Supreme Perlite Medium Horticultural Perlite is a professional-grade soil amendment designed to support healthy plant growth in a wide range of gardening applications. This large 4 cubic foot bulk bag provides an excellent supply for growers, greenhouse operators, and home gardeners who rely on consistent, high-quality perlite for potting soil blends, seed starting trays, hydroponic systems, propagation work, and specialty plant mixes.
This medium-particle perlite contains a blend of fine and mid-sized grains, typically around 1/4 inch (4-5 mm) or smaller, creating an ideal balance of aeration and moisture retention. The improved airflow supports stronger root development, helps prevent soil compaction, and encourages faster, healthier plant growth. It is particularly well-suited for seedling mixes, tropical and aroid soil blends, cactus and succulent substrates, and potting mixes that require increased water-holding capacity without sacrificing drainage.
Made from natural expanded volcanic perlite, this product is clean, sterile, lightweight, and pH neutral. It is completely odorless, non-toxic, non-flammable, and asbestos-free, making it safe for both indoor and outdoor gardening environments. Whether you’re mixing soil for houseplants, building raised bed blends, refreshing container gardens, or propagating cuttings, this perlite contributes to a consistently airy, workable medium.
Supreme Perlite is OMRI Listed for use in organic agriculture, giving growers confidence in a high-quality amendment that meets strict organic standards. From potting mixes to propagation and beyond, this perlite delivers durability, consistency, and performance you can count on.
- 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
Questions? We’ve Got Answers.
Helpful answers about product features, setup, and more
How big is the potting soil?
The potting soil measures 38 x 20 x 8 inches (length x width x height). Use these measurements to confirm the product fits your intended setup before ordering.
How is the potting soil typically used in a garden?
The potting soil is used for outdoor gardening, landscaping, or lawn care tasks such as planting, soil preparation, weed control, or watering depending on the specific product. It is intended for outdoor use in gardens, raised beds, planters, or other growing areas.
How much can the potting soil hold?
The potting soil has a 4-cubic feet capacity. This makes it a practical size for organizing the items it is designed to hold without taking up excessive room in your space.
Can the potting soil be used indoors and outdoors?
Yes. The potting soil is suitable for both indoor and outdoor use. It can be placed in areas such as patios, decks, garages, mudrooms, or entryways depending on the space and storage needs.
What color is the potting soil?
This potting soil comes in white. The color provides a neutral finish that coordinates with a wide range of décor styles. It works in both indoor and outdoor settings depending on placement.
Who makes the potting soil?
The potting soil is made by Supreme Perlite. Supreme Perlite produces this item as part of its lineup, and product details such as specifications, included accessories, and warranty terms are set by the brand.
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