Sun Gro Horticulture Sunshine

This mix is primarily designed for container gardening and greenhouse cultivation, making it excellent for transplanting and growing established plants. While it can support seeds, its structure is optimized for root development in larger pots rather than delicate germination.

RSI is a specialized additive formulated to encourage faster, more vigorous root growth. By promoting a stronger root system early on, it helps plants better absorb nutrients and water, leading to more resilient growth throughout the season.

This medium prioritizes aeration and drainage, which means it is less likely to become waterlogged. While this is great for preventing root rot, you may find that you need to water slightly more often than you would with a denser, moisture-retentive potting soil.

A 2.8 cubic foot bag is substantial and typically fills about 20 to 25 gallons of pot volume. It is a great size for filling several large patio containers or a small greenhouse bench setup.

This product is specifically engineered for container gardening and greenhouse use. It is formulated to provide the specific structure and drainage required for pots, so it is not recommended for amending large, in-ground garden beds.