Spongolite is comprised of almost 99% silica. Silica plays a very important role in strengthening cell structure in plants, making them less susceptible to pest and disease attack. It also aids in healthy flower and fruit production.

Spongolite is very lightweight and extremely porous. It has a natural ability to hold onto water. The sponge structure is silica based and very strong, which means it does not tend to break down quickly.

In horticulture, it is used in potting mixes and garden beds to help with water retention. Containing silica, it is abrasive and care should be taken to avoid breathing dust particles (its needle like structure is similar to asbestos).

It is a useful additive to potting mix; incorporate at about 2 – 10% of the total volume used.It can be worked into the top 100 - 200mm of soil, or added to compost piles. On sandy soils, use at a ratio of 250gms – 1kg per square metre. As a general rule, the poorer the soil, the more Spongolite may be required. Try a smaller quantity, and repeat application if required.