I know this isn't something new but it is new to me.A couple of weeks back I nipped the tops out of my Leonotis seedlings ,it was too wet to paddle outside for compost so with always having Oasis foam lying around for flower arranging I thought that'll do...It seemed a shame to just bin the tops so I stuck them in the Oasis...these things fascinate me,I'll be using it more often
http://www.amazon.co.uk/Oasis-Floral-Maxlife-contains-bricks/dp/B003FV98EU Florists use it for cut flowers - really odd feeling stuff when dry