Posted: 09/10/2015 at 17:07
It's understandable Lucid. We can all overthink things, and plants are expensive so we don't want them to die!
The usual rule of planting is 'right plant, right place', which simply means pick something suitable for your site and conditions, but that can be hard to interpret until you have some experience of growing various different plants. Location in the country is also a big factor. My conditions are very different from Verdun's - he's in Cornwall and I'm in west central Scotland!
As Verd says - if something isn't thriving, you can move it, and if there's a plant you really want to put in, and you aren't sure if you have the right site, you can ask on the forum as to whether or not it will suit you. There will always be someone with experience who can advise