This product is a pre-mix of 70% Perlite and 30% Vermiculite. It comes ready to use in a 25L rectangular bag. A 70 - 30 ratio is a great mix for fast growth, but with good moisture retention for summer.
Perlite is a heat expanded, man made product commonly used as a hydroponic growing medium. Vermiculite is a highly absorbent mineral, and combining both mediums make a great hydroponic gardening media.
Perlite retains enough moisture for it to be suitable as a hand watered medium, but also has sufficient drainage to be used in a recycling drip irrigation system. It is extremely lightweight and is suitable for use in a variety of growing containers such as pots, trays, nft channels and Autopot bottom-fed auto watering systems.
Used with Vermiculite, 70 - 30 there is a strong wicking action which makes it a good choice for wick-type hydroponic systems.
We recommend a 70-30 ratio for Autopot systems, outdoor recycling hydroponic systems, and NFT channels.