Pro-Mix
Pro-Mix BX Mycorrhizae Bale
Best versatile growing medium for home gardeners seeking healthier root development.
Elevate your gardening with PRO-MIX BX Mycorrhizae, a premium peat-based growing medium designed for exceptional plant performance. This versatile mix is enriched with beneficial mycorrhizal inoculum to foster robust root development, ensuring healthier and more vigorous plants. Ideal for general potting, seed starting, and container gardening, it provides a balanced environment for a wide variety of vegetables, flowers, and houseplants. Experience consistent, reliable results and support your plants' growth from the roots up with this trusted formulation.
$25.00
Owner Satisfaction
4.7
/ 5
Category Rank
11
/ 1247
#11 in Soil
Price vs Category Average
-51%
Below average
Volume
3.8
/ cu ft
Who it's for
- Commercial growers needing uniform results across large-scale plantings
- Plant parents wanting a balanced, well-draining growing medium
- Gardeners seeking stronger root systems and better nutrient uptake
Who should skip it
- Eco-conscious growers concerned about peat harvesting and long-term compaction
- Casual hobbyists with limited storage space or small projects
- Budget-conscious gardeners looking for inexpensive retail potting soil
Performance breakdown
Root Development
Mycorrhizal fungi significantly accelerate root system establishment and nutrient uptake.
Water Retention
Peat-based structure maintains ideal moisture levels for consistent plant hydration.
Versatility
Adapts seamlessly from delicate seed starting to robust container gardening.
Drainage Efficiency
Perlite and vermiculite inclusions prevent soil compaction and root rot.
pH Stability
Limestone additives ensure a balanced environment for diverse plant species.
Ease of Handling
Large bale format requires significant storage space and manual labor.
Key Specs
Volume
3.8 cu ft
Base Material
Canadian Sphagnum peat moss (75-85%/volume)
Inoculant
Mycorrhizae – endomycorrhizal fungi (Glomus intraradices)
Includes
Perlite, Vermiculite
Additive
Wetting Agent
pH Adjuster
Dolomitic and Calcitic limestone
Target Plant Type
Vegetables, Flowers, Houseplants
Season of Application
Spring, Summer
Features
- General purpose peat-based growing medium
- Enriched with beneficial mycorrhizae
- Promotes strong root development
- Excellent for potting and seed starting
- Supports a wide range of plants
- Good water retention
- pH balanced for optimal growth
What customers say
Pro Mix BX earns high marks for its exceptional quality and reliability. Users praise its consistent texture, which ensures optimal water retention and drainage, fostering robust root development. Many gardeners report superior growth across diverse plant types, attributing success to the included mycorrhizae. While the initial cost is notable, its dependable performance and potential for high yields establish it as a top choice. This substrate offers excellent long term value for serious growers seeking dependable results and vigorous plant health.
Know before you buy
The mycorrhizae are beneficial fungi that colonize plant roots to create a symbiotic relationship. This helps the root system absorb more water and nutrients, which typically leads to faster growth and better stress tolerance.
This mix is excellent for seed starting. Its fine, peat-based texture provides the consistent moisture and aeration that delicate seedlings need to establish their initial root systems.
PRO-MIX BX is a professional-grade growing medium that provides a stable, pH-balanced environment, but it does not contain a heavy starter fertilizer charge. You should begin a regular liquid feeding program shortly after your plants are established or once they develop their first true leaves.
The bale is compressed, so it is much denser than a standard bag of potting soil. Once you break it open and fluff it with water, it will expand to its full 3.8 cubic foot volume, which is enough to fill several large containers or a significant number of seed trays.
Yes, it is well-suited for houseplants. The inclusion of perlite and vermiculite ensures good drainage and aeration, which helps prevent the soil from becoming too compacted in indoor pots.
No, this is a soilless medium based on Canadian Sphagnum peat moss. This makes it lighter, more sterile, and more consistent than traditional garden soil, which helps reduce the risk of soil-borne diseases and pests.
Still have a question?
Ask Hayley anything about this product before you decide.