Design, Installation, and Maintenance Project Excellence
Domain 4: Design, Installation, and Maintenance Project Excellence
This domain tests the project decisions that make a landscape work after the trucks leave: site assessment, plant selection, drainage, installation sequence, irrigation, quality control, and the maintenance handoff. The exam rewards thinking in systems-soil, water, plants, and people-rather than isolated tasks.
Core rules and concepts
- Assess before you specify. Check soil texture and compaction, drainage patterns, sun and wind exposure, utility locations, access, and existing vegetation. A plant list that ignores these is a future callback.
- Right plant, right place. Match mature size, water needs, hardiness, and maintenance intensity to the site and the client’s realistic care level.
- Grade for drainage. Water should move away from structures and toward designed collection or infiltration areas. Do not create low spots against foundations or hardscape.
- Sequence installation. Typical order is layout and staking, drainage and utilities, hardscape, soil preparation, irrigation, planting, mulch, then cleanup and walkthrough.
- Hand off maintenance. Provide a care schedule, irrigation settings, and a punch-list walkthrough. Maintenance is part of project quality, not an afterthought.
Worked example
A client wants a low-maintenance bed on a slope with heavy clay. The designer first checks drainage and finds water pooling at the foundation. The plan regrades the bed to a shallow swale, amends the clay with organic matter, selects plants with similar water needs, and installs irrigation with matched precipitation heads. The crew plants at the same depth as the nursery root flare, mulches to the correct depth without mounding against stems, and runs a catch-can audit before the walkthrough. The maintenance schedule lists pruning timing and irrigation checks. Each decision addresses a site condition, not a catalog preference.
Traps
- Planting too deep or burying the root flare.
- Ignoring soil compaction and drainage on new construction sites.
- Setting irrigation schedules without a distribution audit.
- Skipping as-builts and the maintenance handoff.
- Letting a punch list become a verbal promise.