Horticulture
Perlite for Horticulture
Fast Drainage
Root Oxygenation
Lightweight Growing Media
Why Growers Choose Perlite
Perlite is one of the most widely used soil amendments in commercial horticulture, valued for its ability to improve drainage, aeration, and root-zone structure in growing media.
Unlike vermiculite, which retains moisture, perlite is used to prevent waterlogging and keep root zones oxygenated,making it essential for greenhouse production, propagation, and hydroponic systems.
Its lightweight, sterile, and pH-neutral properties make it a reliable component in professional growing operations.
Perlite is designed to move water through the system, while vermiculite is designed to hold it.
Not sure whether perlite or vermiculite is right for your application? Perlite vs Vermiculite →
Common Applications
Available Formats
- Bulk
- Super sacks
- Bagged (multiple sizes available)
Sizes and Gradations
Different applications require different particle sizes. Whittemore offers a full range of horticultural vermiculite grades designed for moisture control, root support, and growing system performance. Sizes shown are typical industry ranges, and we can align to your exact specifications.
Fine
Typical size: ~0.5–1.5 mm
Small particles ideal for seed starting blends, micro plugs, and propagation. Helps reduce compaction while retaining moisture.
Medium
Typical size: ~1.5–3 mm
Most common horticulture grade, used in standard potting mixes and greenhouse production.
Coarse
Typical size: ~3–6 mm
Larger particles with open structure that improve drainage in heavier mixes.
Super Coarse Plus
Typical size: ~5–8 mm
Maximum aeration and drainage for specialty applications including orchids, succulents, and cactus.
