A stackable growth media filled porous fabric block-shaped container includes either an internal seed carrier to facilitate the growth of various plants from within the block, or an outer three-dimensional open structure media retention sleeve to support external growth of vegetation via hydromulching into the sleeve. A plurality of the containers may be stacked or laid side by side to create a vegetated retaining wall or a vegetated slope facing. The porous fabric block-shaped containers are filled with growth medium that encourages plant growth, while allowing proper drainage and moisture retention. The seed carrier is a degradable or porous material coated with or supporting seeds and other amendments which facilitate plant growth. The open structure media retention sleeve includes loops of filaments to increase friction between blocks and to hold hydromulch on exposed surfaces.