The short answer
Measured, not promised: in independent lab testing with a USGA Stimpmeter, two putting turfs from the line we install rolled at about 8.5 feet and about 8 feet, with 2.5 pounds per square foot of fine 60-grit sand brushed in. Real-world speed on your green depends on the infill, how it's brushed and rolled, the slope you build in, and the weather, so we publish the lab numbers instead of promising a speed.
The short version
| What was tested | Result | Test conditions |
|---|---|---|
| Putting turf 1 | about 8.5 ft (8.5 ft one way, 8.58 ft on the return) | USGA Stimpmeter, 2.5 lb/sq ft of 60-grit sand |
| Putting turf 2 | about 8.0 ft (7.92 ft one way, 8.08 ft on the return) | USGA Stimpmeter |
| Putting-green infill | 30/50 mesh rounded silica is the standard sold grade; #60 mesh is the fine end | Finer sand brushes into the tight putting fiber |
What does a stimp number mean?
A Stimpmeter is a simple ramp that releases a golf ball at the same speed every time. The number is how many feet the ball rolls on a flat stretch of green, averaged in both directions. A higher number means a faster green. The two-direction average matters because a green can roll a little differently with and against its grain.
What decides how fast a backyard green rolls?
- The putting surface. Putting turf has a short, tight pile, around half an inch, on close-set stitch rows, so the ball rides on top.
- The infill. Fine silica brushed in supports the fibers and changes the roll. How much goes in, and how evenly, moves the speed.
- The build underneath. A firm, smooth, well-compacted base is what keeps a putt rolling true instead of drifting.
- Slope and breaks. The contours you design in change how the ball behaves as much as the surface does.
- Weather and care. Heat, moisture and how recently it was brushed all play a part.
Florida note
Florida sun and afternoon rain are part of any outdoor green here. Greens near the house deserve a check for window reflection at the estimate, because reflected sun from energy-efficient glass can melt turf fibers, and the fiber choice for a green near glass is worth discussing.
The honest downside No backyard green is a tournament green, and anyone promising you a specific stimp reading on day one is guessing. The lab numbers tell you what the putting surface itself can do under controlled conditions. Your green's real speed comes from how it's built and maintained, and it will change a little with the weather.
The gotcha Ask any green installer where their speed number came from. A real number has a test method and conditions behind it. A number with neither is a sales line.
How AJ Turf handles this
We build greens with a fringe ring, cups placed where you want to putt, and a shaped, compacted base so the ball rolls true. We tell you the measured lab data for the putting surface and walk through the infill and build on site, instead of promising a speed. Greens are priced at the free onsite estimate.
Questions people ask.
Can I make my green faster later?
Speed comes from the surface, the infill and how it's brushed and rolled. Infill and brushing can be adjusted over time; the putting surface itself sets the range.
What infill goes on a putting green?
Fine rounded silica, with 30/50 mesh the standard grade sold for putting greens and #60 mesh at the fine end. The lab test above used 60-grit sand at 2.5 pounds per square foot.
Does a putting green need a fringe?
A fringe of slightly taller turf around the putting surface gives it a finished look and a realistic edge to chip from. We build it as standard.
Updated 2026-10-13
