Sun Gro Black Gold Houseplant Orchid Potting Mix

This blend is specifically formulated for terrestrial and semi-terrestrial orchids, such as cymbidiums. If you are growing epiphytic orchids that require a coarser, bark-heavy medium, you may need to supplement this mix with extra bark or charcoal.

These ingredients are essential for creating a porous structure. They ensure excellent drainage and airflow around the roots, which is critical for preventing root rot in orchids that prefer to dry out slightly between waterings.

This mix is designed primarily for structure and drainage rather than nutrition. While it contains organic ingredients, you should plan to use a balanced orchid fertilizer according to your specific plant's feeding schedule.

Orchids generally thrive when repotted every 18 to 24 months, or whenever the potting medium begins to break down and lose its structure. You will know it is time to repot when the mix no longer drains freely or the plant appears stunted.

The dolomite lime is included to stabilize the pH within the potting medium itself, creating a consistent environment for root health. It does not significantly alter the pH of the water you use, but it does help buffer the mix against acidity over time.