GROW!T Perlite Grade #4, 4 cu ft

Medium-Coarse Aeration and Drainage Amendment, Grade #4, 4 cu ft

Perlite grade matters more than most growers expect, since the wrong particle size can leave a container mix either too dense to drain or so coarse that it dries out faster than the roots around it can use the water. GROW!T Perlite is a versatile, inert soil amendment and soilless medium sourced from a natural volcanic mineral, sterile and neutral enough to add aeration and drainage without shifting the pH of whatever it's blended into.

This Grade #4 perlite (1/3" to 3/4" granules) sits toward the coarser end of the GROW!T lineup, sized for growers who want pronounced aeration and drainage in a 4 cu ft bag for container gardening, propagation, or hydroponic use.

Key Features & Benefits

• Enhanced Aeration and Drainage — improves airflow to roots in heavier mixes.
• Completely Sterile — free of pathogens and weed seed.
• Neutral pH Near 7.0 — won't shift the pH of the surrounding growing mix.
• Odorless and Lightweight — easy to handle and blend into soil.
• Natural Volcanic Source — derived from a naturally occurring mineral.

Who Should Use GROW!T Perlite Grade #4, 4 cu ft

This grade fits growers who need a graded perlite for container aeration, seedling propagation, or hydroponic use, where a medium-coarse granule provides pronounced drainage without going to the largest size in the lineup.

About GROW!T Perlite

GROW!T sources and grades its perlite for consistent granule size, giving growers a sterile, lightweight amendment across a range of grades from super coarse to fine, sold alongside its coco coir line of growing media.

Frequently Asked Questions

What granule size is Grade #4?

Grade #4 perlite granules measure 1/3" to 3/4". That sizing determines how much aeration versus water retention the perlite contributes when blended into a mix.

Is this perlite sterile?

Yes, GROW!T Perlite is completely sterile, free of pathogens and weed seed. That makes it safe to blend directly into a growing mix without introducing contamination.

What is the pH of this perlite?

It has a neutral pH of around 7.0, so blending it into a mix doesn't shift the overall pH of the growing medium. Growers can adjust pH through their nutrient program without perlite working against that.

How is this perlite used in hydroponics versus soil?

It works as a stand-alone or blended hydroponic medium, and as a soil amendment for aeration and drainage. Its inert, sterile composition suits both applications equally well.

What other grades are available?

GROW!T Perlite is also available in Grades #2, #3, #4, and #8 for different granule sizes. Choosing a grade depends on how much aeration versus water retention a given mix or application needs.