Soil Mixes That Truly Understand Your Plants Not all soil mixes are...
Mineral substrates are becoming a favorite among plant lovers who want healthier roots, better drainage, and a more natural environment for their houseplants. Unlike traditional peat-based soils, mineral substrates last longer, reduce pests, and give you more control over watering and fertilising. In this FAQ, we’ll walk through everything you need to know about mineral substrates, from what they are to how to use them successfully.
Mineral substrates are growing mediums made entirely from natural minerals like pumice, perlite, zeolite, or clay balls. Unlike organic soils, which break down over time, mineral substrates remain stable and airy, providing consistent conditions for roots.
They are chosen because they reduce the risk of root rot, last longer, and provide excellent aeration. Many people also enjoy the extra control they give, fertiliser and water are easier to manage compared to traditional soil mixes.
Succulents, cacti, and bonsai thrive in mineral substrates because they prefer fast drainage and airy root environments (so without selfwatering pots!). However, tropical houseplants like Monstera or Philodendron can also do very well in blends with mineral substrates added for extra structure or on their own with a self watering pot.
Yes, although they do require some learning. Because mineral substrates hold less water than organic soils, beginners need to adjust their watering routine. With a little practice, they are an easy, forgiving medium.
Absolutely. Many growers mix mineral substrates with organic soil to create a balance between moisture retention and drainage. This makes it easier to customise the mix for each plant’s needs. Our SYBASoil and SYBAStones mineral mixes are ready to use, no mixing needed!
Common mineral substrates include pumice, perlite, clay balls, zeolite, and lavastones. Each has different properties, but all provide improved aeration and drainage compared to soil alone.
Pumice is a volcanic rock that is lightweight, porous, and excellent for improving aeration. It absorbs small amounts of water, releasing it slowly to roots while preventing compaction.
Perlite is a heat-expanded volcanic glass, often lighter and whiter than pumice. While both improve aeration, perlite holds less water and floats to the surface more easily. Pumice tends to be heavier and stays mixed more evenly.
For a similar additive often used in soil mixes, see our perlite FAQ.
Clay balls consist of small clay balls that are highly porous. They are often used in semi-hydro setups, absorbing water from a reservoir and giving plants a consistent but airy environment.
Zeolite is a mineral that absorbs and slowly releases nutrients, often used in bonsai mixes. It is long-lasting and excellent for precise plant care.
Yes, all SYBAStones mineral mixes at Sybotanica are 100% peat-free and eco-friendly. Choosing mineral substrates is not only good for your plants but also better for the environment.
Their porous, granular structure keeps air flowing freely around the roots and ensures excess water drains away quickly. This reduces the chance of suffocating roots or waterlogged soil.
Yes, they greatly reduce the risk. Because water drains freely, roots are less likely to sit in soggy conditions where rot-causing fungi thrive.
Minerals themselves don’t provide much nutrition, so plants rely on added fertiliser. However, minerals like zeolite can help retain nutrients and release them slowly to the roots.
Yes, unlike organic soils that break down and compact, mineral substrates remain stable for years. This means less frequent repotting and healthier roots long-term.
Yes, pests like fungus gnats thrive in moist organic matter. Since mineral substrates dry out faster on the surface, they are far less attractive to pests.
When repotting, gently rinse off as much old soil as possible from the roots, then pot into the mineral substrate. Transition slowly and monitor watering, as plants will need adjusting time.
For more guidance on containers, see our blog on how to choose the perfect pot for your plant.
Plants in mineral substrates need more frequent but lighter watering because minerals don’t hold as much moisture. Always check the roots or substrate before watering again.
Yes, since mineral substrates don’t naturally contain nutrients, you’ll need to provide fertiliser more regularly. Using a balanced mineral liquid or granular feed during the growing season works well.
Yes, mineral substrates can be washed, sterilised, and reused. This makes them both economical and environmentally friendly.
They work best in selfwatering pots with drainage holes and a water reservoir so excess water can escape easily. Clear or net pots are popular with clay balls users to monitor water levels.
Yes, they are ideal. Succulents and cacti prefer dry, airy conditions, and mineral substrates prevent the waterlogging that often kills them.
Yes, many orchids appreciate specialized mineral mixes with materials like pumice or ember clay. These provide stability while keeping roots dry between waterings.
Yes, materials like clay balls are staples in semi-hydroponics. They absorb water from a reservoir while keeping roots airy.
Yes, moving a struggling plant into a clean, airy mineral substrate can give roots a fresh start and reduce the chance of rot recurring.
Yes, cuttings root very well in materials like perlite, pumice or clay balls. The airy environment reduces the chance of rot while encouraging healthy root development. Try to avoid mixes that already contain fertiliser to prevent root burn.
It may need a more specialized fertiliser, as minerals don’t provide nutrition on their own. Double-check your watering and feeding schedule.
Mineral substrates generally resist compaction, but fine dust can build up. Rinse or replace dusty parts to restore airflow.
This is normal for some minerals like pumice or akadama. Dust can be rinsed off before use, and dryness doesn’t mean it lacks water deeper down.
Some minerals like akadama slowly alter pH as they break down. Regularly check your plant’s health and adjust fertiliser if needed.
Simply rinse thoroughly, soak in hot water, or sterilise by boiling if needed. Once clean, they are safe to reuse for many years.
Sybotanica offers a wide range including pumice, perlite, clay balls, zeolite, and specialised blends called SYBAStones. Each is carefully sourced for quality and sustainability.
Check out our SYBAStones blog or use our SYBAScan.
Use our pot volume calculator to figure out how much substrate you’ll need for any given pot size.
Sybotanica provides a 100% satisfaction guarantee, if you’re not happy, you can return the product for a refund. The focus is always on helping you and your plants thrive.
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