Hi,
thanks for the info, nothing in the packaging about the max height but TBH there isn't a huge difference. Usually I leave the pots in the paddling pool which gets topped up every few days whilst we are away but everything is late this year and quite small so thought this would be a better option.
I soaked the matting today and left it and it does seem to be darker which hopefully means wetter. I'll have to see at the end of tomorrow and ask my friend to move them into the pool if they are dry when they come to check on them so fingers crossed