SP Super Coarse Horticultural Perlite for Potting Soil Mixes, 4 Cu Ft Bag

Create healthier, better-draining growing environments with Natural Volcanic Perlite, a versatile soil amendment designed to support strong root development and vigorous plant growth. Lightweight and easy to blend, horticultural perlite is ideal for making DIY or lightweight potting soil, improving existing garden beds, and enhancing specialty plant mixes. Use it in orchid blends, succulent and cactus mixes, hydroponic systems, soilless potting media, and aerated indoor plant mixes for tropical plants and aroids.

Perlite naturally holds both air and moisture, creating the balanced environment roots need to thrive. Improving oxygen flow while retaining just enough moisture helps reduce conditions that can lead to root rot and soil compaction. This makes it one of the best mediums for propagating plant cuttings and starting seeds indoors, giving young plants the ideal foundation for healthy growth.

For a high-quality, well-draining potting mix, use the trusted “1:1:1” ratio—combine equal parts perlite, peat moss, and organic compost. This blend works perfectly for containers, propagation trays, and transplanting mixes. You can also mix perlite directly into heavy garden soil or dense clay to lighten, aerate, and restore raised beds for improved performance.

Natural Volcanic Perlite is made from naturally occurring volcanic glass (obsidian) that is expanded with heat, containing no synthetic ingredients. Proudly made in the U.S.A. from 100% domestic ore sources and supported by a domestic labor force, it’s a high-quality growing medium that supports American jobs and manufacturing while helping your plants thrive.

• Includes a bulk size package, 4 cubic feet or 102 US Dry Quarts
• Contains horticultural perlite for making potting soil, mixing into garden beds, propagating plants from cuttings, hydroponics, tropical and aroid mixes
• Consists of large, coarse grains roughly 3/8-inch in diameter and larger, perfect for increased drainage and aeration
• Perfect bag size for professional growers, home gardeners, and plant hobbyists
• Super Coarse perlite promotes superior drainage and aeration, perfect for orchids, succulents, and other plants
• Maintains oxygen availability at the root zone by providing rapid drainage to prevent waterlogging and support root anchoring without compacting over time
• Ideal for bucket systems and Dutch pots commonly used for growing peppers, tomatoes, and cucumbers
• Expanded perlite is clean, sterile, pH-neutral, odorless, non-toxic, durable, non-flammable, and asbestos-free
• OMRI Listed for use in organic agriculture
• 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

What material is the potting soil made of?

The potting soil is constructed from glass. The construction is built to handle exposure to outdoor conditions including sun and moisture. This material choice supports everyday use while maintaining the structural integrity needed for the product’s intended applications.

What are the dimensions of 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.

What is the storage capacity of the potting soil?

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.

How do I clean and care for the potting soil?

Clean with standard glass cleaner and a lint-free cloth. Handle with care to avoid chips or cracks. Regular light cleaning extends the lifespan of the potting soil and keeps it looking and performing well over time.