A backyard putting green is the dream of many golfers. Installing a backyard putting green is a feasible project for homeowners. Installation of a real grass and sand putting green involves first selecting the best site for your future green. You will have to test the soil pH, possibly adjust the pH level and contour the ground to allow for proper drainage. Specific grass types will yield better results. After sowing seeds, the sprouting grass will need watering, and eventually, fertilising and mowing. Finally, the green will require regular maintenance.
Locate a source for your grass seed. The best seed for a backyard putting green, and the seed most frequently used for professional golf course greens, is creeping bentgrass, which you can obtain from a local nursery or garden supply centre, or order from an online retailer.
Select the site for your backyard putting green. Look for a spot fully exposed to sunlight from sunrise until sunset, and where water will drain off the future green. Avoid positioning the site of your future green in low areas where water will collect. Also, select a site where the air flow is consistent and unfettered; avoid areas where trees or crops will block wind and air flow.
Test your soil to determine if you need to adjust the pH level before sowing your grass seeds. PH is measured on a scale of 1 to 14, with 7 indicating neutral soil. Neutral soil is optimum for growing grass seed. If your soil test indicates the soil is a pH level of 6.5 or lower, the soil is acidic. Adjust acidic soil by adding ground limestone. For alkaline soil, with a PH level of 7.5 or higher, supplement with sulphur additives. Consult a local lawn care expert for the best products and methods for adjusting pH in your area.
Loosen the top 6 inches of soil with a rotary tiller. Depending on your soil's drainage, you will likely need to supplement with a sandy loam. Your grass putting green will require good drainage.
Prior to sowing your grass seed, shape your putting green so that water will not collect or puddle anywhere on the green’s surface. Use a shovel and a metal rake to spread and shape the soil. Fill any low spots in the soil bed, and make sure that any contours are shaped so that water drains off the eventual green. Standing water will greatly increase the grass’s susceptibility to disease.
Use a metal roller filled with water to compress the soil. Roll the roller over the soil surface of your future green to work out any soft pockets and create a firm, stable surface for your grass seed.
Sow your grass seed. Sow the seeds at a rate of ½ pound of grass seed per 1,000 square feet. Cover the seeds with a ¼-inch layer of topsoil.
Water your green site frequently until the grass is established. For the first 3 to 4 weeks, spray the sowed grass seeds with a fine mist of water for 10 minutes, 2 or 3 times each day. Wait until the grass is between 3 and 4 inches high before attempting to mow.
Once the grass is established, mow it to a length of ¼ inch, 2 or 3 times per week.
Water the green whenever the grass begins to show signs of stress: when the grass begins to wilt slightly, lose its colour, or recover slowly from footprints and mower tracks. Water your green in the early morning hours, between 5 and 7 a.m.
Fertilise the green, typically twice in the early summer, and twice in the fall. Specific dates for fertilisation will vary from region to region. Using a spreader for even application, apply a nitrogen-based fertiliser suitable for lawns at a rate of one-half pound per 1000 square feet.
Top dress your putting green with topsoil in early summer and early fall. Apply a 1/8-inch layer of topsoil to the green and use a push broom to spread it evenly over the green and work the soil down into the grass surface.
Find a lawn-care expert to consult for localised advice. This could be a nursery person, a lawn care professional, or a greens-keeper at your local golf course. Creeping bentgrass is susceptible to a variety of ailments. If your grass green starts to show signs of disease, consult your expert for help with diagnosis and treatment.