś“Contains caffeic acid and other polyphenols
  • âś“Good source of eugenol with antimicrobial properties
Climate & Temperature

Optimal Growing Temp

60°F - 75°F

Lemon balm grows well in moderate temperatures. Tolerates heat and cold once established.

Survival Range

30°F - 85°F

Can survive these temperatures

hardy
cool Season

Frost Note: Hardy to zone 4-5. Dies back in winter but regrows reliably from roots. Very easy to grow.

Best USDA Zones

Zone 4Zone 5Zone 6Zone 7Zone 8Zone 9

Humidity

40-60%

Tolerates a wide range. Good air circulation prevents disease.

Plant Size & Growth

Height

18-24 inches

Spread

18-24 inches

Growth Habit

clumping

perennialRoot Depth: Moderate fibrous roots (8-12 inches). Spreads readily by self-sowing.
Growth Stages

Germination

10-14 days

Easy germination. Seeds need light—do not cover.

Seedling Stage

Duration: 4-6 weeks

True leaves: Heart-shaped, crinkled leaves with strong lemon scent.

Transplant ready: When 4-5 inches tall (8-10 weeks from seed).

Vegetative Growth

Duration: Spring through fall

Vigorous, bushy growth. Harvest leaves anytime. Pinch flowers to prolong leaf production.

Flowering

Timing: Mid-summer

Duration: 3-4 weeks

Small white flowers attractive to bees. Self-sows prolifically if allowed to set seed.

Harvest Maturity

Timing: 70-85 days from seed

  • Bushy, full growth
  • Strong lemon aroma
  • Ready to flower
Expected Yield

Per Plant

2-4 cups fresh leaves per plant over the season.

Per Square Foot

1-2 plants per square foot

Harvest Frequency

Harvest sprigs continuously. Cut up to half the plant at once.

Factors Affecting Yield

  • •Regular harvest
  • •Cool weather for best flavor
  • •Removing flowers extends leaf production
Watering Guide

Seedling Stage

Keep consistently moist.

Established Plants

Water when top inch dry. Every 3-5 days.

During Fruiting

Moderate water during flowering.

Preferred Method

Water at soil level. Tolerates more moisture than Mediterranean herbs.

Pro Tips

  • Prefers consistent moisture
  • More forgiving than Mediterranean herbs
Fertilizing Guide
moderate feederRecommended: Balanced 10-10-10

Feeding Schedule

Spring

Compost

Once

Growing

Liquid fertilizer

Monthly

Organic Options

CompostFish emulsionCompost tea

Regular light feeding supports continuous harvest.

Container Growing
âś“ Suitable for containers

Minimum Size

10 inch pot

Recommended Size

12-14 inch pot

Depth Required

At least 10-12 inches

Best Varieties for Containers

All Gold (yellow leaves)QuedlinburgerCompacta

Container Tips

  • Grows well in containers
  • Contain spreading habit
  • Keep moist but well-drained
  • Bring indoors for winter harvest
Frequently Asked Questions

Related Plants