Nothing special, I just cram the rhizomes into cracks and/or drill holes for the plnts where I want them.
Then just some time and the plants grow onto the wood nicely.
One of my main request style wise is not an ADA style tank.
Very few clients want that actually.
I don't either.
I'm a fish hobbyists first.
A small school of a few fish is not my idea of a nice tank. I like more diversity and community effect.
The clients often want a "wall of plants".
If you design a tank with a lot of plants, the only way to open space is to pull the plants back from the front edge and also run them up the back of the tank.
This also provides lots of cover and hides most equipment.
The old 90 gal that's my avatar used cork siliconed to the rear wall and then planted with all sorts of low light epipihytes. You could not see any or flows, tubes etc and it was an open top tank with any drilled holes.
You use this wall of plants as your base. Then you go to work grouping the midforeground and front of the tank's plant groups/designs.
You sort of get chaos + order. I'm very much into that.
Blending the two together will give you a nice scape and also a nice place for high fish loads.
I've gone entirely the other direction also.
Then done decent stuff in between:
this is a 55 gallon here:

and

the other side
In other words, you do not have to add plants to the entire surface of the wood, leave some spots open, or most of it if you like.
Regards,
Tom Barr