GROW!T Perlite Grade #3
Best coarse amendment for gardeners needing improved soil drainage and aeration.
Enhance your gardening with GROW!T #3 Perlite, a super coarse growing medium designed to improve soil structure and aeration. This versatile perlite is ideal for breaking up dense soils, promoting healthy root development, and ensuring optimal drainage in containers and garden beds. It's completely sterile, odorless, and lightweight, making it easy to handle and use as a primary hydroponic medium or for seed starting. This product now includes 15% more perlite, offering even greater value for your growing needs.
$37.99
Owner Satisfaction
4.5
/ 5
Category Rank
736
/ 1247
#736 in Soil
Price vs Category Average
-25%
Below average
Volume
4
/ cubic feet
Who it's for
- Gardeners focused on preventing root rot and improving oxygenation
- Long-term growers needing consistent drainage across multiple seasons
- Hydroponic enthusiasts and propagators seeking stable, non-moist support
Who should skip it
- Safety-conscious users avoiding inhalation of fine silica dust
- Gardeners frustrated by perlite floating to the soil surface
- Owners of moisture-loving plants requiring high water retention
Performance breakdown
Aeration capacity
Super coarse texture creates ideal air pockets for vigorous root respiration.
Drainage efficiency
Rapid water movement prevents root rot in dense potting mixes.
Sterility assurance
Completely pathogen-free composition ensures a safe start for delicate seedlings.
Hydroponic versatility
Stable, inert structure performs reliably in various water-based growing systems.
Handling ease
Lightweight material is easy to manage despite the large bulk volume.
Soil amendment value
Generous four-cubic-foot capacity provides excellent coverage for large garden projects.
Key Specs
Volume
4 cubic feet
Weight
28.5 lbs
pH Level
7.0
Texture
Coarse
Drainage Level
Fast Draining
Intended Use
Potting, Seed Starting
Soil Type
Potting Mix
Primary Amendment
Perlite
Features
- Improves soil aeration and drainage
- Sterile and odorless growing medium
- Ideal for breaking up heavy soils
- Suitable for hydroponic systems
- Aids in seed germination
- Lightweight and easy to handle
- Enhances root development
- Derived from natural sources
What customers say
Customers highly value the superior quality and consistent sizing of this perlite, noting its effectiveness for soil aeration and drainage. The larger Grade 3 particles are particularly favored for chunky mixes, perfect for aroids and succulents, as they maintain excellent structure without compacting. Although some dust is present, the overall high product quality and generous quantity deliver exceptional value. This perlite is established as a reliable staple for plant enthusiasts focused on achieving optimal root health.
Know before you buy
Grade #3 refers to a super coarse granule size, ranging from 1/8 inch to 5/8 inch. This larger particle size is specifically designed to create significant air pockets in the soil, which is ideal for heavy-rooting plants or improving drainage in dense potting mixes.
Yes, this perlite is suitable for hydroponic systems. Because it is sterile and provides excellent drainage and aeration, it serves as an effective inert medium for supporting plant roots in water-based setups.
No, GROW!T Perlite has a neutral pH of 7.0. It is chemically inert, meaning it will not alter the acidity or alkalinity of your existing soil or nutrient solution.
Yes, it is an excellent choice for seed starting. Its sterile nature helps prevent soil-borne diseases, and its lightweight texture allows delicate new roots to expand easily.
A common ratio is to mix one part perlite to three parts potting soil, though you can adjust this based on your plants' specific drainage needs. For plants that prefer very fast drainage, such as succulents, you may want to increase the perlite ratio.
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