Posted: 15/10/2016 at 17:39
Wills....wont be the end of the world either way. See what David Austin say.
I am a great believer in compost etc rather than adding more top soil but if you feel more soil is better that's fine.
In my case, the sentimental rose deserved the best I could do at planting time. The "best" means organic matter.
I think we are agreed that mpc is not ideal......fine for temporary potting up etc but not long term.
a foot wide is not much....can you make this part of your border a little wider? Maybe to curve out a bit? A narrow border, paradoxically, requires more maintenance as plants do not grow as well as they would in a larger one.