Course Perlite Growing Media
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Course perlite is a lightweight, volcanic glass-based growing medium used to improve aeration, drainage, and root development in soil mixes and hydroponic setups. Its larger particle size compared to standard perlite makes it particularly effective at preventing compaction and retaining oxygen around root zones. Overall, it is a reliable and versatile amendment that delivers consistent results for a wide range of growing applications.
Key Features & Specs
| Particle Size | Coarse grade, typically 3-6mm particles, larger than standard horticultural perlite |
|---|---|
| Material | Naturally occurring volcanic glass, expanded by heat treatment for a porous, lightweight structure |
| Drainage | Excellent drainage properties that prevent waterlogging and reduce root rot risk |
| Aeration | High air porosity helps maintain oxygen levels around roots, supporting vigorous plant growth |
| pH Level | Neutral to slightly alkaline pH, generally between 7.0 and 7.5, suitable for most plants |
| Compatibility | Works well as a soil amendment, in hydroponic systems, and as a standalone grow medium for cuttings |
| Weight | Very lightweight, making it easy to handle and ideal for container gardening where weight is a concern |
Best for: Course perlite is ideal for experienced and beginner gardeners alike who want to improve drainage and aeration in potting mixes, raised beds, or hydroponic systems, especially those growing plants sensitive to overwatering such as succulents, orchids, or cannabis.