I don't know if this work. Nah! Of course it will!!

A couple of years ago, when I bought this place, the garden was non-existant.
Total freedom to "do my own thing", , so I did, and am still, very much doing, so.
One of the first things I did was I have a Cornish Hedge built. For the uninitiated, that is the wall in the image.
This part of the garden, I just very roughly opened up and spread Digitalis and Hollyhock seed to give it some colour till I decided what else I wanted from it.
The Digis did sort of OK, the HH less so. C'est la vie.
So to the present.....
I created a raised bed, filled with good quality compost, mixed with a bit of sieved soil (to remove the rocks and 40 yr old builders' rubbish).
Planted Digi and HH seed again, one of the original Digis and planted 4 different Hedychium.
Now to see what happens.

 

What are the 4 different Hedychiums that you have planted.

 

Just checked my records. 4 plants, 3 varieties
Hedychium gardnerianium x 2
H. coronarium
H. densiflorum ‘Assam Orange’
The H. coronarium is a lot smaller than the others as that is a replacement for one that failed, for some reason.