Perlite is created by crushing and heating volcanic rock until it expands to create small, white, porous pieces. This lightweight material is pH neutral and is usually added to soil mixes to increase aeration, prevent compaction and promote root growth; but we also use it as a standalone substrate for rooting cuttings or for rehabilitation.
Coarse grade is approximately 3-5mm grade
Grow Tropical's Coco Fibre is the perfect blend of the coconut’s pith and fibre and it is an excellent alternative to peat moss where the benefits of peat moss don’t outweigh the environmental concerns. Compared to our competitor's coco coir, this mix is airier and holds its structure much better.
In addition, our Coco Fibre has a mean pH level of 6 in contrast to peat’s pH of 3.7, lending it to a far greater array of applications. Its resistance to mould, and high moisture and nutrient retention, makes it an excellent base for most substrate mixes.
Similar to the Coco Fibre, Coco Chips readily absorb water and nutrients, but having not been milled, are suitable as an organic aeration medium for coarser blends and aroid mixes. The roots of Anthuriums go wild for this stuff! A pH neutral, natural equivalent to expanded clay.
Biochar is a carbon rich soil amendment that doesn't readily decompose.
Amazonian peoples use charcoal as a key ingredient in their terra preta soils and today it is a staple component in nearly every substate mix used in the aroid, terrarium and vivarium hobbies.
Used as 1 in a 10 part substrate mix, charcoal can help to stem mould and its open capillary structure acts as a conduit for water, air and nutrients.
- Water retention
- Nutrient supply to roots
- Decrease runoff of nutrients
- Support microbes and mycorrhizal fungi
Graded to 0-8mm (mostly 1-3mm fines).
LECA (lightweight expanded clay aggregate) has wicking properties that make it an excellent medium for growing plants hydroponically or for use as a component in a soil mix.
With two available sizes, our LECA will meet the needs of small, medium and large plants alike. LECA is also commonly used as a drainage layer for terrariums and our LECA, being darker and less uniform than some other brands, makes for a more pleasing aesthetic when used for this purpose
LECA is nearly half the density of calcined clay and about the same density as horticultural charcoal, making it an ideal substrate option for drainage layers. We recommend covering LECA with a material such as horticultural fabric or synthetic screening to prevent smaller-grained substrate materials from filtering down.
Live sphagnum moss
Collected on licence in Northumberland, this moss is the best quality live moss we've ever used and significantly higher quality than other suppliers we've used in other areas of the country.
Live sphagnum moss is ideal for holding moisture in mixes, for rooting cuttings and for growing potted carnivorous plants. We sell this in loose volumes, so you can choose exactly how much you need.
Orchid bark is an excellent organic aeration medium to add into substrate blends. From fine to large it can be used in bioactive grow bins and chunky aroid mixes respectively, with endless possibilities in-between. We even grow some orchids exclusively in bark. Just be careful not to overwater as water retention is long-lasting and a dry surface in pots can be deceiving.
Coarse grade: 12-18mm
Worm Castings - manure generated by earthworms - are the perfect addition to your substrate blends to add an organic fertiliser. Worm castings provide all the essential nutrients your plants need and will also aid moisture retention and aeration.
Mix into your substrate before potting up, use as a top dressing to be watered into the root ball, or make a microbe tea by mixing with water.