Posted: 04/03/2015 at 09:02
I haven't come across the Magic coloured beads but the ordinary water retaining gel which you mix with compost when potting up does help to keep the compost moist and reduces the amount of watering.
There is always a downside tho............if your pots are outside and you get a lot of rain, the pots can get extremely wet. Also, the gel doesn't break down and disappear after a season so you can end up with claggy compost forever ! Not so clever when the cold weather arrives.