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Lightweight, moisture-retentive, and perfect for plant propagation, soil improvement, and hydroponic applications. Our premium horticultural Vermiculite is a natural, expanded mineral that improves soil structure, aeration, and water-holding capacity, making it an essential addition for both professional growers and home gardeners.
Whether youre starting delicate seeds, growing cuttings, or blending your own custom potting mixes, vermiculite helps create the ideal growing environment for strong, healthy root development.
Vermiculite is a naturally occurring mineral that expands into light, golden-brown granules when heated at high temperatures a process called exfoliation. These expanded granules are highly porous and can hold several times their weight in water while still providing excellent aeration.
Because its sterile, lightweight, and pH-neutral, horticultural vermiculite is widely used for:
Seed germination
Rooting cuttings
Improving potting mixes
Hydroponic and soilless growing systems
Storing bulbs and tubers
Holds water and nutrients in the root zone for longer, reducing the need for frequent watering.
Prevents soil compaction and keeps oxygen available to plant roots, encouraging stronger growth.
Vermiculite has cation exchange properties, which means it can hold onto nutrients like potassium, calcium, and magnesium and release them to plants over time.
Free from pests, diseases, and weed seeds, making it safe for seedlings and sensitive plants.
Ideal for rooftop gardens, hanging baskets, and potted plants where weight matters.
Can be used on its own or mixed with other growing media such as [Coco Peat], [Expanded Clay Pebbles (LECA)], or compost.
Seed Starting: Use pure vermiculite or mix 50/50 with coco peat for fast, even germination.
Cuttings & Propagation: Keeps cuttings moist while allowing roots to breathe.
Potting Mixes: Blend into soil to improve structure and prevent waterlogging.
Hydroponics: Works as a standalone medium or in combination with LECA or perlite.
Bulb & Tuber Storage: Surround bulbs in dry vermiculite to protect them from rot during storage.
Lawn Care: Mix into topsoil for overseeding to improve moisture retention and seed-to-soil contact.
Fill seed trays or pots with vermiculite (or a vermiculite mix).
Sow seeds according to packet instructions.
Water lightly vermiculite will hold moisture without becoming soggy.
Keep in a warm, bright area until germination.
Mix 2030% vermiculite into your soil or coco peat to improve water-holding capacity and aeration.
Rinse vermiculite before use to remove dust.
Use in net pots, grow bags, or as part of a blend with LECA for better drainage control.
Product Type: Expanded horticultural vermiculite
Bag Volume: 15 litres
pH: Neutral (6.57.2)
Sterility: Naturally sterile and disease-free
Colour: Golden-brown granules
Texture: Lightweight, spongy particles
Always use horticultural-grade vermiculite, not construction-grade.
Rinse before use to remove fine dust.
Store in a dry place when not in use.
For long-term plantings, combine vermiculite with other substrates to balance aeration and drainage.
Avoid overwatering vermiculite holds moisture extremely well.
Premium Quality: Clean, consistent particle size.
Convenient Size: 15L bag easy to store and handle.
Versatile: Suitable for propagation, potting mixes, hydroponics, and storage.
Trusted Supplier: SA Horticultural Supplies has been providing growers with quality substrates and nutrients for years.
[Coco Peat 15L Bag] Increases organic matter and improves water retention.
[Expanded Clay Pebbles (LECA) 15L Bag] Perfect drainage and aeration in hydroponics.
[Perlite 15L Bag] Boosts drainage and airflow in potting mixes.
[Hydroflow Nutrient Solution] Balanced plant nutrition for hydroponic systems.
[pH Down Solution] Keeps your nutrient solution in the optimal range.
[EC/TDS Meter] Monitor nutrient strength for precision growing.
[Seedling Trays] Perfect for germination with vermiculite-based mixes.
Upgrade your growing media with Vermiculite and experience the benefits of improved moisture control, aeration, and nutrient retention. Perfect for gardeners, hydroponic growers, and anyone who wants stronger, healthier plants.
Available now in easy-to-handle 15L bags delivered anywhere in South Africa.
