SPAWN MATE SUPPLEMENTS

Get More From Every Flush

Basic compost only goes so far. Once the easy nutrition is gone, your later flushes fade fast. Spawn Mate supplements put more fuel in the compost so your third and fourth flushes stay commercially viable.

OMRI options available. US only.

Why Supplements Matter: The problem with standard compost.

Every batch of compost has a fixed amount of nutrition. Mushrooms burn through it fastest in the first two flushes. By the third, the easy-to-digest nutrients are gone. That’s when yields drop and margins shrink.

A high-performance supplement adds protein and nutrients in the right form so your compost keeps producing longer.

Growers using Spawn Mate supplements typically see biological efficiency gains of 10-20% or more compared to just compost. Results vary depending on compost quality, application rate, and growing conditions.

HOW IT WORKS

The science behind delayed release.

Timing matters for supplements. In compost, raw materials are consumed fast. That causes thermogenesis, a heat spike that can damage the crop and create conditions for green mold to take hold.

Spawn Mate supplements are denatured or coated so nutrients release slowly as the mushroom grows. Mycelium gets steady, controlled energy. Everything stays at the right temperature. Later flushes stay consistent.

CHOOSING THE RIGHT SUPPLEMENT

Protein Level Drives Performance

Most Spawn Mate supplements are defined by their protein concentration. Protein provides the nitrogen and energy mushrooms need to build dense, heavy caps.

The right level depends on compost, substrate, and market.

Spawn Mate offers options from 27% protein up to 58%. OMRI-certified formulations are available across the range.

Promycel Gold

54% Protein

The benchmark. 54% protein with balanced lipids and carbohydrates. Delayed-release formula that protects compost temperature while delivering a consistent nutritional boost across every flush. The established standard for yield stimulation and economic return.

PG Natural 2.0

54% Protein

Same nutritional profile as Promycel Gold, no chemical treatment.

Titanium

48% Protein

48% protein with inorganic compounds and delayed-release delivery. Formulated to resist competitor fungi including Trichoderma green mold. Protects the crop while fueling it.

SMO PRO 2.0

48% Protein

Inorganic components and animal protein for steady, controlled colonization.

SMO PRO 58

58% Protein

OMRI listed, high-potency formulation for certified organic farms.

OMRI Listed

SM 25

58% protein

Multi-nitrogen source formula. Faster thermal response during spawn run.

TBS

41% Protein

Plant and animal protein blend. Economical baseline nutrition for general production.

Spawn Mate II SE

27% Protein

Low protein content designed for specialty crops, including oyster mushrooms and other non-Agaricus varieties.

AmaizePro CGM

USA-manufactured nutritional additive composed of corn gluten meal and organic soybean oil. Lowmoisture content. High-protein nutrient base. Specialized mold inhibitor. Higher mushroom yields and consistency.

AmaizePro CGM, (Pending OMRI Review and Approval)

Launching Summer 2026. Contact your rep for availability.

When to Apply

At Spawning

Mix into the compost at the same time as the spawn. Supplements the compost from the first day of colonization and builds nutrition for all flushes.
At Casing

Add during the casing stage for a late-stage nutritional boost. Some growers use a split approach.