This premium black scoria is graded to approximately 4–7mm, making it ideal for creating your own bonsai and specialty plant soil mixes. Scoria has become a trusted substrate component for growers who prefer mixing their own soils. With many experienced artists and growers now sharing their preferred blends, scoria is increasingly recognised as a dependable, locally sourced alternative to imported materials. Quincan scoria helps your soil mix achieve an excellent balance of drainage, aeration, and structural stability. Its hard, porous nature allows water to move freely through the mix while still providing air to the root zone, supporting healthy root development over time. Using the correct substrate components is essential, and black scoria plays a key role in creating the free draining soil structure required for strong growth, fine root production, and long term tree health. Supplied by volume, the scoria is supplied in 6L bags. Scoria can be used with akadama, pumice or potting mix supplied by the experts at Bonsai Shop for all trees, which means you are using the best: Perfect drainage – optimal water amount is retained while excess is drained Natural compounds – acts just like real soil should & provides natural nutrients Designed to be used with appropriate supplements (e.g. fertilisers) Pro Tip: For best results, use a sieve to take our finer particles & dust. Small particles can be used on the soil surface to help with moisture retention.
