Posted: 03/08/2017 at 13:59
Concha is a Ceaonthus cultivar.
Hard to find precise answers to some things, especially on a forum where different people will have tried different things. Plants don't read the books so we all try what we think will work, sometimes it does, sometimes it doesn't.
You won't find a guarantee of success. You may find someone who will tell you exactly what to do because it worked for them (or in some cases because they read it on a website) but it's no guarantee it will work for you.
Sometimes you just have to get out the saw and hope for the best