Large Medium-Green Butterhead Specialty Lettuce for All-Season Production
Large Butterhead Type: Produces substantial, well-closed heads with thick, supple, medium-green leaves.
All-Season Versatility: Highly adaptable variety performing consistently across warm and cool planting cycles (30–55 days maturity).
Exceptional Uniformity & Vigor: Delivers reliable crop stand and high marketable yields in both open-field and hydroponic setups.
Superior Field Holding: High bolting tolerance prevents early flowering and maintains leaf quality under rising temperatures.
Comprehensive Resistance Package: High resistance (HR) to Downy Mildew (Bl: 29–41 EU) and Lettuce Aphid (Nr:0), with intermediate resistance (IR) to Lettuce Mosaic Virus (LMV:1).
A large butterhead specialty lettuce suited to open-field and hydroponic commercial production for the fresh pre-pack and processing markets.
Fast- to medium-maturing variety, taking 30 – 55 days from transplant to harvest depending on seasonal temperatures and target head size.
Vigorous, uniform growth habit with a large closed-head frame and thick, medium-green leaves offering excellent field holding and strong bolting tolerance.
Recommended planting densities depend on the production system and intended harvest size:
Open-Field Production: 60,000 – 80,000 plants per hectare.
Hydroponic / NFT Systems: 20 – 25 cm plant spacing within standard commercial channels.
Petrian delivers high marketable yield potential with a high percentage of first-grade heads. Features thick, durable leaves that withstand processing and transport, with a neat base for quick trimming.
High Resistance (HR): Downy Mildew (Bremia lactucae Bl: 29–41 EU), Lettuce Aphid (Nasonovia ribisnigri Nr:0).
Intermediate Resistance (IR): Lettuce Mosaic Virus (LMV:1).