Fine vermiculite

Does vermiculite come in fine medium and coarse? Is vermiculite difficult to find? What is the property of vermiculite? Product Title Vermiculite QT - Grade Fine. Average rating: out of stars, based on reviews.

Fine (small) sized vermiculite. The PF tek recipe is: parts fine vermiculite , part brown rice flour, part H2O. Sold in ½ gallon increments. Coarse grade vermiculite is available here.

Vermiculite has the excellent property of improving soil aeration while retaining the moisture and nutrients necessary to feed roots, cuttings, and seeds for faster growth. Vermiculite possesses cation exchange properties, thus it can hold and make available to the growing plant ammonium, potassium, calcium and magnesium. Vermiculite is a 2:clay, meaning it has two tetrahedral sheets for every one octahedral sheet. It is a limited-expansion clay with a medium shrink–swell capacity.

The only problem with vermiculite is that is very difficult to find in the home gardening market place. These chunky granules are further processed into the coarse, medium, and fine grades of vermiculite that we see and know in gardening. Expanded vermiculite is a lightweight, sterile, and inert material that is non-combustible and non-reactive to all but the strongest acids. That’s good news, because most Zonolite, a type of vermiculite insulation, falls into that category.

It contains air pockets and increases aeration and moisture retention in mixes. The smaller grades encourage seed germination because of its aeration and water-holding properties. When heate it expands into worm-like pieces.

Grade vermiculite is suitable for chemical shipping and protects bottled liquid. The absence of fines makes it ideal for use with smaller packaging, while also creating less dust. It is also used as a growing media and cover for seed topping.

As a natural mica mineral, it works as a soil additive to. Also, the medium grade does turn into a fine grade much sooner than if you start with the coarse grade. This is a Grade C-vermiculite. All that being sai I might point out that in third world countries where they can’t afford vermiculite of any grade, we start their gardens with pure homemade compost.

Why don’t we do the same in this country? Because it won’t be as good. The expanded vermiculite is a light-weight, fire-resistant, and odorless material and has been used in numerous products, including insulation for attics and walls. Sizes of vermiculite products range from very fine particles to large (coarse) pieces nearly an inch long. Vermiculite Concrete Introduction Vermiculite concrete is a low density non-structural construction product.

It is insulating (both thermally and acoustically) and intrinsically fire resistant. It is normally made simply by mixing exfoliated vermiculite as the aggregate, with cement and water, plus additives such as plasticisers if required. Free Shipping Available. Money Back Guarantee! Bag 37WVFG is a fine vermiculite with a small particle size meeting ASTM C-5Type Grade C-specifications.

There are various grades of horticultural vermiculite from fine to coarse. The finer grades are better for seed starting, while the coarser grades are recommended for soil amendment. If you have any general questions about Sun Gro Horticulture please contact us using one of the means below.

Mix cubic feet (cm.) of vermiculite per 1square feet (m².), see then cover the entire area with ¼ inch (cm.) of vermiculite. Water in with a fine spray. The vermiculite will hasten germination and increase the number of seeds that germinate while maintaining moisture and protecting from drying and heat.