Ceramic pellets - Natural substrate for microgreens - GEO Bavicchi

The natural and reusable substrate for your microgreens

🌱 GEO ceramic pellets are the substrate designed to grow your microgreens simply, cleanly, and without disposable waste.

Concretely, these are small porous granules offired clay (3 to 7 mm in diameter), which act as the soil in the cultivation of seedlings - but better. No soil that dirties the kitchen. No coconut mats to repurchase for each cultivation. No disposable felts or imported peat. Just a 100% natural mineral material that retains water just enough and can be rinsed between sowings for reuse. There you go.

Distributed by Geo Bavicchi, our Italian supplier of organic seeds for almost 130 years, these pellets are made in Germany and designed to work with the sprouter GEO Smart Greens. But their structure also allows them to be used in any other cultivation tray compatible with capillary irrigation.

🌱 The advantages of GEO ceramic pellets:

✓ 100% natural : pure fired clay, without additives, without fertilizers, without chemical treatment. Inert substrate.
✓ Reusable up to 5 times : a simple rinse with clear water between two crops is enough to start a new sowing.
✓ Porous structure : the ceramic retains water in its micropores and gradually releases it to the roots, without excess.
✓ Low water consumption : thanks to this structure, you water much less than with a traditional substrate.
✓ Healthy cultivation environment : the mineral nature of the substrate naturally limits the development of mold, unlike organic supports that are permanently damp.
✓ Clean and easy to handle : no dust, no dirt on the work surface, no residues to clean.
✓ Designed for the sprouter GEO Smart Greens : perfectly compatible with white perforated trays, calibrated format for 1 sachet = 1 culture.

🌱 How does it work ?

The principle is simple and elegant. The pellets are composed of a porous ceramic which acts like a mineral sponge: they absorb water from the lower tray of the sprouter through capillarity, store it in their micropores, and gently release it to the roots of the young shoots as needed.

In concrete terms, it's the same principle as expanded clay pellets that gardeners use in hydroponic cultivation - except that GEO ceramic granules are calibrated for microgreens cultivation: sized from 3 to 7 mm to avoid crushing young seeds, with a porous structure to promote constant humidity, and a sufficient surface area to allow roots to anchor.

This mode of operation offers several decisive advantages: it prevents overwatering (the number one cause of mold on microgreens), maintains an aerated environment at the root level, and provides no nutrients—which is exactly what we want since the microgreen seed contains all the necessary reserves for its growth until harvest.

🌱 How to use GEO ceramic pellets ?

The use is ultra-simple and takes less than 2 minutes:

1. Pour the packet in the perforated white tray of the sprouter GEO Smart Greens, with a thickness of 1 to 1.5 cm.

2. Distribute by hand Uniformly, without packing. The granules should remain aerated.

3. Sow your seeds on the surface (for example dill seeds, , Beetroot, , green mizuna, , red Swiss chard...), without pushing them in.

4. Spray generously With clear water on the first day to properly hydrate everything.

5. Place the bin on the lower green bin. filled with water. Capillarity does the rest.

And there you go. Your sprouts will develop in 10 to 21 days depending on the variety.

🌱 How to reuse pellets in 4 steps ?

This is the strong ecological argument of this substrate: one purchased sachet is a sachet that will serve you for up to 5 successive crops. Here is how to proceed between two sowings:

1. Remove the roots and seeds. After harvesting your microgreens (cut with scissors at the base), manually remove the tangle of roots and any ungerminated seeds. Most of them come off in a block, like a small mat.

2. Rinse the pellets with clear water. Pour them into a fine strainer and rinse under the tap for 30 seconds, removing all plant residues. No detergent is necessary. No soap either - it's best to avoid any chemical residue coming into contact with your next crops.

3. Drain and air dry. Spread the pellets on a clean cloth in a well-ventilated area until completely dry.

4. Reinstall them in the tray and start your new seedling. That's all.

Bavicchi recommends a maximum of 5 reuses to maintain optimal cultivation quality. Beyond that, the porous structure of the ceramic begins to accumulate fine organic residues, and it is time to switch to a new sachet.

Frankly, it is a real alternative to disposable substrates like coconut mats, felt, or potting soil, which need to be repurchased and discarded with each cultivation. In the long run, it is a real saving and an ecological gesture consistent with the spirit of living food.

🌱 Why did we choose these pellets ?

When the sprouter has been selected GEO Smart Greens for our Biovie catalog, we also chose to offer its companion substrate. For several reasons:

- System coherence. Pellets and sprouter are designed to work together under the GEO brand by Bavicchi. The size of the pellets (3 to 7 mm), the porosity, the recommended thickness: everything is calibrated to work as a duo. No tinkering, no unpleasant surprises.
- Zero waste approach. The vast majority of microgreens substrates on the market are single-use (coco mats, felt, paper, potting soil). GEO ceramic pellets can be reused up to 5 times, and then find a second life in the garden or in pots. It's rare, and it's valuable.
- Pure mineral material. 100% baked clay, without fertilizers, without added fertilizers, without treatment. For a substrate used to produce food that we eat raw, this is exactly what we are looking for.
- European pathway traced. Pellets made in Germany, selected and distributed by Bavicchi (Italy), our supplier since the very beginning of Biovie in 2007. A short and transparent supply chain, on which we have a lot of visibility.

🌱 Frequently Asked Questions about GEO Ceramic Pellets:

🌱 To learn more about growing microgreens, check out our blog articles:

What is the benefit of sprouting seeds ?

What are the benefits of sprouted seeds ?

What seeds can be sprouted? The complete list by category