Ocimum basilicum ‘Mammoth’
Overview
Uses: Fresh culinary herb, pesto, salads, container gardens, patio planters, indoor herb growing
Benefits: Extra-large glossy green leaves, classic sweet basil flavor with slightly stronger intensity, vigorous warm-season growth
USDA Hardiness Zones: Annual
Sun: Full Sun
Life Cycle: Annual
Growth Habit: Upright, Mounding — branching stems with broad foliage
Bloom Color: White
Foliage Color: Bright Green
Mature Height: 18–24 inches
Mature Width: 12–18 inches
Bloom Season: Summer
Growth Rate: Fast
Summary
Mammoth Basil is valued for its exceptionally large leaves, which can reach several inches long and are well suited for pesto, fresh slicing, and salads. The broad foliage provides substantial harvest potential from a single plant.
This variety offers a familiar sweet basil flavor with slightly stronger intensity. Its upright, leafy habit makes it productive in garden beds and patio containers alike.
Small white summer flowers attract pollinators, though many gardeners pinch blooms to encourage continued leaf production.
Care
Mammoth Basil Care
Provide at least 6–8 hours of direct sunlight daily for best leaf development and flavor.
Plant in well-drained soil enriched with organic matter. Maintain evenly moist soil during active growth without allowing roots to remain saturated.
Apply a light application of slow release fertilizer at planting to support steady growth.
Pinch growing tips regularly to encourage branching and fuller plants. Removing flower buds helps extend leaf production.
Protect plants from temperatures below 55°F, as basil is sensitive to cold and will not tolerate frost.
Container Growing
Mammoth Basil performs well in containers with proper drainage. Container-grown plants require more frequent watering during warm weather.
Use high-quality potting mix and ensure full sun exposure for optimal flavor and growth.
Plants hardy in the ground may require winter protection when grown in containers in colder zones.
Size
What Size is the Mammoth Basil for Sale Online?
Plants ship in a greenhouse-grade grow pot and are actively growing at the time of shipment. Each plant is well-rooted and appropriately sized for its container. If you have specific sizing questions, please contact us for additional details.
How Large Does Mammoth Basil Grow?
Mature plants typically reach 18–24 inches tall and spread 12–18 inches wide, forming full, leafy mounds.
Additional Information
What are some common names for this plant?
This variety is commonly referred to as Mammoth Basil or Lettuce Basil.
How does Mammoth Basil differ from Genovese basil?
Mammoth Basil produces significantly larger leaves and a slightly stronger flavor compared to traditional Genovese varieties.
Where can I explore more basil varieties?
Browse our collections of Basil Plants and Herbs for additional culinary options.
Can Mammoth Basil be grown indoors?
Yes. With adequate sunlight and warmth, it performs well in indoor containers near a bright window.
