Red oakleaf combines the lobed leaf shape of the oakleaf types with red pigmentation. It most often reaches the consumer as one component of a multi-type pack rather than as a wholehead on its own, which changes what the grower is optimising for.
What the crop needs
The crop is short-cycle and hydroponic, with the open head structure of the oakleaf types and the light-driven colour development of the red types. Because it is frequently sold in a set, head size consistency with the other components matters as much as the absolute size.
What the greenhouse has to do
Red oakleaf is usually sold as part of a set rather than on its own, and that changes what the house is being asked for. A trio or a mixed pack needs its components ready together, so planting schedule and compartment planning are built around the pack date, not around each type’s own fastest cycle.
Colour and shape are both the product, and both are fragile. Pigment follows light, so the light plan and the screening strategy are specified for colour as well as growth; the lobed leaf damages easily, so the harvest route is kept short. Even transmission across the floor is what keeps a batch matching itself inside the pack.
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.
Other lettuce varieties and the systems behind them
Butterhead lettuce
Soft, loosely wrapped leaves, and the type least tolerant of handling.
Greenleaf / Batavia lettuce
A firmer, more robust head than butterhead, and it travels better.
Romaine lettuce
The upright head, and the tipburn risk that comes with it.
Hydroponics
Substrate growing with drip supply and drain recirculation.
Climate
Heating, cooling, humidity control and carbon dioxide dosing.
A pack ages with its weakest leaf
Red oakleaf is the red leaf of the family in a lobed, open head, eaten raw like the rest and bought for what it adds to a set. Its pigment and its shape are both part of what the pack is paying for, and both are read by eye before anything is tasted.
A mixed pack is only as fresh as its poorest component. The red types dull first and the lobed leaf tires first, so a set assembled at the end of a long chain is usually let down by exactly this leaf. Nothing else in the pack makes up for what one part of it has already lost.
That is an argument for growing the components close to where they are packed. A short run from the house to the pack line keeps the set matched at the moment it is closed, and leaves the shelf days to the buyer rather than spending them behind the scenes.
Nutrition facts
Lettuce, red leaf, raw
Per 100 g
- Energy
- 13 kcal
- Fat
- 0.22 g
- Carbohydrate
- 2.26 g
- Sugars
- 0.48 g
- Fiber
- 0.9 g
- Protein
- 1.33 g
- Sodium
- 25 mg
- Potassium
- 187 mg
- Vitamin C
- 3.7 mg
Red 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.
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