Ball resting against green/collar transition |
Our initial thought last fall was to gradually lower the mowing height of the collar to transition it to greens height, therefore making each green slightly larger and the collar more narrow. As we began lowering the mowing height on the inside portion of the collar, it became very evident that scalping was going to be a major issue and that a different approach was necessary.
A few weeks ago we began trying a couple different methods to minimize the transition which will allow us to begin reducing the width of the collar. (click on pictures for larger view)
Test #1: Strip Sod
This method will provide immediate results and decent playability but will take a significant amount of time and labor. The process involves stripping all of the collar, removing excess material (soil) to help the new soil level match the level of the green, re-laying the sod, tamping, watering and rolling. It took three individuals approximately 3 hrs. to complete the process on only half of the big putting green by #1 tee.
Strip existing collar |
Remove material to lower the level of the collar |
Re-lay sod in its previous location and tamp |
Finished product after watering and rolling |
Test #2: Aggressively Aerify the Collar
This method will take a little longer to achieve the desired results, but the process itself is very fast and is expected to take less time and labor to complete. The process involves 2-3 aggressive aerifications of the collar within a month or two, removing the cores, heavily watering the collar to soften it then driving over the saturated collar with a tractor to lower the level of the collar to the level of the green. It took two individuals approximately 30 minutes to complete the process on the other half of the big putting green by #1 tee. Keep in mind that this is not the final result we are wanting to achieve. This process will need to be done 1-2 more times to get it to the point where it matches the current condition of the collar that was done with the other process.
Drive over saturated collar to begin lowing soil level |
Aerify the collar and a small portion of the gree |
A couple of points to consider:
Test #1: This is not a perfect process. Sod seams will be visible and there may be some inconsistencies with evenness until the sod fully matures (this process is similar to the stripping and re-laying of the sod on #18 green).
Test #2: Holes will be visible for a period of time as we want to encourage the soil to fill the holes leading to additional settling of the collar. If the minimal amount of holes on the green itself is a concern, we will need to fill them with sand, lengthening the amount of time it will take to achieve our goal.