PRO-MIX HP Biofungicide + Mycorrhizae, 3.8 cu ft

High-Porosity Medium with Biofungicide Protection, 3.8cu ft Package

Water-sensitive crops that need a high-porosity medium are also often the crops most exposed to root disease during the vulnerable early-growth window, since consistently moist propagation conditions favor both faster rooting and faster pathogen spread. PRO-MIX HP Biofungicide + Mycorrhizae builds on the standard HP peat-and-perlite base with two biological additives blended in: Mycorrhizae PTB299 for root development and Biofungicide PTB180 (Bacillus subtilis), which colonizes developing roots to help suppress disease organisms.

This 3.8cu ft package is suited to water-sensitive crops that need both strong drainage and built-in root disease protection at a larger commercial scale.

Key Features & Benefits

• High Perlite Content — delivers strong drainage and air porosity for water-sensitive crops.
• Biofungicide PTB180 (Bacillus subtilis) — colonizes developing roots to help suppress disease organisms.
• Mycorrhizae PTB299 — supports nutrient and water uptake and overall root health.
• Peat Base Around 65-75% — Canadian sphagnum peat moss makes up the fibrous majority of the medium, offset by the elevated perlite ratio.
• Dual Biological Protection — combines root-zone disease suppression with the nutrient-uptake benefit of mycorrhizae in a high-porosity medium.

Who Should Use PRO-MIX HP Biofungicide + Mycorrhizae

This medium fits growers who need high air porosity and low water retention for water-sensitive crops, along with built-in root disease protection during watering-flexible crop cycles.

About PRO-MIX

Premier Tech launched PRO-MIX in 1968, extending a peat-substrate business it has operated since 1923. Its biotechnology lab produces both the PTB299 mycorrhizal strain and the PTB180 Bacillus subtilis biofungicide blended into this HP formula.

Frequently Asked Questions

What makes this mix high porosity?

Its high perlite content, the same elevated ratio used in standard PRO-MIX HP, provides strong drainage and air porosity for water-sensitive crops. That drainage profile is what makes the medium a fit for pairing with a biofungicide, since it doesn't stay saturated as long as a general-purpose mix.

What does the Biofungicide do?

Biofungicide PTB180 (Bacillus subtilis) colonizes developing roots to help suppress disease organisms, working as a protective presence in the root zone rather than a one-time treatment. It's blended into the medium alongside the Mycorrhizae.

What is the peat content?

The mix runs approximately 65-75% Canadian sphagnum peat moss, the same base ratio as standard PRO-MIX HP. The two biologicals are folded into that peat-and-perlite structure rather than changing it.

Do I still get the drainage benefits of HP with the added biologicals?

Yes, this formula keeps the same high-porosity peat-and-perlite base as standard PRO-MIX HP. The Biofungicide and Mycorrhizae are additives layered onto that base rather than a different structural formula.

How many package sizes are available?

This Biofungicide + Mycorrhizae formula ships in both 2.8cu ft and 3.8cu ft package sizes. Pick the size that fits a propagation bench or a larger commercial program.