Long Island Mammoth Dill (Anethum graveolens) is a classic non-GMO heirloom variety prized for its tall growth, aromatic foliage, and abundant seed heads. Known for its strong fragrance and reliable production, this dill variety is ideal for home gardeners looking to grow a productive, easy-to-maintain plant that thrives in warm, sunny conditions. Whether grown in raised beds, traditional gardens, or containers, Long Island Mammoth Dill delivers consistent yields of flavorful leaves and ornamental flower umbels throughout the growing season.

Features

• Tall, productive heirloom dill variety
• Aromatic foliage and abundant flower umbels
• Non-GMO seed quality
• Fast-growing and low maintenance
• Ideal for containers, garden beds, and raised beds
• Thrives in full sun and warm weather
• Produces large feathery leaves with strong aroma
• Suitable for ornamental displays and attracting pollinators

Specifications

• Common Name: Long Island Mammoth Dill
• Scientific Name: Anethum graveolens
• Plant Type: Annual
• USDA Zones: 3–11
• Season: Spring through summer
• Height: 36–60 inches
• Foliage: Feathery, aromatic green leaves
• Bloom Color: Yellow umbels
• Heirloom: Yes
• GMO Status: Non-GMO
• Organic: Not certified organic
• Light Requirements: Full sun
• Soil Preference: Well-drained, moderately rich soil
• Water Needs: Moderate
• Growth Rate: Fast
• Days to Maturity: 40–60 days for leaves; 85–100 days for seed heads
• Heat Tolerance: High
• Cold Tolerance: Low; sensitive to frost
• Plant Spacing: 12–18 inches
• Seed Longevity: 1–3 years when stored properly

Planting Guide 

• Sowing Method: Direct sow outdoors for best results.
• Seed Preparation: No pre-treatment necessary.
• When to Plant:
• After last spring frost
• Succession sow every 2–3 weeks for continuous growth
• Sowing Depth: 1/4 inch.
• Germination Time: 7–14 days.
• Light Requirements: Full sun.
• Soil Conditions: Well-drained soil; avoid heavy clay.
• Watering: Keep soil slightly moist until established.
• Maintenance:
• Thin seedlings to proper spacing
• Support tall plants in windy areas
• Harvest leaves regularly to encourage new growth