Supreme Perlite Medium Horticultural Perlite for Potting Soil Mixes, 4 Cu Ft Bag

Supreme Perlite Medium Horticultural Perlite is a professional-grade organic soil amendment designed to transform any potting mix into a high-performance growing medium. Whether you are starting seeds, repotting houseplants, or building a specialty blend for cactus, succulents, or orchids, this perlite delivers the aeration, drainage, and root support your plants need to thrive indoors and outdoors.

Perlite works by increasing the pore space within your soil or soilless mix, allowing oxygen to reach plant roots while excess moisture drains freely. This prevents the compaction and waterlogging that leads to root rot — one of the most common causes of plant failure in container gardens, raised beds, and indoor pots. Adding perlite to your compost, peat moss, coco coir, or worm casting blends creates a lighter, more balanced growing medium.

The medium particle size — approximately 1/4 inch or 4–5 mm — makes this perlite versatile across a wide range of applications. It integrates cleanly into seed starting mixes, propagation trays, bonsai soil, and hydroponic systems without clumping or breaking down over time, giving roots consistent structure throughout the growing season.

This perlite is made from 100% natural expanded volcanic rock — a clean, organic-friendly amendment that is sterile, pH neutral, odorless, and non-toxic. OMRI Listed for organic agriculture, it introduces no harmful chemicals or pathogens into your soil, making it safe for vegetable gardens, edible herbs, and delicate indoor plants like orchids and tropical houseplants. It can also help break up dense clay soils, improving drainage and air circulation in garden beds and containers..

The large 4 cubic foot bulk bag provides ample material for mixing multiple batches of custom potting soil, filling raised garden beds, or supplying a greenhouse or nursery operation. With Supreme Perlite, gardeners at every level get a reliable, high-quality perlite that improves every grow.

• 4 cubic feet bag of medium horticultural perlite ideal for potting soil, seed starting, propagation, and general organic gardening
• Blend of fine and medium particles provides balanced aeration and moisture retention for healthier root development
• Medium-size perlite, approximately 1/4 inches (4-5 mm) or smaller, is perfect for seedling mixes and finer potting blends
• Clean, sterile, lightweight, and pH neutral, making it suitable for a wide range of plant varieties and soil types
• Excellent for mixing into garden beds, hydroponic systems, cactus and succulent soil, tropical blends, and propagation trays
• OMRI Listed for organic use and made from natural expanded volcanic perlite that is odorless, non-toxic, and asbestos-free
• Ideal for professional growers, hobby gardeners, and plant enthusiasts needing a bulk supply of quality perlite
• Material: Perlite
• Color: White/Off-White
• Dimensions (L x W x H): 38 x 20 x 8 inches
• Weight: 24 pounds