Greens are the most carefully built and maintained part of any golf course. Beneath the smooth surface is an engineered structure designed to drain well, support healthy grass and keep the putting surface firm and true. Here's how greens are built.
Construction layers
| Layer | Purpose |
|---|---|
| Drainage pipes | Remove excess water |
| Gravel layer | Drainage and support |
| Sand-based rootzone | Holds roots, drains well, resists compaction |
| Turf | The putting surface |
Many modern greens follow recognised specifications for sand-based construction.
Push-up greens
Older courses often have "push-up" greens made from native soil. They can be excellent but may drain more slowly and need careful management, such as aeration and topdressing. Read golf course maintenance explained.
Shaping and contours
Architects design contours for strategy, drainage and enough flat areas for hole positions. Read golf course architecture history and pin positions and flags.
Choosing the grass
The grass depends on climate and goals. Read golf grass types.
Grow-in
After seeding or turfing, greens need weeks or months of careful watering, feeding and mowing before they can be played. Courses may use temporary greens during rebuilds.
Rebuilding greens
Clubs rebuild greens to fix drainage, restore lost contours, change grass type or improve playability.
Why construction matters so much
A green is the most heavily used and carefully managed area on a course. Every golfer walks on it, and it must stay smooth, firm and healthy through heavy traffic, close mowing and changing weather. Good construction makes this possible by:
- Draining water quickly, so greens stay playable after rain.
- Resisting compaction from feet and machinery.
- Holding enough moisture and nutrients for the grass.
- Allowing roots to grow deep for a healthier plant.
A typical construction sequence
| Stage | What happens |
|---|---|
| Design and survey | The architect shapes the green and its surrounds; levels are set |
| Subgrade shaping | Soil underneath is shaped to mirror the final contours |
| Drainage | Trenches and pipes are laid in a herringbone or similar pattern |
| Gravel layer | A layer of gravel over the drains |
| Rootzone | A specified sand-based mix is spread and firmed to an even depth |
| Final shaping | Contours are refined and checked |
| Seeding or turfing | Grass is sown or laid |
| Grow-in | Weeks or months of careful watering, feeding and mowing before play |
Why greens differ from course to course
- Age: older greens may be built on native soil (push-up greens) and drain more slowly.
- Rootzone mix: different sands and organic content change firmness.
- Grass type: bentgrass, poa, fescue or warm-season grasses all behave differently. Read golf grass types.
- Contours and size: design choices affect speed and pin options. Read pin positions and flags.
- Maintenance: mowing height, rolling, topdressing and irrigation.
Looking after greens
After construction, greens need ongoing care: aeration to relieve compaction, topdressing with sand to keep the surface firm and smooth, regular mowing and rolling, and careful watering. Golfers help by repairing pitch marks and not dragging feet. Read golf course maintenance explained and putting green rules.
Temporary greens
When a green is being rebuilt, or in frost or very wet weather, courses may use temporary greens cut on the fairway. They're slower and bumpier, but protect the main greens and keep the course open.
Frequently asked questions
What is under a golf green?
Often a sand-based rootzone over gravel and drainage pipes.
What is a push-up green?
A green made from native soil, common on older courses.
How long does a new green take before play?
Usually several months, depending on grass and season.
Why do clubs rebuild greens?
To improve drainage, contours or grass.
Why do courses aerate greens?
To relieve compaction, improve drainage and encourage deeper roots. The holes recover within a couple of weeks in the growing season.
What is topdressing?
A thin layer of sand spread over the green to smooth the surface and improve firmness and drainage.
The bottom line
Greens are engineered surfaces built for drainage, healthy grass and true putting. For more, read how to become a golf course architect.