Like to try this - buy just a block or two!
 
FibreFloral™ Design Media Block from Smithers Oasis
A natural product based on volcanic basalt rock with a bio-based binder that is derived from rapidly renewable materials
Natural colour
Excellent water storage capacity
Fast soaking
Can be soaked in water with FloraLife® Flower Food
Excellent flower life for most flower types
Optimal PH range for most flower types
Re-usable, following use, for growing plants from cuttings and seeds
For use with fresh and dry flowers
Box of 20 bricks
Each brick measures H: 8 x W: 23 x D:11cm
Typical Uses
To help you create floral displays. Either soak and use wet with fresh flowers or use dry with dried or artificial flowers. 
 
Disposal
Dispose of used FibreFloral™ Design Media from Smithers-Oasis in general waste. Not suitable for home composting.
Cardboard box - dispose of in cardboard recycling
 
Handling
This is a non-toxic product; hand, eye, skin and respiratory protection are not required, but may be used if desired.