How do water retaining gel crystals work ?
Buckinghamshire, United Kingdom
While reading the Letters Page in last week's Amateur Gardening magazine I came across a question about water retaining gel crystals. It has left me wondering.
Like the author I think I can remember some years ago seeing Magnus Pyke showing television viewers that no matter how hard he tried he couldn't get any water back out of the gel. It would appear the gel works while the compost is moist, but as the compost dries out can plants' roots access the water contained in the gel ?
If we have to keep the compost moist anyway for the gel to work why are we using it?
I thought as the compost dried out it absorbed the water from the gel .... does anyone know, how does it actually work ?
- 2 May, 2008