Case Study

China Green Pepper Trial: 147% Yield Increase Without Fertilizer Using Multi-Strain Trichoderma

In a China green pepper trial on poor soil with no fertilizer, Multi-Tricho multi-strain Trichoderma raised yield 147%, from 63 grams per plant in the untreated control to 156 grams per plant, alongside visibly stronger roots and thicker foliage.

147%
more yield, no fertilizer
156 g
per plant vs 63 g
0
fertilizer applied

Results at a glance

MetricUntreated controlMulti-Tricho treated
Yield per plant63 g156 g (+147%)
Fertilizer usedNoneNone
Root massReducedSignificantly greater
Foliage and growthThin, slowThicker, stronger

The challenge

The peppers in this China trial grew on poor, low-activity soil, with no fertilizer at any point in the season. Soil like that releases nutrients slowly and makes it hard for young roots to establish, so it is a real test of what soil biology does for yield on its own. Control plants grew in the same soil, on the same watering, with no inoculant, which left Multi-Tricho as the only thing separating the two groups.

What we did

Multi-Tricho went on evenly across the soil surface, watered in, then reapplied once a month through the season. It is an OMRI Listed inoculant built from three Trichoderma species, Trichoderma harzianum, Trichoderma longibrachiatum, and Trichoderma asperellum, that colonize the root zone and root surfaces. There they break down organic matter and free up nutrients for the plant to take back up, so the crop gets more out of the soil it is already growing in. The control plants got none of it.
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Untreated control on poor soil with no fertilizer: thin foliage, weak roots, and 63 grams of green peppers per plant at harvest.
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Untreated control on poor soil with no fertilizer: thin foliage, weak roots, and 63 grams of green peppers per plant at harvest.

Same poor soil and no fertilizer, plus Multi-Tricho multi-strain Trichoderma: thicker leaves, greater root mass, and 156 grams per plant, a 147% yield gain.

Same poor soil and no fertilizer, plus Multi-Tricho multi-strain Trichoderma: thicker leaves, greater root mass, and 156 grams per plant, a 147% yield gain.

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At two months, the Multi-Tricho plants on the left stand taller and fuller than the untreated control on the right, grown side by side in the same poor soil with no fertilizer.
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At two months, the Multi-Tricho plants on the left stand taller and fuller than the untreated control on the right, grown side by side in the same poor soil with no fertilizer.

The results

At harvest the treated plants produced 156 grams of peppers each, against 63 grams in the control. That is a 147% increase with no fertilizer behind it. They also built heavier roots and thicker foliage, which is what let them pull more out of thin soil. For a grower on marginal or organic ground, that is the point worth noting: the yield came from soil biology, not from a bigger fertilizer bill, which is where a multi-strain Trichoderma inoculant earns its place in organic and low-input programs.

The data

Green pepper yield per plant
g
63
156
147% more yield, from 63 g untreated to 156 g with Multi-Tricho, no fertilizer
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Download the complete case study (PDF)

Frequently asked questions

Does Trichoderma increase crop yield?

In this trial it did. Green pepper plants treated with a multi-strain Trichoderma inoculant produced 156 grams per plant versus 63 grams for untreated controls, a 147% yield increase, with no fertilizer on poor soil. Trichoderma builds yield indirectly, by colonizing the root zone, improving nutrient cycling, and strengthening root systems so plants capture more of the nutrition already in the soil.

What is a multi-strain Trichoderma inoculant?

It is a soil inoculant that delivers several complementary Trichoderma species instead of one. Multi-Tricho combines Trichoderma harzianum, Trichoderma longibrachiatum, and Trichoderma asperellum, beneficial soil fungi that colonize roots and the surrounding rhizosphere. Using multiple strains widens the range of soils and conditions the inoculant performs well in.

How does Trichoderma work in the soil?

Trichoderma fungi colonize root surfaces and the rhizosphere, where they produce enzymes and metabolites that recycle nutrients and break down organic matter. They compete for space and resources in the root zone and support a balanced soil microbiome, which strengthens root development and helps plants establish and hold up under stress.

Can Trichoderma replace fertilizer?

This trial applied no fertilizer at all, and the treated plants still delivered a 147% yield gain on poor soil. Trichoderma is not a nutrient source itself; it improves how efficiently plants use the nutrients already in the soil, which lowers fertilizer dependence and suits organic and low-input programs. On richer soils growers typically pair it with a reduced fertility program.

Is Trichoderma harzianum good for plants?

Trichoderma harzianum is one of the most widely used beneficial soil fungi in agriculture, valued for root colonization and rhizosphere activity. In Multi-Tricho it works alongside Trichoderma longibrachiatum and Trichoderma asperellum, and the blend produced stronger roots and a large yield gain on green peppers in this trial.

How do you apply Trichoderma to pepper plants?

In this trial Multi-Tricho was spread evenly across the soil surface, watered in, and reapplied once a month through the season. Applying to moist soil and keeping the root zone active helps the fungi establish. Rates scale from pots and greenhouse beds up to open-field production.

Is Multi-Tricho OMRI Listed for organic growing?

Yes. Multi-Tricho is OMRI Listed, so it fits certified organic and regenerative systems. It uses naturally occurring Trichoderma strains and integrates with organic fertility programs, which makes it a practical biological input for organic pepper and vegetable production.

Which crops benefit from a Trichoderma soil inoculant?

Trichoderma inoculants support a wide range of crops, including peppers and other vegetables, fruit, row crops, and turf. The benefit is largest on marginal or low-fertility soils and in stress conditions, where stronger roots and better nutrient cycling translate most directly into growth and yield.

multi-tricho

Product used in this trial

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Trial vs control

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