A tray comprising: an upper portion, a lower portion, and a backing layer connected between the upper portion and the lower portion; the lower portion comprising: a plurality of reservoirs positioned spaced across below the backing layer wherein each reservoir comprises an opening defined through the backing layer and a base having a through hole that allows water to pass through and a plurality of protrusions adjacent to the through hole for contacting with a support surface on which the tray is installed leaving a gap between the through hole and the support surface; the upper portion comprising: a sidewall extending upwards from a peripheral edge of the backing layer to form a cavity for containing material wherein the sidewall has a height that defines the capacity of the cavity; a plurality of dividers extending upward from the backing layer to divide the backing layer into a plurality of partitions within the cavity with each partition encompasses a certain number of the reservoirs wherein each divider having a height lower than the height of the sidewall such that two layers of material can be formed in the upper portion with a first layer formed within the partitions and a second layer formed over the first layer up to a top end of the sidewall, a plurality of securing units formed at an inner surface of the sidewall and configured to secure the material in the cavity to the sidewall such that the material is prevented from separating from the inner surface of the sidewall; a plurality of interlocking units formed at an outer surface of the sidewall and configured to interlock the tray with another tray so that a modular structure having multiple of the trays securely interlocked by the interlocking units can be formed; multi-directional water passageways formed underside the tray which are spaces defined by the backing layer, the reservoirs and the support surface on which the tray is installed. an upper portion, a lower portion, and a backing layer connected between the upper portion and the lower portion; the lower portion comprising: a plurality of reservoirs positioned spaced across below the backing layer wherein each reservoir comprises an opening defined through the backing layer and a base having a through hole that allows water to pass through and a plurality of protrusions adjacent to the through hole for contacting with a support surface on which the tray is installed leaving a gap between the through hole and the support surface; the upper portion comprising: a sidewall extending upwards from a peripheral edge of the backing layer to form a cavity for containing material wherein the sidewall has a height that defines the capacity of the cavity; a plurality of dividers extending upward from the backing layer to divide the backing layer into a plurality of partitions within the cavity with each partition encompasses a certain number of the reservoirs wherein each divider having a height lower than the height of the sidewall such that two layers of material can be formed in the upper portion with a first layer formed within the partitions and a second layer formed over the first layer up to a top end of the sidewall, a plurality of securing units formed at an inner surface of the sidewall and configured to secure the material in the cavity to the sidewall such that the material is prevented from separating from the inner surface of the sidewall; a sidewall extending upwards from a peripheral edge of the backing layer to form a cavity for containing material wherein the sidewall has a height that defines the capacity of the cavity; a plurality of dividers extending upward from the backing layer to divide the backing layer into a plurality of partitions within the cavity with each partition encompasses a certain number of the reservoirs wherein each divider having a height lower than the height of the sidewall such that two layers of material can be formed in the upper portion with a first layer formed within the partitions and a second layer formed over the first layer up to a top end of the sidewall, a plurality of securing units formed at an inner surface of the sidewall and configured to secure the material in the cavity to the sidewall such that the material is prevented from separating from the inner surface of the sidewall; a plurality of interlocking units formed at an outer surface of the sidewall and configured to interlock the tray with another tray so that a modular structure having multiple of the trays securely interlocked by the interlocking units can be formed; multi-directional water passageways formed underside the tray which are spaces defined by the backing layer, the reservoirs and the support surface on which the tray is installed.