Choosing the best establishment method for EFA green cover
This year, many mixed farms will be introducing Ecological Focus Areas (EFAs) for the first time.听EFA green cover (EFAGC) is one of 11听Ecological Focus Area (EFA) options available. Green cover is the establishment of a temporary crop in the autumn, enhancing biodiversity and improving soil structure and fertility, as well as preventing soil erosion and nutrient leaching. It can be grazed however sufficient vegetation must remain to听maintain听continuous ground cover until 31 December.听听
EFA Green Cover听requires听to be听established听by 1 November and听maintained听until 31 December.听You must establish a green cover consisting of two or more of the following crops,听alfalfa, barley, alsike clover,听balansa听clover, crimson clover, red clover,听persian听clover, white clover, buckwheat (can cause skin Photosensitisation), mustard, oats, phacelia, radish, rye, triticale, vetch, kale, forage rape, stubble turnip, beans.听听
Earliness of鈥痵owing is key, giving the crop longer to听establish听and grow before winter. An听additional听week can make a noticeable difference to establishment and biomass production during the autumn. If you are later than the first week in鈥疭eptember,鈥痚nsure your predominant species鈥痠s a large鈥痵eed which has the supply of energy to get the plant鈥痺ell established. With a听relatively short听establishment window, particularly following spring crops, choosing the right establishment method is important to producing a successful green cover.鈥��听
The three most common establishment methods are broadcasting, direct听drilling听and conventional cultivation.听Cover crops can be broadcast into standing crops, prior to harvest.听Seed can also be broadcast after harvest using a quad bike-mounted spinner before the straw is baled. Establishing the crop at these earlier stages gives it more time to germinate and grow before winter, while also helping to spread the workload during a busy harvest period. However,听soil moisture is a limiting鈥痜actor, as听successful establishment relies on adequate soil moisture, as the seed is not incorporated into the soil.听听
The early harvest in 2025鈥痯rovided an ideal opportunity for establishment; however, for some growers, dry ground and a lack of rainfall meant this opportunity did not鈥痬aterialise. With听Scotland experiencing heat wave conditions again recently, soil moisture is likely to听determine听establishment methods.听听听听
Direct drilling is carried out after harvest, placing the seed directly into the stubble with minimal soil disturbance. This method provides good seed-to-soil contact while conserving soil moisture and protecting soil structure.听听
Conventional cultivation involves preparing a seedbed through heavier cultivations, such as ploughing or discing, before drilling the crop.听While this is听the听most reliable establishment听method听it听requires more labour,听machinery听and fuel than the other methods.听
Establishment cost is another听important factor听when choosing the most听appropriate method.听You鈥痟ave seed,鈥痗ultivation鈥痑nd听possible鈥痜ertiliser鈥痗osts鈥痶o consider.听Contractor charges in the 2025/26 Farm Management Handbook show that broadcasting is听generally the听lowest-cost听option, at around听拢35.83/丑补. Direct drilling is more expensive, averaging听拢66.54/丑补, while conventional cultivation is typically the highest-cost听option. A conventional cultivation system involving ploughing (拢76.63/ha), discing (拢50.58/ha) and drilling (拢66.54/丑补) brings the total establishment cost to approximately听拢193.75/丑补. Although conventional cultivation often provides the most reliable establishment, the听additional听machinery,听labour听and fuel costs mean it may not always be the most economical choice where soil and weather conditions are suitable for lower-cost establishment methods.听
Each establishment method offers different benefits and challenges, and there is no single approach that suits every system. Although broadcasting is听generally the听lowest-cost听option, direct drilling and conventional cultivation often provide more reliable establishment due to improved seed-to-soil contact, particularly where soil moisture is limited or larger-seeded species are included in the mix.听听
Planning is key for successful establishment听and ensuring that听EFA requirements are met.听听
Five top tips for听successful EFA听green听cover听establishment听
- Establish as early as possible听to maximise root growth, biomass听production听and soil benefits before winter.听
- Choose the right establishment method听that best suits听timeliness of听harvest,听soil conditions,听machinery听and labour availability.听
- Match the sowing method to the seed size听for the best seed to ground contact and establishment.听
- Monitor weather and soil conditions听to encourage rapid germination and successful establishment.听Be prepared to change seed mixtures if establishment is delayed.听听
- Focus on听establishing听a productive green cover听making sure the鈥痵pecies in the mix are鈥痑ppropriate for鈥疭cottish鈥痝rowing鈥痗onditions to听deliver the greatest soil and environmental benefits.听
Erin McGuire, Consultant,听Erin.Mcguire@sac.co.uk
Posted by SAC Consulting on 21/07/2026
