Horticultural Obsidian Granules

Potting Media Additive:

The use of Red Dome Granules to existing formulations can be beneficial where there is a need for added opening up and aeration of the mix. This is especially beneficial for repotting existing plants

Blending Your Own Potting Soil 

For a clean soil-less mix, here are three formulas excellent for virtually all potted plants.

FORMULA 1: For fibrous rooted plants like African Violets and Gloxinias, blend 1 part Sphagnum Peat Moss and 2 parts Red Dome Granules.

FORMULA 2: For Succulents and Cactus, blend 1 part Sphagnum Peat Moss and 3 parts Red Dome Granules.

FORMULA 3: For Philodendron, Fern, Begonias and plants requiring soil that holds considerable moisture, blend 2 parts Sphagnum Peat Moss and 1 part Red Dome Granules.

For All Formulas:

To each gallon of mix add 1 and 1/2 level tablespoons Dolomitic Lime. Mix thoroughly. Apply lime every other month at 1 tablespoon per 12 inches of potted plant.

For established plants requiring higher PH, use up to double the amount of non hydrated ground lime stone per gallon of mix.


For Loosening Heavy or Clay Garden Soils:
For Root Cuttings:
For Starting Seeds:
To Store Bulbs:
Use In Place of Vermiculite, Perlite, and Pumice:



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