is this TEKnically good for growing mushrooms?

It's good for growing shrooms as an ingredient for the PF TEK. Many folks at the Shroomery use it. Even Amazon shows you that people who buy this also buy Brown Rice Flour. Not a coincidence.

Is this fine or coarse grade? I need fine grade, specifically.

I consider it fine. The pieces are not uniform. I don't know if we measure fine grades the same way though so I can't in good conscious recommend the product to you specifically

Does it contain fertilizer?

No although it seems to be a mineral. It expands when wet and hold moisture, thus helping seeds to germinate and grow and apparently also helping cuttings to take root. I have not done cuttings in it yet, but plan to. I just transplanted a small plant today that I started from seed in a 2" pot and that plant has a long root. (Didn't have time to measure it, but maybe five inches.) You need to mix vermiculite with potting soil, of course. I mix perlite, vermiculite and potting soil. Fertilize according to what you are planting in it.

Why so expensive? I can buy the same exact stuff down the road from me for $3.99 for 8 quarts.

At what store? I like to buy Vermiculite in large quantities, I could really stock up if it's only $4 for 8 quarts!

Plantation 8qt Professional Grade Vermiculite Products

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Sold byAmazon Papua New GuineaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌿 Elevate your green space with professional-grade vermiculite!

HYDRATION HERO - Retains moisture to keep plants thriving longer
TRUSTED PROVEN - 4.6-star rating from over 4,400 happy gardeners
CUSTOM SOIL CREATOR - Easily blend with peat moss and perlite for your ideal soilless mix
SEED STARTERS SECRET - Perfect for starting seeds, propagating cuttings, and storing bulbs
BOOST YOUR GARDENS GROWTH - Loosens soil and improves aeration for healthier roots

Plantation 8QT Professional Grade Vermiculite is a top-rated soil conditioner designed to loosen soil, enhance aeration, and retain moisture. Ideal for seed starting, cuttings, and bulb storage, it blends seamlessly with peat moss and perlite to create custom soilless mixes. Trusted by thousands, this 8-quart bag delivers professional results for passionate gardeners.

Specifications

ASIN	B001693Y3Y
Batteries Included?	No
Brand	Plantation Products
Color	No Color
Customer Reviews	4.6 4.6 out of 5 stars (4,455)
Date First Available	9 August 2012
Department	Unisex-Adult
Height	15 inches
Included Components	8QT Professional Grade Plantation Products Vermiculite
Is Discontinued By Manufacturer	No
Item model number	16002
Length	2 inches
Manufacturer	Hoffman A H Inc./Good Earth
Material Type	Plastic
Number of Items	1
Product Dimensions	5.08 x 30.48 x 38.1 cm; 885.3 g
Size	No Size
Style	Custom
Usage	Soil Conditioner
Weight	3 Pounds
Width	12 inches

Reviews

K**N

Fast Shipment & Excellent Product,Highly recommended.

29.07.2016

L**A

It is a great product, a little finer granules than I expected, but should work fine for wintering my bulbs.

10.11.2025

O**.

Just what I needed for my indoor planting.

2.03.2023

A**W

I use this vermiculite when I'm making Mel's Mix. It works so well.

7.09.2025

C**V

Great stuff, it did what I wanted it to do and when I run out I probably will order it again

14.05.2014

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