Comparison: Best Promix Mycorrhizae Soil (Updated | Nov 11th)
But with so many options out there, how do you know which one delivers real results? We’ve dug deep—literally—to compare the top contenders, looking at mycorrhizal content, soil texture, and overall performance. Let’s find the perfect Promix match for your green dreams.
- Best for high-porosity grower: Premier Horticulture 2028130RG PRO-Mix HP-CC Mycorrhizae High Porosity Grower Mix
- Best for bx bulk mix: Pro-Mix BX Mycorrhizae Growing Mix 3.8 sq. ft.
- Best for coir-enhanced aeration: Premier Horticulture 713425 HP-CC Mycorrhizae Pro-Mix
- Best for convenient grow bag: PRO-Mix HP MYCORRHIZAE Open Top Grow Bag – 1cu ft – Loose Fill Open Top Grow Bag
- Best for compact hp mix: Premier Pro-Mix HP Mycorrhizae 2.8 cu ft Loose Fill (1)
- Best for biofungicide boost: PREMIER HORTICULTURE Inc 2038500RG 3.8CF Pro Mix HP Biofungicide and Mycorrhizae Soil-amendments
- Best for standard hp mix: PREMIER HORTICULTURE Premier Pro-Mix HP Mycorrhizae 2.8 cu ft Loose Fill (3)
- Best for organic seed starter: Promix Premier Horticulture Organic Pro Seed Starting Mix; 16 qt with My Garden Pool PH Soil Test Strips 20 ct
- Best for high-concentration inoculant: Myco Bliss Powder (1lb) – Mycorrhizal Fungi for Soil – 5 Strain Mycorrhizal Inoculant with 1000 Propagules Per Gram – Highly Concentrated Mycorrhizae for Plants
- Best for general purpose bx: Premier Horticulture Pro-Mix BX Mycorrhizae General Purpose Grower Mix
Product Comparison: Best Promix Mycorrhizae Soil
Premier Horticulture 2028130RG PRO-Mix HP-CC Mycorrhizae High Porosity Grower Mix, 2.8 cu. ft.
- Premier b10281rg Pro mix loose with mycorrhizae, 2.8 cubic feet by premier horticulture
- 2-4/5-cubic feet
- Optimum growth
Pro-Mix BX Mycorrhizae Growing Mix 3.8 sq. ft.
- 4910381 MIX PLANT GROW 3.8CUFT
Premier Horticulture 713425 HP-CC Mycorrhizae Pro-Mix, 3.8 cu ft.
- PRO-MIX hp-cc mycorrhizae is a lightweight, high-porosity peat-based growing medium that contains chunk coir
- 5 and 5 gallon buckets
- They are mesh on the sides and bottom for maximum aeration
- Lightweight, high-porosity peat-based growing medium that contains chunk coir
- Ensures optimum growth, especially when high air capacity and extra drainage are required
- Ideal for water-sensitive crops, rooting cuttings and/or low-light growing conditions
- Its very easy and elegant to use
PRO-Mix HP MYCORRHIZAE Open Top Grow Bag – 1cu ft – Loose Fill Open Top Grow Bag
- PRO-MIX HP MYCORRHIZAE Open Top Grow Bag – 1cu ft – Loose Fill Open Top Grow Bag
- Ideal for producers seeking a clean growing solution that saves time and money for efficient cultivation. The formulation of fibrous peat moss and coarse perlite ensures superior plant growth and yields, with the added convenience of all-in-one grow bags. Enhanced with MYCORRHIZAE to expand root system and increase resistance to stress.
Premier Pro-Mix HP Mycorrhizae 2.8 cu ft Loose Fill (1)
- B07MZHV6GV
PREMIER HORTICULTURE Inc 2038500RG 3.8CF Pro Mix HP Biofungicide and Mycorrhizae Soil-amendments, 3.8 cu ft, Natural
- High porosity peat-based growing medium
- Ensures optimum growth, especially when high air capacity and extra drainage are required
- Contains Mycorrhizae, a beneficial endomycorrhizal fungus that increases resistance to stresses
PREMIER HORTICULTURE Premier Pro-Mix HP Mycorrhizae 2.8 cu ft Loose Fill (3)
Promix Premier Horticulture Organic Pro Seed Starting Mix; 16 qt with My Garden Pool PH Soil Test Strips 20 ct, and Gardening Claw Gloves and Garden-IQ, Smart Gardening AI Assistant!
- 🌿Organic and All-Natural Ingredients: Carefully selected to provide your seeds with a healthy, chemical-free start.
- 🌱Enriched with Mycorrhizae: For enhanced nutrient and water absorption, promoting stronger root development and plant growth.
- 🧪Easy pH Monitoring: Comes with 20 pH soil test strips for optimal soil condition management.
- 🌻Versatile Use: Ideal for a wide range of plants, ensuring your garden’s diverse needs are met.
- 🌱Promotes Healthy Seeds: Specially formulated to encourage vigorous seed germination and growth.
- 🌿Eco-Friendly Packaging: Committed to sustainability, our packaging is designed to minimize environmental impact.
- 🧠 Garden-IQ, Smart Gardening AI Assistant: Get smart advice and solutions tailored to your gardening needs.
- 🧤Superior Gardening Claw Gloves: In addition to the fertilizer and pH test strips, this package also includes My Garden Pool Superior Gardening Claw Gloves, offering maximum protection and comfort for your hands while working in the garden.
Myco Bliss Powder (1lb) – Mycorrhizal Fungi for Soil – 5 Strain Mycorrhizal Inoculant with 1000 Propagules Per Gram – Highly Concentrated Mycorrhizae for Plants, Potting Soil, & Garden Soil
- Mycorrhizal Fungi Inoculant for Plants – Myco Bliss contains 5 high performing strains of mycorrhizal fungi that form powerful symbiotic relationships with plant roots, drastically improving nutrient absorption and water retention in indoor plants, outdoor plants, and potting mixes. (Mycorrhizae powder can be applied directly to seeds and developing roots.)
- Super Concentrated Mycorrhizae – Myco Bliss is a powerful mycorrhizal inoculant for plants, boasting 1,000 propagules per gram and treating up to 100 plants per pound. Don’t fall for others trying to sell you lifeless powder in a bag – Myco Bliss is a highly concentrated formula with zero weak propagules, giving you efficient results for potting soil and garden soil.
- Retains Water & Nutrients – Using mycorrhizal fungi for plants helps them absorb water and nutrients they can’t normally access. Thanks to its excellent moisture retention, mycorrhizal rooting powder stores water and nutrients when it’s dry or humid, so you can rest assured knowing your plants are staying happy and hydrated.
- Improves Resistance to Abiotic Stress – As bonds form between plant roots, Myco Bliss alleviates transplant shock and improves nutrient uptake to protect against abiotic stress. Plus, mycorrhizal powder helps protect against drought, salinity, and acidity, making Myco the perfect soil inoculant for beans and peas, garden containers, garden pots, lawns, flower beds, and other fertilizers.
- Reduces Fertilizer Dependency – Our mycorrhizal for plants is made with no synthetic ingredients, making mycorrhizae fertilizer a cost-effective and sustainable solution for boosting nutrient absorption and drought tolerance. Because it helps with nutrient uptake, Myco Bliss reduces dependency on other garden fertilizers, saving you time, money, and hassle.
Premier Horticulture Pro-Mix BX Mycorrhizae General Purpose Grower Mix, 2.8CF (3 Pack)
- You will receive 3 bags per order
- 80% Canadian sphagnum peat moss, 15% perlite, and 5% vermiculite
- Great for transplanting
- Provides moisture balance and nutrient retention
- Made in the USA
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Buying Guide
FAQs
How do I choose the right volume (cu ft) of Pro‑Mix for my gardening project?
Start by estimating the total planting area and the depth of media you need; a 2.8 cu ft bag typically covers about 1 sq ft at 3 in depth, while a 3.8 cu ft bag reaches roughly 1.3 sq ft. For larger beds or multiple containers, buying a bulk 5‑gallon bucket can be more economical and reduces the number of bags you have to handle. Consider future expansion—extra mix can be stored for later use without losing its mycorrhizal activity.
What are the main differences between Pro‑Mix HP‑CC and Pro‑Mix BX formulations?
HP‑CC (High Porosity – Coir) blends peat moss with chunk coir and a higher proportion of perlite, delivering superior aeration and drainage for root‑heavy crops. BX (General Purpose) contains a balanced mix of peat, perlite, and vermiculite, making it versatile for transplanting and seedling work. Both are inoculated with mycorrhizae, but HP‑CC is better suited for plants that demand extra oxygen, such as tomatoes and peppers.
Is there a benefit to using the open‑top grow bag versus a loose‑fill bag?
Open‑top grow bags combine the convenience of a pre‑filled container with excellent airflow, thanks to their mesh sides and bottom, which helps prevent root rot. Loose‑fill bags give you flexibility to fill any container size but require extra handling and a separate container for planting. If you want a ready‑to‑plant solution that saves time and reduces mess, the open‑top bag is often the better choice.
How does the added mycorrhizae inoculant improve plant performance compared to a plain peat mix?
Mycorrhizae form a symbiotic network with plant roots, extending the root surface area and allowing more efficient uptake of phosphorus, micronutrients, and water. This results in faster early growth, higher yields, and increased resilience to drought, salinity, and transplant shock. Plain peat mixes lack this biological boost, so plants may need more fertilizer and irrigation to achieve similar results.
Are the mesh‑lined buckets of the 3.8 cu ft Pro‑Mix HP‑CC better for aeration than standard bags?
Yes, the mesh lining provides additional ventilation on the sides and bottom, promoting uniform air exchange throughout the medium. This design reduces the risk of compacted zones that can limit root respiration, especially in larger containers. Standard woven bags still work well, but the mesh buckets give a measurable edge for high‑demand crops.
When should I consider a dedicated mycorrhizae powder like Myco Bliss instead of pre‑inoculated mixes?
If you already have a preferred growing medium or are customizing blends (e.g., adding compost or specialized fertilizers), a powder lets you inoculate exactly the amount you need. Myco Bliss offers a high concentration of five fungal strains, providing flexibility for large gardens or treating up to 100 plants per pound. Pre‑inoculated mixes are convenient for quick setups, but the powder is more cost‑effective for repeated or large‑scale applications.
How does the organic seed‑starting mix with My Gard differ in nutrient profile from the standard Pro‑Mix HP‑CC?
The seed‑starting mix is formulated with all‑natural, low‑nutrient peat and a lighter texture to avoid overwhelming delicate seedlings, while still containing mycorrhizae for early root development. Pro‑Mix HP‑CC includes additional coir and perlite, giving it a higher nutrient holding capacity suited for established plants. For germination, the organic mix promotes strong, healthy seedlings; once they outgrow the tray, transitioning to HP‑CC provides the extra support they need.
What value considerations (price per cu ft, reusability) should I weigh when buying bulk versus smaller packages?
Bulk containers such as 5‑gallon buckets usually lower the cost per cubic foot and reduce packaging waste, making them a good long‑term investment for serious growers. Smaller 1‑cu ft bags or open‑top grow bags are convenient for hobbyists or limited space, but the price per unit is higher and you may end up buying more than you need. Also factor in storage—loose‑fill mixes can be kept in sealed bins for months, whereas pre‑filled bags may degrade if left exposed to moisture.