A substrate intended to act as a culture support comprising: a first part, making up the backbone of the substrate and representing more than 70% of the total volume of said substrate, composed of particles P with a particle size greater than 100 µm, said particles as a whole consisting of hard particles Pand/or of resilient particles P wherein said resilient particles make up a proportion by volume PV of between 0% and 100% by volume of this first part a second part of corpuscular components P with a particle size of less than 100 µm, and making up from 0 to 450 g/l of said substrate a third part, making up from 0 to 200 g/l of said substrate, composed of fine fibres that are between 3 mm and 100 mm in length and between 5 µm and 35 µm in diameter a fourth part, making up from 0 to 200 g/l of said substrate, composed of other elongated and/or surface inclusions, at least one of the dimensions of each of these elongated or surface inclusions being much greater than the particle size of the particles of the first part, wherein the sum of the amounts of the third part and of the fourth part are greater than 3 g/l of said substrate. Use for preparing in particular turfed sport surfaces and building terraces.
