Substrate intended to serve as cultivation support, characterised: on the one hand, in that it comprises: - a first part, forming the skeleton of the substrate and representing more than 70% of the total volume of said substrate, composed of particles P >100μm of a granulometry greater than 100 μm, the totality of said particles being formed from hard particles P D>100 and resilient particles P R>100μm; - a second part of corpuscular elements P <100 of a granulometry less than 100 μm, and forming from 0 to 450 g/l of said substrate; - a third part, forming from 0 to 200 g/l of said substrate, composed of fine fibres of a length between 3 mm and 100 mm and of a diameter between 5 μm and 35 μm; - a fourth part, forming from 0 to 200 g/l of said substrate, composed of other elongated and/or surface inclusions, each of these elongated or surface inclusions having at least one of its dimensions considerably greater than the granulometry of the particles of the first part, and on the other hand, in that: (i) either said resilient particles have a volume proportion PV between 5% and 60% by volume of this first part and the sum of the dosage D F of fine fibres of the third part and of the dosage D AI of all the other inclusions of the fourth part is between 2 g/litre and 80 g/litre of substrate; (ii) or said resilient particles have a volume proportion PV between 60% and 90% by volume of this first part and the sum of the dosage D F of fine fibres of the third part and of the dosage D AI of all the other inclusions of the fourth part is between 7 g/litre of substrate and 40 g/litre of substrate. on the one hand, in that it comprises: - a first part, forming the skeleton of the substrate and representing more than 70% of the total volume of said substrate, composed of particles P >100μm of a granulometry greater than 100 μm, the totality of said particles being formed from hard particles P D>100 and resilient particles P R>100μm; - a second part of corpuscular elements P <100 of a granulometry less than 100 μm, and forming from 0 to 450 g/l of said substrate; - a third part, forming from 0 to 200 g/l of said substrate, composed of fine fibres of a length between 3 mm and 100 mm and of a diameter between 5 μm and 35 μm; - a fourth part, forming from 0 to 200 g/l of said substrate, composed of other elongated and/or surface inclusions, each of these elongated or surface inclusions having at least one of its dimensions considerably greater than the granulometry of the particles of the first part, and - a first part, forming the skeleton of the substrate and representing more than 70% of the total volume of said substrate, composed of particles P >100μm of a granulometry greater than 100 μm, the totality of said particles being formed from hard particles P D>100 and resilient particles P R>100μm; - a second part of corpuscular elements P <100 of a granulometry less than 100 μm, and forming from 0 to 450 g/l of said substrate; - a third part, forming from 0 to 200 g/l of said substrate, composed of fine fibres of a length between 3 mm and 100 mm and of a diameter between 5 μm and 35 μm; - a fourth part, forming from 0 to 200 g/l of said substrate, composed of other elongated and/or surface inclusions, each of these elongated or surface inclusions having at least one of its dimensions considerably greater than the granulometry of the particles of the first part, and on the other hand, in that: (i) either said resilient particles have a volume proportion PV between 5% and 60% by volume of this first part and the sum of the dosage D F of fine fibres of the third part and of the dosage D AI of all the other inclusions of the fourth part is between 2 g/litre and 80 g/litre of substrate; (ii) or said resilient particles have a volume proportion PV between 60% and 90% by volume of this first part and the sum of the dosage D F of fine fibres of the third part and of the dosage D AI of all the other inclusions of the fourth part is between 7 g/litre of substrate and 40 g/litre of substrate. (i) either said resilient particles have a volume proportion PV between 5% and 60% by volume of this first part and the sum of the dosage D F of fine fibres of the third part and of the dosage D AI of all the other inclusions of the fourth part is between 2 g/litre and 80 g/litre of substrate; (ii) or said resilient particles have a volume proportion PV between 60% and 90% by volume of this first part and the sum of the dosage D F of fine fibres of the third part and of the dosage D AI of all the other inclusions of the fourth part is between 7 g/litre of substrate and 40 g/litre of substrate.