Vermiculite A-2 Medium (1 Quart)
Vermiculite A-2 Medium (1 Quart) is backordered and will ship as soon as it is back in stock.
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Description
Description
This 1 quart of Sun-Gro horticultural vermiculite is a medium (A-2) grade that holds water well, which makes it the go-to for dunk and roll on PF tek cakes and for topping off casing layers in bulk grows.
It's the same vermiculite we use in all of our kits and grows, so you know exactly how it will behave. One quart is enough to dunk and roll up to 24 PF jars, and it arrives in sealed, ready-to-use packaging. Unlike the coarse vermiculite sold at many garden centers, this grade coats cakes evenly and keeps moisture where your mushrooms need it.
- 1 qtSealed bag
- A-2Medium grade
- Sun-GroHorticultural
- Up to 24PF jars rolled
- SameAs in our kits
Why growers use our vermiculite
- Holds moisture – Absorbs water and releases it slowly, helping keep cakes and casings hydrated through fruiting.
- Even coating – The medium grade sticks to a damp cake in a uniform layer during dunk and roll.
- Proven in our kits – It's the same vermiculite that goes into every Midwest Grow Kits kit and grow.
- The right size – A quart covers a full round of PF jars without leaving you with a bulk bag to store.
- Ready to use – Ships in sealed packaging, clean and ready when your cakes are.
What's included
- 1 quart of Sun-Gro horticultural vermiculite, medium (A-2) grade, in sealed packaging
How to dunk and roll PF cakes
- Birth the cake. Once the jar is fully colonized, slide the cake out of the jar.
- Dunk. Rinse the cake and soak it in clean water to rehydrate it.
- Roll. Roll the damp cake in dry vermiculite until it has an even coating on all sides.
- Set it to fruit. Place the coated cake in your fruiting chamber and keep humidity up.
Storage tip: Keep any leftover vermiculite sealed and dry so it stays clean for your next round of jars.
Specifications
| Specification | Detail |
|---|---|
| Brand | Sun-Gro Horticulture |
| Grade | Medium (A-2) |
| Volume | 1 quart |
| Dunk & roll coverage | Up to 24 PF jars |
| Uses | Dunk and roll, casing top-off, moisture retention, jars, spawn bags and bulk projects |
| Packaging | Sealed, ready to use |
Growing in bulk?Step up to the 4 cubic foot bag of A-2 medium vermiculite. For PF tek, pair it with our BRF PF tek jars or pint substrate jars.
FAQ
How many PF jars will one quart cover?
One quart is enough to dunk and roll up to 24 PF jars.
What grade is this vermiculite?
It is a medium (A-2) grade horticultural vermiculite from Sun-Gro.
Is this the same vermiculite used in your kits?
Yes. It is the same vermiculite we use in all of our kits and grows.
What else can I use it for?
Besides dunk and roll, it works for topping off casing layers in bulk grows, adding moisture retention during fruiting, and in jars, spawn bags and bulk projects.
Do you sell larger amounts?
Yes. We also carry a 4 cubic foot bag of A-2 medium vermiculite for bulk growers.

