PRO-MIX® MPX AGTIV® REACH™ Multi-Purpose Growing Medium — 2.8 cu ft Loose Fill

High-Retention Peat & Perlite Growing Medium with AGTIV® REACH™ Mycorrhizal Support — 2.8 cu ft Loose Fill

Key Features & Benefits

• 85–95% Canadian Sphagnum Peat Moss: Premium peat base delivers medium-to-high water retention with low bulk density, maintaining a consistently moist root zone while reducing irrigation frequency and supporting water conservation across a wide range of crop types.
• 5–15% Horticultural-Grade Perlite: Improves air-filled porosity and drainage to prevent compaction and anaerobic conditions, ensuring roots receive adequate oxygen throughout the crop cycle even under high-frequency irrigation programs.
• AGTIV® REACH™ Endomycorrhizae: Contains beneficial Glomus intraradices that colonise the root system, extending the effective nutrient and water absorption reach well beyond the root zone and increasing plant resilience against drought, salt stress, and transplant shock.
• Calcitic and Dolomitic Limestone: Pre-adjusted pH supports optimal nutrient availability from the first watering for a broad range of greenhouse and indoor crops, reducing the need for pH correction amendments during crop establishment.
• Wetting Agent Included: Ensures rapid, even re-wetting after dry periods, eliminating hydrophobic zones and delivering consistent moisture distribution across the entire container volume during every irrigation cycle.
• Loose Fill Format — 2.8 cu ft: Convenient loose fill format is ready to use directly from the bag with no reconstitution required, ideal for high-throughput potting and transplanting workflows at any production scale.

Who Should Use This

PRO-MIX® MPX AGTIV® REACH™ is designed for commercial greenhouse producers, indoor cultivation operations, and nursery growers who need a dependable, multi-purpose peat-based substrate across a wide variety of crop types. Its balanced water retention and aeration profile make it equally effective for cell pack production, hanging baskets, potted ornamentals, herbs, vegetables, and fruiting crops in climate-controlled growing environments.

Compatibility

Compatible with standard liquid, granular, and controlled-release fertiliser programs. Works effectively with drip, overhead, and flood-and-drain irrigation systems. AGTIV® REACH™ mycorrhizae are compatible with most conventional and organic nutrient programs at standard application rates. Suitable for cell packs, small pots, hanging baskets, and mid-size containers. Pre-adjusted pH and integrated wetting agent minimise the need for additional substrate amendments on potting day.

Frequently Asked Questions

What is AGTIV® REACH™ and how does it benefit greenhouse crops?

AGTIV® REACH™ is Premier Horticulture’s proprietary endomycorrhizal technology using the PTB299 strain of Glomus intraradices, selected for its ability to colonise a broad range of crop species rapidly under commercial conditions. The fungal hyphae extend well beyond the root zone, dramatically increasing effective nutrient and water absorption surface area and helping plants tolerate drought, salt, and transplant stress throughout production.

Is PRO-MIX® MPX AGTIV® REACH™ suitable for organic production?

PRO-MIX® MPX is not currently OMRI Listed®. Growers pursuing certified organic production should consult their certifying agency to determine whether this product meets their certification requirements before use.

How does the 2.8 cu ft loose fill translate to usable growing medium?

Loose fill bags are pre-expanded and ready to use immediately. No reconstitution or additional fluffing is required. The stated cubic footage reflects the full usable volume available straight from the bag.

Can PRO-MIX® MPX be used as a seed-starting medium?

Yes. The medium particle size and low bulk density of MPX support germination and early root development for most standard greenhouse and transplant seed-starting applications. For very fine or small-seeded crops, a fine-screened propagation medium may offer better seed-to-media contact, but MPX performs reliably across the majority of commercial seed-starting scenarios.

How should unused MPX be stored between production cycles?

Unopened bales or bags should be stored indoors or under cover in a dry, frost-free environment away from prolonged UV exposure and standing water. Once opened, reseal or cover the remaining medium to prevent moisture loss or contamination before next use.