Thanks, Daintiness. I can't bring myself to just discard it so I will now put it on my borders. Sorry if you get this twice - I wasn't signed in the first time I tried!!
I have repotted a rhododendron and have two bags of used ericaceous compost. I often put used compost on the garden. Can I do this with ericaceous compost or will it harm the plants already thriving in non lime free soil/compost?