Reseeding at the end of the season offers several advantages over a spring reseed, according to John Spence, forage crops product manager with Limagrain UK.
He says: "Yield and quality analysis results from first cut silage can inform reseeding decisions, identifying those fields which are not performing as well.
"Reseeding in autumn has become more popular across all parts of the country, possibly in response to the drier springs we have experienced some years.
"There is generally less pressure on grass in late summer, so it is easier to take ground out of production.
Furthermore, lack of soil moisture is less likely to be an issue later in the year. "It is important not to leave reseeding too late.
In the lowlands, when reseeding ryegrass swards with no clover, mid-August up until mid-September is optimal.
For swards containing white clover, seed should be drilled by mid to late August.
"For mixtures including red clover, the end of July or at the latest, early August should be the aim.
In the uplands and further north, these dates should be brought forward by about two weeks.
"This is because clovers need warmer temperatures to germinate successfully. An earlier seeding date will enable good establishment before winter to reduce the risk of frost damage and to allow for the control of problem weeds before fields become too wet."
Deficiency
Mr Spence advises having soil tested so any nutrient deficiency or pH issues can be resolved prior to drilling a new ley.
He says: "A reseed following full cultivation is likely to give the best results, but any method giving good soil to seed contact will work well.
"The seed should be drilled to a maximum depth of 6mm and rolling afterwards is strongly recommended.
"Choosing the right mixture which offers the desired balance between longevity and production is important. Limagrain mixtures are all formulated with forage quality in mind so will deliver excellent yields with high feed value."
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