Backyard putting green care through a Northern Colorado year

01What does a backyard green need, season by season?

Two jobs run all year: even sand and a clean surface. FieldTurf Landscape, a turf maker, says the amount and condition of a green’s infill directly affect how the ball rolls, and that even tiny debris such as seeds or small twigs can affect a putt (FieldTurf Landscape). Synthetic Grass Warehouse’s installer columnist puts the sand rule plainly: more infill firms the surface and speeds the roll, while too little lets it wrinkle and slows it down (Synthetic Grass Warehouse). He recommends inspecting a green every season (Synthetic Grass Warehouse).

NOAA U.S. Climate Normals, 1991–2020 (Fort Collins, Greeley UNC).

At each change of season, re-test the roll as the last section describes; measuring speed is in our stimp speed guide.

02How do I bring a green back after winter?

Wait for a dry, thawed stretch, then work in this order:

1. Clear what winter left. FieldTurf Landscape’s spring advice is to rake, brush and rinse; get debris off before you brush it into the sand.
2. Check the sand. Part the fibers with your fingers: the infill should clearly cover the backing, FieldTurf Landscape says. The Synthetic Turf Council’s field guidelines use a nail and tape measure on a grid (STC). Look hardest where you stand to putt and around the cups, where Synthetic Grass Warehouse’s columnist says foot traffic leaves dips and slow, uneven patches (Synthetic Grass Warehouse).
3. Top up only when the green is bone dry. Sand dropped into damp fibers sticks to them instead of falling to the base, he writes. Spread thin passes with a drop spreader, east to west then north to south, and broom each one in.
4. Roll it on a warm day. A water-filled lawn roller, bought or rented, compacts the sand for a consistent speed (FieldTurf Landscape); cold fibers are slow to press down. Cross the green in many directions: 12 to 6, 3 to 9, 2 to 8 and 10 to 4 on a clock face.
5. Check the cups. The columnist says cups set in compacted dirt shift as rain, foot traffic and pulling the flag loosen the soil, and can settle or push up the surface around them. He recommends concrete, and performance concrete where frost heave is high.

03How do I clear cottonwood cotton and fall leaves without blowing the sand out?

CSU Extension’s PlantTalk Colorado says female cottonwoods shed their cotton in June, often so heavily that nearby lawns turn white, and the cotton carries the trees’ small seeds (PlantTalk Colorado). Seeds are exactly the debris that knocks a putt off line; FieldTurf Landscape suggests clearing a green daily or before each use.

• Blow it gently. High air pressure can displace or remove infill (FieldTurf Landscape). Use low throttle and aim across the surface, not into it, as the Synthetic Turf Council advises for fields. Motz, an infill maker, says a blower held about 12 to 18 inches above the turf should leave the infill in place (Motz).
• Skip the shop vacuum. It can’t tell cotton from sand.
• Let wet cotton dry. Motz says a blower struggles with leaves clumped after heavy rain, and soaked cotton mats the same way. Wait, or lift the clumps by hand.

Fall is the same job with bigger debris. The Synthetic Turf Council says leaves left on a field work into the turf and compact the infill; FieldTurf Landscape says leaves left over winter can rot into a layer that encourages moss. Tools are in our guide to leaves on artificial turf, and moss in does artificial turf get moldy.

04What do summer heat and storms do to a green?

Heat. NOAA’s Greeley UNC station, the nearest to Greeley and Windsor, averages 58.3 days a year at or above 90°F; Fort Collins averages 29.5 (1991–2020 normals). Synthetic Grass Warehouse’s columnist says turf expands as it warms and that heat can wrinkle putting greens especially; the sand’s weight holds the surface still. Top up thin spots before July, not after a wrinkle shows (wrinkles guide). For surface temperature, see how hot artificial turf gets.

Downpours. Most putting green turf is made without drainage holes in the backing, and on a green built dead flat, storm water can be trapped by the fringe (Synthetic Grass Warehouse). FieldTurf Landscape says infill can wash out in heavy rain, and the Synthetic Turf Council advises checking it afterward for sand that migrated with the slope. Sand piled along the low side or the fringe came from somewhere higher, which will roll slower until it’s topped up. Brush it back once the green is dry.

Hail and wind. NOAA’s Storm Events Database logged 536 hail reports in Weld County and 253 in Larimer County from 2011 through 2025. Motz says to pick up sticks and debris particularly after a storm or heavy winds. What hail does to the turf, and whether insurance covers it, is in our hail guide.

05Should I shovel snow off a green or wait?

Wait, most of the time. NOAA’s Fort Collins station averages 51.4 inches of snow a year and Greeley UNC 34.9. FieldTurf Landscape says to let snow melt and drain away, to clear a path only with a plastic shovel or, for light powdery snow, a leaf blower, and never to use a metal shovel or rock salt. To putt the day after a storm, push the snow off with plastic, blade held a little high (snow removal guide).

Leave the roller and the sand in the garage until spring: rolling wants warm fibers and a top-up wants dry ones. Fort Collins averages 150 nights a year at or below 32°F; what that freezing and thawing does under turf is in our winter guide.

06Checking the roll: is a bump in the sand or in the base?

Don’t trust your eye. In a 1990 USGA Green Section Record article, researcher A. Douglas Brede reported that most students he tested couldn’t tell a 2.2% slope from level (USGA Green Section Record). Let golf balls do the looking:

1. Pick a line you putt often and roll three balls down a ramp from the same spot, so each starts at the same speed: a stimpmeter, or a grooved board propped at one end.
2. On a true surface the balls track the same line and stop close together. Balls that hop, or all bend at the same place, have found a high or low spot. Mark it with a tee.
3. Roll the line from the other end. A kink that shows from both directions is in the surface, not your ramp.

Then read what you found:

• A new green still settling. On fields, the Synthetic Turf Council says infill settles over several months of use and rain. Expect a new green to change through its first season.
• Sand. Dips where you stand to putt, slow spots around the cups, fibers flipped up. The fix is checking the sand depth and rolling the whole surface.
• Base. A ridge or hollow that returns after you have topped up and rolled is under the turf. Synthetic Grass Warehouse’s columnist says runoff from outside a green often seeps under it and causes settling, and lists frost heave among the causes of green failures. On a clay lot, add the ground itself: the Colorado Geological Survey says expansive clays can swell up to 20% by volume when wet. Base work means lifting the turf. Our putting greens page explains how the base sets the roll; see also sinking and low spots.

07What should I ask about aftercare before a green goes in?

• Which sand, and how much? A good answer names the product and the amount per square foot, in writing, so a top-up years later can match it.
• Was it rolled, and to what speed? A good answer gives a number you can re-test against.
• How are the cups set? In concrete, by Synthetic Grass Warehouse’s advice, not compacted dirt.
• Is there a service visit? FieldTurf Landscape says many installers offer an annual maintenance service that deep cleans the surface, checks the seams and tops up the infill. Ask what a visit covers on a green, rolling included.