A Post Office Money survey found that landscaped gardens
add 27% to a home's value, other studies take a broader view. For example, the National Association of Realtors (NAR) and the National Association of Landscape Design Professionals (NALP) have estimated that annual application of mulch, lawn mowing, shrub trimming, and planting about 60 annuals or perennials cost about $2,000 per year, but has 100% return on investment (ROI) after the sale of real estate or work with rentals.
The source of information: https://www.postoffice.co.uk/banking-and-bills