PRO-MIX FPX BIOFUNGICIDE | 2.8cu ft - Loose Fill

Fine-Textured Plug and Germination Mix with Biofungicide, 2.8cu ft

Water-sensitive crops started as plugs or seedlings need a finer, faster-draining texture than a general potting medium, along with protection against the damping-off pathogens that thrive in a consistently moist propagation environment. PRO-MIX FPX Biofungicide is a fine-textured plug and germination mix built on 80-90% Canadian sphagnum peat moss and horticultural grade perlite, with Biofungicide PTB180 (Bacillus subtilis) blended in to help suppress root pathogens including Fusarium, Pythium, and Rhizoctonia.

This 2.8cu ft loose fill bag is sized for propagation benches running plug trays or seedling flats of water-sensitive crops.

Key Features & Benefits

• Fine Plug and Germination Texture — a finer particle size than PRO-MIX BX or HP, suited to developing seedlings and plugs.
• Biofungicide PTB180 (Bacillus subtilis) — helps suppress root pathogens including Fusarium, Pythium, and Rhizoctonia that cause root diseases.
• Low Water Retention — reduces overwatering risk for water-sensitive crops during the germination stage.
• 80-90% Canadian Sphagnum Peat Moss — a fine-fibered, high-quality base that supports even moisture at the seedling scale.
• Horticultural Grade Perlite — adds drainage and air porosity suited to developing root systems.

Who Should Use PRO-MIX FPX Biofungicide

This formula fits growers starting plugs and seedlings from water-sensitive crops who want built-in biofungicide protection against root pathogens during that early, vulnerable growth stage.

About PRO-MIX

PRO-MIX has been Premier Tech's growing-media brand since 1968, built on a peat supply the company has managed since 1923. The FPX line pairs that fine-graded peat with the PTB180 Bacillus subtilis biofungicide produced at Premier Tech's biotechnology lab.

Frequently Asked Questions

What pathogens does the Biofungicide help suppress?

Biofungicide PTB180 (Bacillus subtilis) is formulated to help suppress Fusarium, Pythium, and Rhizoctonia, three root pathogens that commonly cause damping-off and root disease in propagation. It works by colonizing the root zone rather than acting as a one-time drench treatment.

What is this mix designed for?

It's built for plug and germination use with water-sensitive crops, where a fine texture and low water retention matter more than they would for a general transplant medium. Growers doing general greenhouse transplanting rather than plug production may prefer PRO-MIX BX instead.

What is FPX made of?

It's 80-90% Canadian sphagnum peat moss with horticultural grade perlite, a finer blend than PRO-MIX BX's general-purpose formula. The Biofungicide PTB180 is blended into that base.

Why does low water retention matter for seedlings?

Water-sensitive crops and developing seedlings are more prone to damping-off and root rot when the medium stays saturated too long between waterings. FPX's texture and perlite content are formulated to drain faster than a standard potting medium.

How many package sizes are available?

This formula ships in 2.8cu ft loose fill and 3.8cu ft compressed formats. Growers can size the purchase to a propagation bench or a larger commercial plug operation.