Muir Greenleaf Lettuce (Batavia) Pelleted Seed – Product Highlight
by Paramount Seeds on Jul 27 2026
Muir: A Reliable Greenleaf for Greenhouse & Field
Muir is our most popular batavia-type greenleaf lettuce. Bred for consistent performance across both field and unheated greenhouse production. With its upright habit, well-filled hearts, and sweet flavor, Muir is a grower favorite for good reason. Not sure which lettuce variety is right for your operation? See our guide to choosing your first lettuce varieties.
Key Characteristics
- Type: Batavia Greenleaf
- Size: Medium, light green, open habit
- Growth: Upright heads with well-filled hearts
- Flavor: Sweet, mild
- Bolting resistance: Strong
- Tipburn resistance: Strong against internal tipburn — see our guide on controlling tipburn in hydroponic lettuce for management strategies.
Disease & Pest Resistance
Muir carries excellent resistance to downy mildew (Bl: 16–26, 28, 32EU / 1–8US), as well as resistance to Nr:0 and TBSV. It also demonstrates strong aphid resistance — a significant advantage for growers managing pest pressure without heavy chemical inputs. For help reading resistance codes, see our guide to understanding HR and IR disease resistance. For a broader reference on lettuce diseases to watch for, see our lettuce disease identification guide.
Production Environments
Suited for both field production and unheated greenhouse growing. Its slow-bolting nature and tipburn tolerance make it a dependable choice across a range of seasonal conditions. See our growing media guide for substrate options suited to batavia production.
Pelleted Seed Advantage
Available in pelleted format for precision seeding — ideal for transplant trays, direct seeding into rockwool, or automated seeding lines. Seed from this supplier is untreated as standard.