A seeder comprising a plurality of seeding elements , each seeding element comprising metering and transport means, controlling the seed flow rate at the outlet of a hopper and delivering said seeds into a transfer duct to supply means for planting said seeds, each seeding element also comprising a control device mounted between said metering and transport means and said planting means, close to these, said control device comprising a reserve space , supplied with seeds via a supply inlet connected to said metering and transport means via an upstream portion of said transfer duct, said control device comprising a wheel capable of collecting seeds one-by-one from said reserve space , by means of at least one row of teeth forming buckets, each ensuring collecting of one seed from said reserve space and the release of said seed into a downstream portion of said transfer duct, and also comprising retaining means delaying said release of each seed, a portion of which extends substantially tangentially to said wheel and is flexible, so as to match with at least two radii centred on the axis of rotation: - a radius R1 defined by the tip of said teeth, i.e. the portion of said wheel farthest from said axis of rotation; and - at least one radius R2, smaller than said radius R1, characterised in that said retaining means comprise at least one first brush comprising an assembly of bristles, at least one free portion of said bristles extending substantially tangentially and substantially vertically to the wheel and matching with said two radii R1 and R2. each seeding element comprising metering and transport means, controlling the seed flow rate at the outlet of a hopper and delivering said seeds into a transfer duct to supply means for planting said seeds, each seeding element also comprising a control device mounted between said metering and transport means and said planting means, close to these, said control device comprising a reserve space , supplied with seeds via a supply inlet connected to said metering and transport means via an upstream portion of said transfer duct, said control device comprising a wheel capable of collecting seeds one-by-one from said reserve space , by means of at least one row of teeth forming buckets, each ensuring collecting of one seed from said reserve space and the release of said seed into a downstream portion of said transfer duct, and also comprising retaining means delaying said release of each seed, a portion of which extends substantially tangentially to said wheel and is flexible, so as to match with at least two radii centred on the axis of rotation: - a radius R1 defined by the tip of said teeth, i.e. the portion of said wheel farthest from said axis of rotation; and - at least one radius R2, smaller than said radius R1, - a radius R1 defined by the tip of said teeth, i.e. the portion of said wheel farthest from said axis of rotation; and - at least one radius R2, smaller than said radius R1, characterised in that said retaining means comprise at least one first brush comprising an assembly of bristles, at least one free portion of said bristles extending substantially tangentially and substantially vertically to the wheel and matching with said two radii R1 and R2. <EOS>