Trichoderma harzianum

Soil Inoculant & Biostimulant for Root Health, Soil Conditioning, and Plant Resilience

Trichoderma harzianum is a fast-colonizing, spore-forming beneficial fungus used as a microbial inoculant and biofertilizer to improve soil quality, stimulate root growth, and support natural plant defenses. Trusted in organic and conventional systems, this robust soil probiotic and plant-beneficial fungus enhances rhizosphere function, nutrient access, and stress tolerance under challenging field conditions. It is widely used in regenerative agriculture as a beneficial microbe for plants that promotes soil fertility and nutrient cycling.

Main Functions:

Root development and early vigor through natural hormone stimulation
Soil conditioning and structure improvement via organic matter decomposition
Nutrient solubilization and cycling including phosphorus, iron, nitrogen, and potassium
Supports natural plant defenses and resilience under biotic and abiotic stress
‍Promotes rhizosphere balance by enhancing beneficial microbial activity

Buy Now / Request Sample

Enhances Plant Defense Mechanisms

Trichoderma harzianum supports natural plant resilience by improving root health, microbial balance, and internal signaling pathways, including Induced Systemic Resistance (ISR).

Activates natural defense responses that help plants adapt to stress
Encourages immune-related enzyme production (e.g., peroxidase, PAL)
Strengthens root systems through beneficial rhizosphere interactions
Promotes microbial balance by competing for space and resources in the root zone

Improves Soil Structure and Health

Acts as a biological soil conditioner to enhance texture, moisture, and nutrient availability.

Breaks down organic matter to aid humus formation and aggregation
Produces natural binders that improve soil crumb structure and water retention
Supports nutrient retention by improving cation exchange and microbial activity
Balances soil microbiota for a resilient and biologically active root zone

Stimulates Root Growth and Early Plant Development

Promotes early vigor and nutrient access through hormonal and enzymatic pathways.

Produces phytohormones like auxins and gibberellins for strong root growth
Solubilizes key minerals, including phosphorus and micronutrients
Enhances nutrient uptake via active colonization of the rhizosphere

Increases Tolerance to Abiotic Stress

Helps plants withstand adverse environmental conditions.

Improves resistance to drought, salinity, and heat stress
Boosts antioxidant activity that protects plant cells under stress
Strengthens plant structure through improved cell wall integrity and metabolism

Enhances Nutrient Cycling and Mobilization

Improves nutrient availability and uptake efficiency.

Functions as a phosphate-solubilizing fungus to enhance phosphorus availability
Releases siderophores to improve iron (Fe) availability
Contributes to nitrogen mineralization via organic matter breakdown
Supports potassium mobilization through microbial activity in the rhizosphere

Boosts Photosynthetic Performance

Improves plant energy capture and growth potential.

Increases chlorophyll levels for better light absorption
Improves stomatal function for efficient gas exchange
Raises net photosynthesis rates, supporting stronger crop growth

Forms Biofilms for Rhizosphere Persistence

Ensures effective colonization and root-zone protection.

Establishes protective biofilms on plant roots for long-lasting presence
Creates physical and chemical barriers that improve rhizosphere health

Compatible with Sustainable Farming Practices

Ideal for use in organic farming and regenerative agriculture.

A trusted organic farming microbe and beneficial soil fungus, compatible with OMRI-listed inputs
Reduces reliance on chemical fungicides and soil amendments
Helps rehabilitate degraded soils and support long-term fertility

Why Choose Our Trichoderma harzianum?

High Spore Density for Root Colonization – Formulated at 50 billion CFU/g for rapid establishment in the rhizosphere and reliable biological activity under field conditions.
Multifunctional Fungal Biostimulant & Biofertilizer – Delivers broad-spectrum support for root development, nutrient mobilization, stress adaptation, and soil microbial balance.
Improves Soil Function and Resilience – Supports soil structure, organic matter breakdown, and water-holding capacity—ideal for improving long-term fertility and root-zone health.
Integrates Seamlessly into Biological Programs – Works in harmony with other microbial inoculants, biofertilizers, and beneficial soil microbes in regenerative and conventional systems.
Wide Applicability Across Cropping Systems – Used effectively in row crops, horticulture, hydroponics, orchards, nurseries, and turf management. Suitable for farm operators, input retailers, and agricultural distributors.
Reliable U.S. Fermentation Quality – Produced in our Wisconsin facility using controlled fermentation with a focus on spore viability, formulation purity, and long shelf-life under proper storage.

Applied Biotech Industries is a U.S. microbial fertilizers manufacturer and microbial inoculants supplier specializing in premium agricultural fungi and bacteria for crop performance and soil restoration.

Looking to buy microbial inoculants online or source bulk microbial inputs? Applied Biotech offers Trichoderma harzianum for sale in bulk, wholesale, and private-label formats. Contact us to request pricing, explore contract manufacturing, or order high-performance biofertilizers for sustainable soil management.

Concentration (CFU/g):

15 billion (1.5 × 10¹⁰ CFU/g) dry powder
Custom concentrations available upon request

Particle Size (Mesh):

Passes through 100 mesh sieve

Packaging Options:

22 lb (10 kg) pails
44 lb (20 kg) pails
340 lb (155 kg) drums
Smaller custom packaging available on request

Shelf-life:

6 months at room temperature
18 months if refrigerated

Storage Recommendations:

Store in a cool, dry location away from direct sunlight.
Reseal container tightly after each use.

Soil Application (Drip, Drench, or Fertigation)

Dosage:

100–200 grams per acre (250–500 grams per hectare)

Frequency:

Apply during early root establishment or transplanting
Reapply every 2–4 weeks depending on crop cycle and stress pressure

Application Method:

Dissolve thoroughly in water (ensure enough dilution volume to fully saturate the root zone)
Use an agitation tank or manual stirring to maintain microbial suspension
Apply through drip irrigation lines, micro-sprayers, or fertigation systems, positioning flow as close to the root zone as possible
Flush the system after application to prevent clogging or residue buildup
Do not tank mix with herbicides, fungicides, bactericides, or chemical pesticides

In-Furrow

Dosage:

25–50 grams per acre (60–125 grams per hectare)

Frequency:

Apply once at planting to target root initiation and early growth stages

Application Method:

Dissolve microbial powder thoroughly in water
Apply directly into the seed furrow or planting trench at seeding time
If using irrigation systems for delivery, ensure solution contacts the root zone
Maintain agitation to prevent settling

When tank-mixing with fertilizers:

Dilute fertilizer fully in water first before adding microbes
Do not mix with herbicides, fungicides, bactericides, or pesticides

Foliar Spray

Dosage:

50–100 grams per acre (125–250 grams per hectare)

Frequency:

Apply during vegetative growth or during periods of high stress or pest pressure
Reapply every 7–14 days during periods of high stress

Application Method:

Apply in the early morning or evening to reduce UV exposure
Use a non-ionic surfactant or wetting agent for improved adhesion
Ensure thorough coverage of foliage, including undersides of leaves
Agitate spray solution continuously during application

Seed Treatment

Dosage:

3–5 grams per kg of seed

Frequency:

Single application before planting

Application Method:

Mix thoroughly with a sticking agent (e.g., sugar solution, gum arabic)
Coat seeds evenly, ensuring full surface coverage
Allow seeds to dry gently in the shade before sowing

Compost or Organic Matter Amendment

Dosage:

20–40 grams per cubic meter of compost, organic substrate, or potting mix

Frequency:

Single application before use or at the beginning of composting/soil blending

Application Method:

For composting, first dissolve powder in water. Then spray piles and turn to evenly distribute product through the piles/windrows.
For organic matter amendment, evenly mix the dry microbial powder growing media during turning or mixing

Q: What is Trichoderma harzianum and why is it used in agriculture?

A: Trichoderma harzianum is a beneficial filamentous fungus widely used as a soil inoculant and biostimulant in crop production. It enhances rhizosphere function, supports nutrient dynamics, and promotes plant vigor by interacting with root systems and influencing soil microbial ecology.

Q: How does Trichoderma harzianum improve plant growth and resilience?

A: This microbial strain supports early plant development through natural hormone production, improved nutrient uptake, and enhanced root colonization. It also promotes systemic resilience to environmental stress by triggering natural plant defense signaling pathways.

Q: What packaging sizes does Applied Biotech offer for Trichoderma harzianum?

A: We supply Trichoderma harzianum in multiple formats for bulk and wholesale microbial fertilizer use:

10 kg (22 lb) pails
20 kg (44 lb) pails
155 kg (340 lb) drums

Each batch is formulated for high spore count, stability, and compatibility with agricultural delivery systems.

Q: Is Trichoderma harzianum suitable for all crop types?

A: Yes. It is widely used across broadacre crops, vegetables, orchards, vineyards, greenhouse systems, and regenerative operations. It adapts well to a variety of soil types and production models.

Q: What is the best way to apply Trichoderma harzianum in the field?

A: Application methods include in-furrow at planting, drip fertigation, seed coating, root dips, or soil drenches. It is most effective when applied early in the crop cycle to support root colonization and establish beneficial rhizosphere interactions.

Q: Can Trichoderma harzianum be used in certified organic systems?

A: Yes. Trichoderma harzianum is a naturally occurring, non-GMO organism commonly used in organic and regenerative agriculture. Always verify product compatibility with your organic certifier prior to use.

Q: Is this strain compatible with other microbial or nutritional inputs?

A: Generally yes. Trichoderma harzianum can be co-applied with many other soil microbes, humic substances, and biostimulants. Avoid mixing with fungicides or chemical treatments unless compatibility has been tested.

Q: How does this product affect soil structure and fertility?

A: Trichoderma harzianum contributes to soil conditioning by breaking down organic residues, promoting aggregate stability, and improving moisture retention. It also supports nutrient cycling and cation exchange through microbial activity.

Q: Does Trichoderma harzianum offer shelf stability for storage and transport?

A: Yes. As a spore-forming fungus, it maintains long-term viability under proper storage conditions. Our formulation remains effective for up to 12 months when stored in a dry, cool place away from direct sunlight.

Q: Where can I buy microbial inoculants or order Trichoderma harzianum?

A: You can order Trichoderma harzianum online through our website or contact us for direct sales, bulk supply, or private-label programs. We ship domestically and internationally.

Q: Does Applied Biotech offer this strain under private-label programs?

A: Absolutely. We manufacture and supply bulk and private-label solutions to distributors, manufacturers, and agribusinesses seeking high-quality microbial inputs for soil health, biostimulation, or custom formulations.

‍

Safety Data Sheet (SDS)

1. Growth Promotion in Maize Inoculated with Trichoderma harzianum

🔗 Read the study

Key Findings:

Trichoderma harzianum inoculation enhanced vegetative growth in maize.
Improved nutrient uptake and biomass accumulation were observed.
Demonstrated potential as a biofertilizer in maize cultivation.

2. Solubilization of Phosphate and Micronutrients by Trichoderma harzianum and Its Relationship with the Promotion of Tomato Plant Growth

🔗 Read the study

Key Findings:

T. harzianum strain SQR-T037 enhanced uptake of phosphorus, iron, copper, and zinc in tomato plants.
The fungus solubilized sparingly soluble minerals through mechanisms like acidification and chelation.
Inoculation led to significant increases in plant biomass and nutrient content.

3. Application of Trichoderma harzianum Enhances Salt Tolerance and Growth in Wheat

🔗 Read the study

Key Findings:

T. harzianum application improved wheat growth under salt stress conditions.
Enhanced antioxidant activity and nutrient uptake were observed.
Demonstrated potential in mitigating abiotic stress in crops.

4. Enhancement of Soil Aggregate Stability and Organic Matter Decomposition by Trichoderma harzianum

🔗 Read the study
Key Findings:

T. harzianum accelerated decomposition of plant residues and improved soil aggregation.
Boosted microbial activity and humus formation, enhancing soil structure and fertility.
Supports its classification as a biological soil conditioner.

5. Trichoderma harzianum Application Increases Cucumber Yield in Unheated Glasshouse

🔗 Read the study

Key Findings:

Application of T. harzianum resulted in a significant increase in cucumber yield under unheated glasshouse conditions.
Improved plant growth parameters, including shoot length and leaf area, were noted.
Enhanced photosynthetic efficiency and water use efficiency contributed to better plant performance.

6. Trichoderma harzianum Enhances Nutrient Uptake and Growth in Pepper Plants

🔗 Read the study

Key Findings:

Inoculation with T. harzianum significantly improved growth and nutrient uptake in pepper plants.
Enhanced chlorophyll content, photosynthetic rate, and overall plant biomass were observed.
Effects attributed to improved nutrient availability and hormonal stimulation.

7. Contribution of Trichoderma harzianum to Organic Carbon Cycling in the Rhizosphere

🔗 Read the study

Key Findings:

T. harzianum stimulated decomposition of root exudates and enhanced microbial respiration.
Increased labile carbon pools and supported nutrient turnover in the rhizosphere.
Confirms its role in soil fertility and carbon cycling in agroecosystems.

8. Influence of Trichoderma harzianum on Seed Germination and Early Seedling Development of Rice

🔗 Read the study

Key Findings:

Application of T. harzianum increased seed germination rate, shoot length, and root vigor in rice.
Attributed to enhanced hormone production and early root colonization.
Demonstrates biostimulant potential for cereal crop establishment.

Trichoderma harzianum