Answer
Why do a landscaper's accreditations matter?
They are independent evidence of a recognised standard, not just the firm's own word. Fair to ask for.
In short
Because they are independent evidence, not just a claim. Memberships like the APL, manufacturer approvals like Marshalls, and certifications like Aquascape mean the work is held to a recognised standard by someone other than the firm doing it. They are a fair thing to ask any landscaper for.
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