I don't know if this has been discussed previously here and there's an easy answer. However, a few of us designers/landscapers in Scotland are looking for an industry-wide sustainable solution for what to do with small to medium quantities of materials that are left over from a project or are already in a client's garden but don't fit into the new design.
This is especially a problem with paving project packs where there's often a few perfectly good leftovers. But also includes things like spare plants.
What's best to do? Skip (trying to avoid!), return to suppliers, recommend clients sell or give away on something like Freecycle, or are there other solutions like a landscaping spare materials store (online or physical yard)? Ideas welcome!