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

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

PRO-MIX MPX AGTIV REACH is Premier Tech's multi-purpose peat-based growing medium, built around 85-95% Canadian Sphagnum peat moss for water retention, perlite for drainage and air-filled porosity, and calcitic and dolomitic limestone that pre-adjusts pH so the medium is ready to receive nutrients from the first watering. A wetting agent is blended in to eliminate dry pockets and get the whole bag re-wetting evenly after the medium dries down between irrigations.

This 2.8 cu ft loose fill bag arrives pre-expanded and ready to use straight out of the bag, with no reconstitution needed -- a practical size for smaller potting runs, trial batches, or operations that prefer to manage inventory in individual bags rather than pallet-scale bales.

Key Features & Benefits

• 85-95% Canadian Sphagnum peat moss — gives the medium medium-to-high water retention and a consistent, low-bulk-density structure across a wide range of crop types and container sizes.
• Perlite for drainage and aeration — opens up air-filled pore space so roots get adequate oxygen even under frequent irrigation, reducing the risk of compaction and anaerobic zones.
• AGTIV REACH mycorrhizae — inoculates the root zone with beneficial fungi that extend a plant's effective water- and nutrient-absorption area beyond the root itself, building resilience to drought, transplant shock, and salt stress.
• Calcitic and dolomitic limestone — pre-adjusts substrate pH before the bag or bale is even opened, cutting down on the amendment work growers would otherwise do at potting time.
• Integrated wetting agent — helps the medium re-wet evenly after a dry spell instead of forming hydrophobic pockets that leave parts of the root zone starved for water.

Who Should Use This

MPX AGTIV REACH is built for commercial greenhouse producers, indoor cultivation operations, and nursery growers who need one dependable, multi-purpose peat-based substrate across a mix of crop types rather than a separate specialty mix for each program. Its balance of water retention and aeration works across cell packs, hanging baskets, and mid-size containers alike.

About PRO-MIX

PRO-MIX comes from Premier Tech. The company has sold peat substrate since 1923. It introduced PRO-MIX in 1968. Premier Tech runs its own peat bogs. It also runs its own processing plants. Its distribution reaches North America and beyond. The company runs a biotechnology lab too. That's where AGTIV mycorrhizal inoculants get made. Premier Tech controls its own peat and coco supply. It also formulates the biological additives blended in. That combination helps standardize formulas like AGTIV REACH. The formula stays consistent across package sizes.

Frequently Asked Questions

What does AGTIV REACH mycorrhizae actually do in this medium?

AGTIV REACH is Premier Tech's proprietary endomycorrhizal inoculant, built on the PTB299 strain of Glomus intraradices. Once the fungus colonizes a plant's roots, its hyphae extend well past the root itself, increasing the effective surface area available for water and nutrient uptake and helping the plant tolerate drought, salinity, and transplant stress.

Is PRO-MIX MPX AGTIV REACH OMRI Listed for organic production?

No, MPX is not currently OMRI Listed. Growers working under a certified organic program should check with their certifying agency before using it in certified production, and consider PRO-MIX's OMRI Listed coco-based lines instead if certification is required.

How much usable medium does the 2.8 cu ft loose fill bag provide?

The 2.8 cu ft figure is the full usable, pre-expanded volume in the bag -- there's no compression to account for and nothing to fluff up before use. It's sized for smaller-batch potting runs where a full compressed bale would be more volume than needed at once.

Can this medium be used to start seeds as well as finish crops?

Yes. The medium particle size and moderate bulk density support germination and early root development for most standard greenhouse seed-starting and transplant work. Very fine-seeded crops may still do better in a dedicated, finer-screened propagation mix.

How should an unopened bag or bale be stored before use?

Keep it indoors or under cover in a dry, frost-free space, out of prolonged direct sun. Once it's opened, reseal or cover what's left so the remaining medium doesn't pick up excess moisture or contamination before the next use.