Midwest's Wild Horse Bulk Substrate Manure Booster – Midwest Grow Kits

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Midwest's Wild Horse Bulk Substrate Manure Booster

(60)
$599
Taxes, discounts and shipping calculated at checkout.
Premium wild horse manure booster to enhance bulk mushroom grows—fully pasteurized, ready to mix, and optimized for monotub success.


Description

Midwest’s Wild Horse Bulk Substrate Manure Booster

Supercharge your bulk substrate with our most potent additive yet—Wild Horse Booster, a commercial-grade manure-based enhancer designed to increase mushroom size, improve flavor, and boost yield. Each 1 lb bag comes fully hydrated, vacuum sealed, and ready to mix with your bulk casing for incredible results using the monotub method or any bulk fruiting setup.

Why It Works

We’ve sourced wild horse equine manure from Northern Nebraska & Wyoming, known for its high nitrogen and organic content. Combined with a custom blend of vermiculite, pH stabilizers, spring water, and essential minerals, this booster hits the perfect field capacity every time.

To ensure maximum cleanliness and safety, each bag is processed using our liquid immersion pasteurization system—a 2.5-hour treatment that eliminates harmful bacteria while preserving beneficial microbes essential for healthy fruiting conditions.

Key Ingredients (Fully Pasteurized & Hydrated):

  •     Wild Horse Manure (Northern Nebraska & Wyoming)
  •     Vermiculite (moisture retention)
  •     Spring Water
  •     Gypsum & Hydrated Lime (pH buffers)
  •     Proprietary Mineral Blend

Easy Application

  •     Mix ½ bag of Wild Horse Booster per 5 lbs of Select Bulk Casing Mix
  •     Use in the bottom layers of your monotub or tray
  •     Top with ½ inch of regular casing mix for best results
Common Mix Ratios:
  •     1 Spawn Bag + 1 Bag Select Casing + ½ Bag Wild Horse Booster
  •     2 Spawn Bags + 2 Bags Select Casing + 1 Bag Wild Horse Booster
  •     3 × 30oz Grain Jars + 2 Bags Select Casing + 1 Bag Wild Horse Booster
Storage & Shelf Life
  •     Use within 90 days for best results
  •     Store in the refrigerator (do not freeze)

Whether you're a beginner trying your first bulk grow or a commercial cultivator scaling your yields, Midwest’s Wild Horse Booster is a proven way to give your mushrooms the nutrients they need to thrive.

Customer Reviews

Based on 60 reviews
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A
Austin
Stinky but it works!

I usually split this in to two 44q fruiting chambers and I think it helps my yields. Since I started using it I feel like it has helped my grows. Only down side is it will make your room smell like s**t for a little bit.

B
Brian
Great product

Great fertilizer

N
Nikalip10
This stuff is amazing

This is an excellent addition to add to CVG. I added one pack to 10 pounds of CVG. I put grain in substrate and it literally fully colonized with in 5 days and I had fruit within two weeks. I am so impressed and will definitely purchase again

t
tck
on time and good to go

Arrived on time and packed appropriately. Ready to use immediately, not dry or moldy or punctured.

K
Keoki
Powerful

It's REAL and real powerful. Great product.