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HORTICULTURE

Premium Soil Amendments

The foundation of healthy growth starts below the surface. Whittemore’s perlite and vermiculite support balanced moisture, aeration, and root development across a wide range of horticultural growing environments.

PERLITE & VERMICULITE

Where Healthy
Growth Begins

Horticulture professionals rely on growing media that support consistent plant development.

Perlite and vermiculite are widely used across propagation, greenhouse production, and blended growing media to help manage root-zone conditions. Depending on the application, they may be used independently or combined to support different growing needs throughout the plant life cycle.

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PERLITE

Learn More

Perlite is a naturally occurring volcanic glass that expands when heated, forming a lightweight, porous material ideal for horticulture.

 

It's widely used in potting mixes, seed starting, propagation, soil conditioning, hydroponics, and other specialty growing systems. Its structure improves drainage, boosts oxygen flow, and helps prevent soil compaction and overwatering — creating the perfect environment for strong, healthy root development and reliable plant performance.

AVAILIBLE FORMATS

  • Bulk

  • Super sacks

  • Bagged (multiple sizes available) 

WHY GROWERS CHOOSE PERLITE

  • Perlite creates tiny air pockets in the soil, allowing excess water to drain away quickly while oxygen circulates freely around plant roots — essential for healthy growth.

  • Lightweight and rigid, perlite helps keep soil loose and well-structured. This prevents it from becoming hard or compacted, especially after watering.

  • With improved soil structure and consistent moisture levels, roots can grow deeper and spread more easily leading to healthier, more resilient plants.

  • Perlite’s excellent drainage keeps water from pooling around roots, reducing the chances of fungal diseases like root rot — a common problem in overwatered soil.

  • Perlite creates tiny air pockets in the soil, allowing excess water to drain away quickly while oxygen circulates freely around plant roots — essential for healthy growth.

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VERMICULITE

Vermiculite is a natural mineral that expands into soft, absorbent flakes when heated, making it a valuable material in horticulture.

 

It’s commonly used in seed starting, potting mixes, propagation, soil amendments, and even bulb and tuber storage. Its ability to retain moisture and nutrients while preventing compaction makes it ideal for promoting fast, even germination, supporting cuttings, and improving soil structure. Vermiculite helps regulate water availability across a range of growing conditions — from stabilizing sandy soils to protecting stored bulbs from rot — making it a versatile choice for consistent plant performance.

AVAILIBLE FORMATS

  • Bulk

  • Super sacks

  • Bagged (multiple sizes available) 

WHY GROWERS CHOOSE VERMICULITE

  • Absorbs water like a sponge, then slowly releases it to roots ensuring plants stay hydrated without becoming waterlogged.

  • Blends easily into soil to increase air space and keep growing media light and open, preventing compaction over time

  • Provides a gentle, stable environment where roots can grow freely and access consistent moisture and nutrients.

  • Helps retain essential nutrients in the root zone, reducing leaching and keeping fertilizers available to plants longer.

  • By holding moisture efficiently, vermiculite reduces the need for frequent watering, especially useful in dry or hot conditions.

Place an Order

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Lets Talk

Have a Project in Mind?
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Have a project in mind or just exploring options?

We're here to help. Whether you’re growing, building, or simply curious, we’ll help you find the right fit.

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Leon St Germain

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Horticulture

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Cross-Industry Applications

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WHO WE SERVE

Industrial

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TRUSTED
SINCE 1919

Your Trusted Source for

Premium Vermiculite & Perlite 

Since 1919, we’ve been manufacturing vermiculite and perlite products that builders, growers, and manufacturers can rely on. From early production methods to today’s precision-engineered processes, we’ve built a reputation for clean, consistent materials that perform the same way every time. Because in every industry, consistency creates confidence — and confidence is how stronger projects, products, and outcomes are built.

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Have questions? We’d love to hear from you. Fill out the form or reach out directly, and our team will get back to you shortly.

Serving manufacturers, distributors, and builders for over 100 years.
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