PRO-MIX BX BIOFUNGICIDE + MYCORRHIZAE | 2.8cu ft - Loose Fill

Biofungicide-Protected Mycorrhizal Growing Medium, 2.8cu ft

Root rot pathogens can undo the benefit of an otherwise well-drained growing medium, especially during the vulnerable window right after transplanting. PRO-MIX BX Biofungicide + Mycorrhizae builds on the same 75-85% Canadian sphagnum peat moss and horticultural grade perlite base as standard BX, then adds two biological additives: Mycorrhizae PTB299 for root development and stress resistance, and Biofungicide PTB180 (Bacillus subtilis), bacterial spores that germinate and grow around the root system to form a protective shield against certain root rot pathogens.

This 2.8cu ft loose fill bag is sized for general greenhouse and transplanting work where growers want biological root protection built into a smaller-batch format.

Key Features & Benefits

• Biofungicide PTB180 (Bacillus subtilis) — bacterial spores that germinate and colonize the root system, forming a protective shield against certain root rot pathogens.
• Mycorrhizae PTB299 (Glomus intraradices) — extends nutrient and water uptake and increases resistance to transplant, nutrition, and drought stress.
• 75-85% Canadian Sphagnum Peat Moss — forms the fibrous base this formula shares with standard PRO-MIX BX.
• Horticultural Grade Perlite — works alongside the peat base to keep drainage and air exchange steady.
• Dual Biological Protection — combines root-zone disease suppression with the nutrient-uptake benefit of mycorrhizae in a single medium.

Who Should Use PRO-MIX BX Biofungicide + Mycorrhizae

This formula fits greenhouse growers and nurseries transplanting crops who want built-in root protection alongside mycorrhizae, rather than applying a biofungicide drench as a separate step.

About PRO-MIX

Premier Tech's peat business dates to 1923, and the company introduced PRO-MIX as a growing-media brand in 1968. Its biotechnology lab produces both the PTB299 mycorrhizal strain and the PTB180 Bacillus subtilis biofungicide blended into this BX formula.

Frequently Asked Questions

What does the Biofungicide do?

Biofungicide PTB180 is Bacillus subtilis, bacterial spores that germinate and grow around the root system to form a protective shield against certain root rot pathogens. It works alongside the medium's natural drainage rather than replacing good watering practices.

What does the Mycorrhizae do?

Mycorrhizae PTB299 (Glomus intraradices) colonizes plant roots and increases resistance to the stresses tied to transplanting, nutrition, and drought. It's blended in alongside the biofungicide rather than sold separately.

What is this medium designed for?

It's formulated for general greenhouse uses and transplanting applications, giving growers biological root protection during that vulnerable post-transplant window. Growers who don't need the added disease protection may prefer plain BX Mycorrhizae instead.

What is this medium made of besides the biologicals?

It's built on the same 75-85% Canadian sphagnum peat moss and horticultural grade perlite base as standard PRO-MIX BX. The Biofungicide and Mycorrhizae are blended in on top of that base.

How many package sizes are available?

This formula ships in 2.8cu ft loose fill and 3.8cu ft compressed bale formats. Pick the size that fits a smaller potting run or a larger commercial batch.