Ultimate ½ Pint Substrate Jars (12-Pack) – Midwest Grow Kits

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Ultimate ½ Pint Substrate Jars (12-Pack)

(263)
$3799
Taxes, discounts and shipping calculated at checkout.
12-pack of sterile ½ pint jars filled with our Ultimate substrate blend: organic BRF, vermiculite, mineral water, worm castings, and bee pollen. Pre-drilled, pressure sterilized, and made fresh to order.


Description

Ultimate ½ Pint Substrate Jars (12-Pack)

Freshly Made • Sterile • Fastest Colonization on the Market

(ON SALE!)
After over 15 years of refinement, we’ve perfected the art of substrate jars. Our Ultimate 8oz substrate jars are trusted by growers across the country for their consistent results, unbeatable colonization speed, and superior yield potential. This isn’t just another PF Tek jar—it’s a carefully balanced formula of:

  •     Organic Brown Rice Flour
  •     Vermiculite
  •     Mineral Water
  •     Liquid Worm Castings
  •     Bee Pollen

Each jar features four pre-drilled holes in the lid for easy inoculation and a top dry layer of vermiculite for contamination protection. We use Ball® 100% glass canning jars—never cheap plastic alternatives.


Why Choose Our Ultimate Jars?

  •     Fastest Colonization Times – Ideal nutrient balance promotes rapid, even growth
  •     Larger Yields – Formulated to produce healthy, robust mushrooms
  •     Sterilized to Perfection – Pressure sterilized for 120 minutes in our autoclave
  •     Pre-Drilled & Ready – Just add your favorite spore syringe or liquid culture
  •     Handmade Fresh – Each jar is made the same morning your order ships

No guesswork. No corners cut. Just reliable jars that outperform anything else on the market.


Included:

  •     12x 8oz Ultimate Substrate Jars (½ pint size)
  •     Lids with 4 pre-drilled holes
  •     Sterile, ready-to-inoculate jars with dry vermiculite top layer

 

**Click here to read our update page about national canning jar shortages and pricing**

Customer Reviews

Based on 263 reviews
95%
(250)
4%
(10)
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(3)
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T
Theodore
Excellent product

Excellent product, super fast shipping, great packaging. Ordering from Midwest is a delight, no BS just great products and shipping.

B
Brandon Bickford
Trustworthy and easy

Came quick too ! Defiantly recommend Midwest grow kits

B
Brandon Bickford
Trustworthy and easy

Came quick too ! Defiantly recommend Midwest grow kits

K
Katie
Review

Love these. Quick and easy and they look so cute. 100% recommend.

K
KD
One jar arrived broken but still a 5-star product!

These have been very reliable, I know exactly what I?m getting every time I order this package. Shipping speed is so consistent every time, it?s been easy to plan around expected arrival time.

This batch were shipped only a bit looser than I?ve received in the past & upon checking each lid for tightness, I did find one jar completely cracked in half? but I was grateful it was only one! A couple others looked a slightly disturbed but not enough to worry, top verm layer looks intact. The shipping carrier/delivery driver easily could have been to blame in handling the box recklessly, so these jars & Midwest still get 5 stars from me