Advice on blueberries, sandy soil and what to do with a supermarket rose

[flowerpot13]

The soil in the ground is quite sandy and its occurring to me that a number of the plants I already have don't like that. so my blueberry bushes need to be in a container of some sort unless there's a way to keep them in the ground?
Does anyone happen to know about making DIY compost/nutrient solutions. I've heard of things like coffee and vinegar.
I impulsively bought a rose from the supermarket, although it just says pink rose on the label. My options are to try and turn it into a standard (is that possible?) or is it really best to train them tied back onto a trellis - or get rid of it all together for a different rose?

Blueberries thrive in highly acidic well draining soil. It's possible to grow them in sandy ground (which will be well draining) if you enrich it with ericaceous compost. I'd advise purchasing a bag of it as making your own compost with a compost bin will take time and probably not be the right pH and fiddly to adjust. Blueberry bushes also like to be near other blueberries (preferably different varieties) for cross-pollination.