Lettuce
Green Oakleaf Lettuce.
A lobed, soft leaf grown for shape rather than for weight.
Shape is the product
Green oakleaf is a soft green leaf with the raw content of the family, grown for its lobed outline rather than for its mass. The shape is what it contributes to a mixed pack; the eating is what it shares with every other salad leaf.
A soft leaf grown for its outline has almost no margin. Lobes catch and tear where they are handled, and the edges go limp before the head does, so the feature the crop exists for is the first part of it to be lost. Every transfer between the cutting and the pack takes a share.
Distance is the sum of those transfers. A house near its pack house and its market takes them out of the chain and leaves the leaf whole at the point where it is looked at, which is the only point that matters for a type sold on shape.
Nutrition facts
Lettuce, green leaf, raw
Per 100 g
- Energy
- 15 kcal
- Fat
- 0.15 g
- Carbohydrate
- 2.87 g
- Sugars
- 0.78 g
- Fiber
- 1.3 g
- Protein
- 1.36 g
- Sodium
- 28 mg
- Potassium
- 194 mg
- Vitamin C
- 9.2 mg
Green oakleaf has a distinctively lobed leaf and an open, soft head. It is grown for leaf shape, which is what it contributes to a mixed pack or a wholehead display, rather than for mass. The softer leaf limits how far it travels well.
What the crop needs
The crop is short-cycle and hydroponic. The open head structure makes it less prone to the inner-leaf problems that affect dense types, but the soft leaf is easily damaged in harvest and packing. Handling is therefore a larger share of the grade outcome than it is for a crispy head.
What the greenhouse has to do
Oakleaf is grown for shape, and shape is easier to damage than weight. The lobed leaf catches on handling and the head does not protect itself the way a dense type does, so the harvest route, the internal transport and the pack area are laid out to move the crop with as few transfers as possible.
Cycle and uniformity do the rest. The crop turns many times a year, so density and the recirculating water system decide annual output. A soft, open leaf transpires freely, which helps at the margins but leaves the canopy sensitive to still air, so ventilation and air movement are specified for the whole floor rather than for the average.
DutchGreenhouses® designs the structure, climate, screening and irrigation around the lettuce type, its system and the local climate, so cycles turn at the head quality the market grades on. Get in touch to plan a lettuce greenhouse.
Green oakleaf lettuce, asked and answered
Is head weight or head count the right target?
Lettuce is sold by the head, so the count reaching grade in a year decides revenue. A heavier head grown more slowly can earn less than a lighter head on a shorter cycle.
Does the cultivar matter more than the type?
For head mass, density tolerance and tipburn risk, yes. Those are cultivar properties, which is why a lettuce project is planned around a named cultivar rather than around the type alone.
What causes tipburn?
Calcium not reaching the fastest-growing leaf margins, driven by transpiration and root pressure rather than by supply. Climate control addresses it; adding calcium to the solution generally does not.
Other lettuce
varieties.
Repeat harvests. Consistent head quality and size. The class you sell decides the plant load, the harvest rhythm and the house.
Butterhead Lettuce
Butterhead is the soft-leaved wholehead lettuce sold with its outer leaves intact, and the type most European buyers picture when they specify lettuce.
Green Crispy Lettuce
Green crispy is the dense, crunchy-leaved lettuce sold both as a wholehead and into processing, where the leaf holds its texture after cutting.
Lollo Bionda Lettuce
Lollo Bionda is the green Lolla lettuce, with a tightly curled leaf margin and bought for appearance rather than for weight.
Lollo Rosso Lettuce
Lollo Rosso is the red Lolla lettuce, where the tightly curled leaf margin and the red pigmentation are both the product.
Red Crispy Lettuce
Red crispy is the red-pigmented counterpart of the green crispy head, sold wholehead and into mixed-leaf packs where colour intensity is part of the specification.
Red Oakleaf Lettuce
Red oakleaf lettuce carries the lobed leaf of the oakleaf types with red pigmentation, and most often reaches the consumer inside a multi-type pack.
The greenhouse behind lettuce
Lettuce, under glass.
Table systems with floaters, Moving Gutter Systems (MGS) or Deep Water using NFT or ebb and.
Work back from head size, crop cycle and harvest handling to the growing system, spacing and climate.
Repeat harvests. Consistent head quality and size.
Table systems with floaters, Moving Gutter Systems (MGS) or Deep Water using NFT or ebb and.
Plan heads sold per cycle, grades, packing and repeat orders.
Basic Organic Greenhouse Series
Venlo glasshouses for soil-based crops. Set the crop, beds, access and production calendar before specifying the systems.
¼ acre½ acre1 acreExplore Basic
Expert Hydroponic Greenhouse Series
A defined structure for commercial hydroponics. The crop determines the growing system, climate strategy and harvest layout.
½ acre1 acre2 acresExplore Expert3,840 m²41,333 sq ft of growing space is where a lettuce plan usually starts (GrowPro Basic 1 acre). Compare all nine models
Put your next harvest
under glass.
Your crop, your site and the volume you want to sell. Let's find the greenhouse and systems to match.
Need a custom greenhouse?GrowPro Basic
We can also plan for another crop or a mixed growing programme.
Talk about your project Continue to our contact form. No commitment.Reads you might find interesting
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