Cereals 2026: Benefits of OSR and linseed in the rotation
While many see it as a choice between oilseed rape or winter linseed, one expert argues there is much to be gained by growing both within a rotation.
Nigel Padbury, seeds and marketing manager at Premium Crops, says that as confidence in oilseed rape returns, arable farmers face the dilemma of how to maximise the benefits of a proven break crop while managing the risks that drove so many away from OSR in the first place – with some opting for winter linseed instead.
See also: UK oilseed rape crop: Why there’s growing optimism in 2026-27
Current prices of £485–500/t, combined with the strong demand for OSR linked to the biofuels market, make OSR a compelling commercial case.
The OSR coverage area is predicted to rise from 280,000-300,000ha for harvest 2026 to as much as 320,000-340,000ha for harvest 2027.
But the problems that once eroded the confidence in OSR have not totally disappeared, warns Nigel. Verticillium, light leaf spot, slugs and, critically, CSFB are all still present.
They have simply become less visible while the OSR acreage has been low. If growers drift back into rotations of the past, every one of those challenges could return with force.
“OSR works best as part of a genuinely diverse rotation, mixed with other break crops,” says Nigel. “We believe the temptation to drift back into a one-in-three wheat-rape rotation should be avoided.”
Winter linseed offers a practical solution to the rotation problem. Rather than replacing OSR, it extends the gap between OSR crops, moving from a three- or four-year rotation to a seven- or eight-year cycle.
Wider rotations
Nigel says in a typical pattern, this might look like OSR, first wheat, a second wheat or winter barley, winter linseed, wheat and/or barley again, then back to OSR.
“The result is a wider rotation that delivers many of the same break crop benefits while spreading risk across two distinct markets and crop types.”
One of the most compelling reasons to include winter linseed in any OSR rotation is its relationship – or rather, its lack of one – with flea beetle.
As a non-host of any flea beetle, linseed removes one of the most costly and unpredictable risks.
Where OSR was once grown year after year at 700,000ha, the removal of neonicotinoid seed treatments left crops entirely exposed.
Extending the rotation with linseed creates a genuine break in the flea beetle cycle, reducing pressure on the subsequent OSR crop.
© Gary Naylor
There is a slug benefit too. Once an established winter linseed crop is in the ground, slugs tend to migrate away, leaving measurably less pressure on the following wheat.
Growers have reported applying as little as a quarter of their usual slug control after linseed compared with after OSR – a significant saving in both cost and time.
With ammonium nitrate trading at up to £531/t and showing little sign of falling, the nitrogen requirement of any break crop matters more than ever.
OSR demands 180-250kg N/ha for a strong yield. Winter linseed, by contrast, requires just 80-120kg N/ha – roughly half the amount. At current prices, that difference can add close to £200/ha to OSR input costs.
“That’s the equivalent of needing to grow an extra 0.5t/ha just to break even on fertiliser costs alone,” says Nigel.
By alternating between OSR and linseed in the rotation, growers can balance the high-input, high-reward profile of OSR with the leaner, but just as profitable, cost structure of linseed.
Effect on cashflow
This smooths out overall cashflow and reduces exposure to nitrogen price spikes driven by geopolitical events beyond any farmer’s control.
Although the link between OSR prices and biofuels demand currently works in growers’ favour, it can turn quickly with global events.
Linseed prices, by contrast, track a more consistent line, anchored to steady demand from human food, animal feed and industrial sectors.
Growing both within the same rotation means selling into two separate markets, reducing the impact if one turns against the grower.
Winter linseed also adds agronomic value beyond pest and disease management.
Its fibrous root structure improves soil structure, and it forms relationships with mycorrhizal fungi that persist into the following wheat crop.
YEN trial data points to a 1.1 t/ha yield uplift in first wheat following any break.
Its flexible sowing window – open until the end of September – also allows more time to establish proper stale seed-beds before winter wheat drilling.
In short, Nigel concludes that winter linseed and OSR are not competitors for a place in the rotation. They are partners, each making the other more viable, more profitable and more resilient.
