PRO-MIX HPCC MYCORRHIZAE | 3.8cu ft - Compressed (30/PL)

Chunk Coir, Peat, and Perlite Blend for Root Zone Control, 3.8cu ft Compressed

Hanging baskets and large containers dry out fast and compact over a long growing season, which is a different root-zone challenge than a standard transplant flat faces. PRO-MIX HPCC blends chunk coir into a 65-75% Canadian sphagnum peat moss and horticultural grade perlite base, with Mycorrhizae PTB299 added for root development, giving growers well-calculated control over water retention, drainage, and air porosity in the root zone.

This 3.8cu ft compressed format ships 30 per pallet and expands after opening, sized for larger hanging-basket or long-term container programs.

Key Features & Benefits

• Chunk Coir Blended In — reduces compaction versus a straight peat mix over a long-term planting.
• High Water Retention and Drainage — a balanced root-zone profile suited to containers that dry out fast.
• Mycorrhizae PTB299 — expands root systems and increases resistance to root-zone stress.
• 65-75% Canadian Sphagnum Peat Moss — the fibrous base of the medium, blended with chunk coir and perlite.
• Suited to Hanging Baskets — also performs well in large containers and long-term crop cycles.

Who Should Use PRO-MIX HPCC Mycorrhizae

This medium fits growers producing hanging baskets, large containers, or long-term crops who want a chunk-coir blend with well-calculated root zone control rather than a straight peat-perlite mix.

About PRO-MIX

PRO-MIX is Premier Tech's growing-media brand, introduced in 1968 on top of a peat business the company has run since 1923. HPCC pairs Premier Tech's peat and coco coir supply with the PTB299 mycorrhizal strain produced at its biotechnology lab.

Frequently Asked Questions

What makes HPCC different from HP?

HPCC adds chunk coir to the peat and perlite base that standard PRO-MIX HP uses, which reduces compaction and increases water retention over a long-term planting. HP without the coir addition is the better fit for shorter propagation cycles.

What is this mix suited for?

It's formulated for hanging baskets, large containers, and long-term crops. Compaction and drying-out over a full season are bigger concerns for those crops than they are for a short transplant cycle.

What does the Mycorrhizae do?

Mycorrhizae PTB299 expands the root system, enhances nutrient and water uptake, and increases the plant's resistance to root-zone stress. It's blended into the mix rather than applied separately.

What is the peat content?

Canadian sphagnum peat moss makes up roughly 65-75% of the blend by volume, the same base ratio as standard PRO-MIX HP. Chunk coir and horticultural grade perlite make up the rest.

How many package sizes are available?

This HPCC formula ships in both 2.8cu ft and 3.8cu ft formats. Choose the size that fits a bench of hanging baskets or a larger long-term container program.