PRO-MIX BX MYCORRHIZAE | 3.8cu ft - Compressed Bale

General-Purpose Mycorrhizal Growing Medium, 3.8cu ft Compressed Bale

General greenhouse transplanting stresses a plant's roots, and a plain peat-perlite medium doesn't do anything to help a transplant recover from that stress on its own. PRO-MIX BX Mycorrhizae is built on 75-85% Canadian sphagnum peat moss and horticultural grade perlite, with Mycorrhizae PTB299 (Glomus intraradices) blended in — a beneficial endomycorrhizal fungus that increases a plant's resistance to the stresses tied to transplanting, nutrition, and drought.

This 3.8cu ft compressed bale expands after opening and is sized for growers who want more usable volume per package than the 2.8cu ft loose fill bag without moving up to bulk 80cu ft.

Key Features & Benefits

• Mycorrhizae PTB299 (Glomus intraradices) — colonizes roots to extend nutrient and water uptake and increase resistance to transplant, nutrition, and drought stress.
• 75-85% Canadian Sphagnum Peat Moss — the fibrous majority of this general-purpose blend.
• Horticultural Grade Perlite — blended in for supplemental drainage and root-zone aeration.
• General Purpose Formula — built for general greenhouse use and transplanting applications rather than a specialty crop profile.
• Supports Crop Vigor — the mycorrhizal inoculant is associated with improved plant quality and flower or fruit quantity in Premier Tech's own formula documentation.

Who Should Use PRO-MIX BX Mycorrhizae

This formula fits greenhouse growers and nurseries doing general transplanting work who want a peat-based medium with mycorrhizae already blended in, rather than applying an inoculant as a separate step.

About PRO-MIX

Premier Tech has run its own peat bogs since 1923 and introduced the PRO-MIX brand in 1968. Its biotechnology lab produces the PTB299 mycorrhizal strain blended into the BX Mycorrhizae formula.

Frequently Asked Questions

What does the Mycorrhizae in this medium do?

Mycorrhizae PTB299 (Glomus intraradices) is a beneficial endomycorrhizal fungus that colonizes plant roots and extends their effective reach for water and nutrient uptake. Premier Tech's own formula documentation associates it with increased resistance to the stresses of transplanting, nutrition, and drought.

What is this medium made of?

It's built on 75-85% Canadian sphagnum peat moss with horticultural grade perlite and Mycorrhizae PTB299 blended in. That combination gives the medium peat's water retention alongside perlite's drainage and the mycorrhizal inoculant's root-zone benefit.

What is this medium designed for?

It's formulated for general greenhouse use and transplanting applications rather than one specialty crop type. Growers who need higher porosity for water-sensitive crops may prefer PRO-MIX HP instead.

Do I need to add a separate mycorrhizal inoculant?

No, Mycorrhizae PTB299 is already blended into the medium at the manufacturing stage. There's no separate inoculation step required at potting or transplanting.

How many package sizes are available?

This medium ships in multiple formats, including 2.8cu ft loose fill, 3.8cu ft compressed bale, and 80cu ft bulk. Match the purchase to a small potting run or a full commercial program.