Fine Expanded Vermiculite – Neutral pH, ideal for closing the hole in rockwool cubes.
It provides a more stable environment for the seed, immediately improving germination conditions. Thanks to its fine grain size, it settles perfectly inside the cube’s hole, protecting the seed and creating the ideal micro-environment for sprouting.
Allows light-sensitive seeds to germinate in a darker and more protected environment.
Softens excessive light: ideal for seeds that prefer indirect light for a balanced start.
Maintains constant moisture inside the cube hole, reducing the risk of early dryness.
Ensures natural oxygenation around the seed.
Fine grain size (1–3 mm) fits perfectly into the hole without compacting.
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1-year free replacement for faulty or defective parts.
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Ideal for starting most plants commonly grown in hydroponic towers, such as:
Leafy greens and lettuces
Aromatic herbs (basil, mint, parsley)
Arugula, pak choi and other brassicas
All types of baby leaves
Suitable for any germination stage that involves rockwool cubes with a central hole. Perfect for seed trays and home hydroponic propagation systems at any time of the year.
Once the seed is placed inside the rockwool cube hole, simply cover it lightly with a small amount of Fine Expanded Vermiculite.
Its structure retains the necessary moisture, protects the seed from direct light, and stabilizes the sprouting environment.
For complete instructions on germination and managing hydroponic seed-starting systems, dedicated guides are available.
Stable, neutral pH: 7.0–8.0
Electrical conductivity: 0 mS/cm, ideal for use with nutrient solutions
High water retention: 400–500 ml/L
Dry matter: 100%
Fine grain size: 1–3 mm, perfect for filling rockwool cube holes
The expanded, porous structure ensures the right balance of moisture and oxygen in the most delicate spot of germination: the cube hole. Its chemical neutrality ensures full compatibility with rockwool and with any nutrient solutions used during the early stages.
Use only a small amount, without compressing it: the vermiculite should rest gently on the seed to create a balanced micro-environment. For very small seeds, a very thin layer is enough to filter the light without hindering sprouting.
Product selected and processed according to high standards to ensure purity, consistent grain size and stable pH—key elements for uniform and reliable germination in hydroponic systems.
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