How to Grow Large Leaf Basil
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Large Leaf Basil
Ocimum basilicum var. basilicum
herbLarge Leaf Basil is a tender annual herb prized for its substantial, fragrant foliage and mild, sweet flavor. It grows 12-24 inches tall with broad green leaves perfect for culinary use. This variety is more cold-sensitive than dwarf types but produces abundant harvests throughout the growing season.
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Example Large Leaf Basil timeline · Pittsburgh, PA (Zone 6b)
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Plant Large Leaf Basil
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Large Leaf Basil
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Large Leaf Basil dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-10; grow as annual in zones 3-4
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Seedling
7-14 daysTiny cotyledons emerge, followed by first true leaves. Plant is fragile and 1-2 inches tall.
Keep soil warm (70-75°F) and consistently moist. Provide bright light. Thin to one plant per cell if direct seeding.
Vegetative Growth
3-4 weeksRapid leaf expansion with 4-6 true leaves developing. Plant reaches 4-8 inches tall.
Pinch growing tips to encourage bushiness. Begin fertilizing with balanced fertilizer every 2-3 weeks. Maintain warm temps (65-75°F).
Establishment
3-4 weeksPlant develops substantial stem structure and multiple side shoots. Reaches 8-14 inches with dense foliage.
Continue pinching flower buds to redirect energy to leaves. Harvest outer leaves regularly to stimulate branching. Keep well-watered.
Peak Production
4-8 weeksFull-sized plant at 12-24 inches with abundant large leaves. Flowers may begin appearing at stem tips.
Harvest frequently (2-3 times weekly) to prevent flowering. Remove flower spikes immediately as they appear. Fertilize every 2 weeks.
Flowering & Senescence
Variable; onset prevents with regular harvestingSmall purple or white flowers appear in terminal spikes. Leaf flavor becomes bitter. Plant growth slows.
If flowers appear, deadhead immediately to extend leaf harvest. Once flowering dominates, plant nearing end of productive life. Plan for succession planting.
Common Pests
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Spray with water to dislodge; use insecticidal soap or neem oil. Introduce ladybugs.
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Increase humidity; spray leaves with water. Use miticide or neem oil if severe.
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Hand-pick early morning. Use pheromone traps away from plants. Apply neem oil.
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Use yellow sticky traps. Spray with insecticidal soap or neem oil weekly.
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Plant disease-resistant varieties. Ensure good drainage. Avoid overhead watering. Remove infected plants immediately.
Uses
Fresh & Cooked Dishes
CulinaryLarge leaves are ideal for pesto, pasta, pizza, salads, soups, and stir-fries. The mild, sweet flavor works with Mediterranean, Asian, and modern cuisines. Best used fresh or added at the end of cooking to preserve aroma. [source]
Herbal Remedies & Teas
MedicinalContains compounds with anti-inflammatory, antioxidant, and antibacterial properties. Traditional uses include digestion support, anti-inflammatory relief, and calming effects. Fresh or dried leaves can be brewed into tea. [source]
Essential Oil & Aromatherapy
HouseholdLeaves produce aromatic essential oil used in perfumes, soaps, and aromatherapy diffusers. The distinctive fragrance provides natural room freshening and pest-repelling properties. [source]
Herb Drying & Preservation
CraftLarge leaves dry exceptionally well for long-term storage, herb blends, and craft projects. Dried basil retains flavor for 6-12 months and is excellent for herbal arrangements and potpourri. [source]
Pollinator Support
WildlifeBasil flowers attract bees, butterflies, and other beneficial insects. If allowed to flower, it provides an excellent nectar source for pollinators during mid to late summer. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Begin harvesting when plant has 6-8 true leaves (usually 4-5 weeks from transplant). Pinch off the top 1-2 inches of stems regularly to encourage bushier growth. Harvest in morning after dew dries for best flavor and essential oil content. Remove flower buds as they appear to extend the harvest season. Can harvest up to 1/3 of plant at a time without harm. Container plants may be harvested more frequently than in-ground plants.
Fun Facts
- 🌱 Basil is believed to have originated in Central Africa and India, where it has been cultivated for over 5,000 years and holds religious significance in Hindu and Catholic traditions.
- 🌱 The name 'basil' comes from the Greek word 'basileus' meaning 'king,' earning it the title 'King of Herbs' in many culinary traditions.
- 🌱 Large Leaf Basil varieties can produce 100+ leaves per plant over a season with proper care, making them highly productive for a small footprint.
Gardening Terms
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