Refill Kits

Refill your shoeboxes and monotubs with premium CVG substrates and ready-to-go grainbags. We make restocking easy with high-quality materials for optimal growth and fast results.

Featured collection

View all

Let customers speak for us

from 616 reviews
High-Quality Gypsum Powder - Essential for Mushroom Cultivation & Soil Health
Q.P.

10/10

High-Quality Gypsum Powder - Essential for Mushroom Cultivation & Soil Health
Coco Coir Brick 10lb
Q.P.

Quality products, fast shipping!

Coco Coir Brick 10lb
Low Nutrient Agar for Fungi Culturing – Sterile, High-Quality Media
R.G.M.

Great quality plates.

Low Nutrient Agar for Fungi Culturing – Sterile, High-Quality Media
MYA Agar for Fungi Culturing – Sterile, High-Quality Malt Yeast Agar
R.G.M.

Very nice plates.

MYA Agar for Fungi Culturing – Sterile, High-Quality Malt Yeast Agar
3lb Mushroom Corn Sterile Grain Bag
R.G.M.

Great quality product and fast shipping

3lb Mushroom Corn Sterile Grain Bag
2 Pack of 3lb Milo Sorghum Sterile Grain Bags
Scott

Great bang for your buck! I’ve started using these exclusively getting great results with a much fairer price! Highly recommend.

2 Pack of 3lb Milo Sorghum Sterile Grain Bags
Simple Mushroom Substrate - Ready-to-Use CVG/CVA Mix for Beginners
Leroy

Quick delivery at a great price!

Simple Mushroom Substrate - Ready-to-Use CVG/CVA Mix for Beginners
2 Pack of 3lb Milo Sorghum Sterile Grain Bags
Leroy

Quick delivery. Inoculated first bag so we’ll see but so far so good!!!

2 Pack of 3lb Milo Sorghum Sterile Grain Bags
2 Pack of 3lb Milo Sorghum Sterile Grain Bags
Jessica

Thank you for providing me with a great product.

2 Pack of 3lb Milo Sorghum Sterile Grain Bags
12qt Shoebox Refill Kit | Mushroom Substrate and Grain
Jeremy Heaston
1st corn grow

I been using Milo and rye grain mostly and decided to try corn, I got the 5lb bag. Spawn was very sturdy, clean and strong, worked very well.

12qt Shoebox Refill Kit | Mushroom Substrate and Grain
MYA Agar with Carbon – Enhanced Malt Yeast Agar for Mushroom Cultures
Jen

Clean nicely wrapped very potent thank you

MYA Agar with Carbon – Enhanced Malt Yeast Agar for Mushroom Cultures
Drippy Corn Mushroom Grain Spawn
Toby Shores
Superior Company

Top of the line service and support quality , two things that is getting harder and harder to find! Thanks guys I'll buy again!!

Drippy Corn Mushroom Grain Spawn
2 Pack of 3lb Milo Sorghum Sterile Grain Bags
Devon

Everything I've gotten from them has been amazing just wish they sent different stickers lol

2 Pack of 3lb Milo Sorghum Sterile Grain Bags
Low Nutrient Agar for Fungi Culturing – Sterile, High-Quality Media
Gilles

Best Mycology Supplier out there hands down. Everything about this guy and his brand is just diamond tier. From his extremely and ridiculously high quality products… to the fact he makes it all and does all the labor himself by his hand ensuring that everything is done in front of a flowhood with sterile techniques being applied and also using only lab grade equipment to create his mycology supply products.

Low Nutrient Agar for Fungi Culturing – Sterile, High-Quality Media
Drippy Corn Mushroom Grain Spawn
Jobn

Quick delivery and so far product working well. Promoting fast growth.

Drippy Corn Mushroom Grain Spawn