Pro-Mix
PRO-MIX HP Chunk Coir Mycorrhizae
Best high-drainage medium for water-sensitive plants and delicate cuttings.
PRO-MIX HP-CC MYCORRHIZAE™ is a premium, lightweight growing medium designed for optimal plant development. Its high-porosity peat base, enriched with chunk coir, ensures excellent aeration and drainage, making it ideal for water-sensitive plants and rooting cuttings. This formula includes beneficial mycorrhizae (Glomus intraradices) that enhance nutrient and water absorption, promoting robust root colonization and overall plant vitality. Suitable for a wide array of horticultural applications, it supports vigorous growth even in low-light conditions.
$13.74
Owner Satisfaction
4.7
/ 5
Category Rank
11
/ 1247
#11 in Soil
Price vs Category Average
-73%
Below average
Weight
82.5
/ lbs
Who it's for
- Gardeners prone to overwatering their sensitive houseplants
- Growers seeking maximum plant vigor and nutrient efficiency
- Busy plant parents needing a forgiving irrigation schedule
Who should skip it
- Beginners who prefer a self-fertilizing, low-maintenance potting mix
- Indoor gardeners sensitive to dust or limited by physical strength
- Budget-conscious hobbyists looking for affordable bulk soil
Performance breakdown
Aeration capacity
High-porosity structure prevents root suffocation in moisture-sensitive plant varieties.
Drainage efficiency
Chunk coir integration ensures rapid water movement through the root zone.
Root colonization
Active mycorrhizae additives significantly accelerate early-stage root system development.
Structural stability
Coarse texture resists compaction over long-term indoor growing cycles.
Nutrient uptake
Biological amendments optimize mineral absorption for more vigorous plant growth.
Handling ease
Heavy 82-pound bale requires significant effort to transport and store.
Key Specs
Weight
82.5 lbs
Volume
3.8 cu ft
Soil Type
Potting Mix
Texture
Chunky
Drainage Level
Fast Draining
Primary Amendments
Coconut Coir, Mycorrhizae
Intended Use
Potting, Seed Starting
Features
- High porosity for superior aeration
- Chunk coir enhances drainage
- Ideal for water-sensitive crops
- Supports successful rooting of cuttings
- Mycorrhizae boost nutrient uptake
- Promotes healthy root development
- Optimized for low-light conditions
- Versatile for many plant types
What customers say
Customers highly value the superior quality and dependable reliability of PRO MIX HP Chunk Coir. Its structure, featuring high porosity and chunk coir, delivers exceptional drainage and aeration crucial for robust root development. Users consistently observe vigorous plant growth, appreciating the professional grade consistency of the medium. Although priced at a premium, consumers find the enhanced performance and trustworthy results fully justify the investment. This makes it a preferred choice for growers prioritizing maximum plant health and dependable outcomes.
Know before you buy
High porosity means the mix contains larger air pockets, which prevents the soil from becoming overly compacted. This allows roots to breathe more easily and helps prevent root rot in water-sensitive plants.
Yes, the inclusion of chunk coir and the high-porosity structure make it an excellent choice for seed starting and rooting cuttings. It provides the necessary drainage to prevent seedlings from sitting in stagnant water.
Mycorrhizae are beneficial fungi that form a symbiotic relationship with plant roots. They effectively extend the root system, allowing your plants to absorb water and nutrients more efficiently.
Because it is designed for fast drainage, you may find that you need to water slightly more frequently than you would with a denser, peat-heavy mix. It is specifically formulated to balance moisture retention with oxygen flow, making it ideal for plants that dislike 'wet feet.'
This mix is highly versatile and works well for a wide array of plants, especially those that are prone to root rot or require excellent aeration. However, if you are growing moisture-loving tropicals that prefer to stay constantly damp, you may want to monitor your watering schedule closely.
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$14