Answer
Do you design the planting as well as the build?
Yes, the planting plan is part of the design and built by the same team.
In short
Yes. Planting is part of the design, not an afterthought. A scheme includes a planting plan suited to the soil, the aspect and how you want the garden to feel, planted to establish and to look right as it matures, by the same team that builds the rest.
Arrange a consultation
Send a few photographs and a sentence about the site. We will reply personally.