Battling the Summer Heat on Bentgrass Putting Greens
By Rob Dreesen, BVCC Golf Superintendent
As the temperatures continue to rise, you will notice our attention to greens rising as well. You will often run into “greens checkers” as you play your round. Contrary to popular belief, we are not trying to get in your way and ruin your round! We are simply just protecting the plant from dying. It is a complex process that is much more complicated than just watering the greens at night. We have to maintain adequate moisture throughout the day and also cool the plant when necessary.
Some of the courses throughout the POA use moisture meters to help determine what amount of water the plant needs. You will see the greens checkers carrying devices that look similar to a pogo stick. Other courses have different techniques that they use to determine what needs to be watered and what doesn’t. But we all have a common goal in that we strive to keep the greens as dry as possible without causing stress to the plant.
Another similar technique is “syringing” the greens. Syringing can also be called, misting. When we mist the greens we are simply keeping the plant cool. Research has shown that when you disperse a very light layer of water over the surface, it cools the plant by 10-15 degrees! Think of a misting fan or machine at outdoor restaurants or on the sidelines of a football game. These are there to keep people cool. This is the same approach we are taking on the greens, which can have a huge effect on the health of the plant.
By spot watering and misting greens throughout the day, we prevent the greens from being overwatered. If we only used our irrigation heads at night, we would be overwatering the plant which would lead to the following effects:
- Plant Health
- Roots shrink, causing the plant to be stressed
- Areas with excessive water are warmer than areas with adequate water, causing the plant to be stressed
- Greens are soft causing the mower to scalp, causing the plant to be stressed
- Golf Playability
- Greens are soft, causing more ball marks
- Greens are soft, causing slower and inconsistent speeds
As you can see, hand watering and syringing throughout the course of the day is necessary for all of us to achieve our goals of having firm, healthy, and smooth putting surfaces. Please keep that in mind on the next round that you run into a greens checker. It is our goal to have the healthiest and best putting surfaces than we can, while also staying out of your way and letting you enjoy your round. However, time is critical, and sometimes we will need to get the green watered before you hit your shot into the green. We try our best to not disrupt the same group over the course of your round, but in the case this does happen, we apologize and it is certainly in the best interest of keeping our turf healthy. Thank you for your patience during these hot and very critical days.
If you have any questions please don’t hesitate to talk to us while on the golf course. We will be happy to answer any questions that you may have.