Substrate for use as a culture support comprising: a first part constituting the backbone of the substrate and representing more than 70% of the total volume of said substrate, composed of particles P>； 100 μm with a particle size greater than 100 μm, all of said particles consisting of hard particles PD>； 100 and / or of resilient particles PR>； 100, said resilient particles constituting a volume proportion PV between 0% and 100% by volume of this first part； a second portion of P <；100 corpuscular elements with a particle size less than 100 microns, and constituting from 0 to 450 g / l of said substrate； a third part constituting from 0 to 200 g / l of said substrate, composed of fine fibers with a length of between 3 mm and 100 mm and a diameter of between 5 μm and 35 μm； a fourth part constituting from 0 to 200 g / l of said substrate, composed of other elongate and / or surface inclusions, each of these elongate or surface inclusions having at least one of their dimensions much greater than the particle size of the particles of the first partly, the sum of the dosages of the third part and the fourth part being greater than 3 g / l of said substrate. Application to the realization of turf sports surfaces and terraces of buildings.Substrat destiné à servir de support de culture comprenant : une première partie, constituant le squelette du substrat et représentant plus de 70 % du volume total dudit substrat, composée de particules P>；100µm d'une granulométrie supérieure à 100 µm, l'ensemble desdites particules étant constitué de particules dures PD>；100 et/ou de particules résilientes PR>；l00, lesdites particules résilientes constituant une proportion volumique PV comprise entre 0% et 100% en volume de cette première partie； une deuxième partie d'éléments corpusculaires P<；100 d'une granulométrie inférieure à 100 µm, et constituant de 0 à 450 g/l dudit substrat； une troisième partie, constituant de 0 à 200 g/l dudit substrat, composée de fibres fi
