2026 Summer Aeration Update

As we wrap up another successful aeration week, we would like to thank you for your patience and understanding while GCM completed these important annual maintenance tasks.

Aeration is one of the most beneficial practices we perform each year to maintain healthy turf and provide exceptional playing conditions throughout the season. By relieving soil compaction, improving air and water movement, and encouraging deeper root growth, we're investing in the long-term health of the golf course. We close in July to aerate FW's while the warm season Hybrid Bermuda is actively growing. This July's weather facilitated a small tine aeration of the greens as well.

What you can expect on Saturday when the course re-opens is putting surfaces showing some small aeration holes and a little sand. We will mow and roll the greens through the weekend, however expect slower surfaces but true. Fairways will have a tan appearance to them from all of the aeration and topdressing practices, and they'll be a bit sandy but lies will be very good. They might be a little wet in some areas as we need keep them hydrated with the presence of open holes which can accelerate soil drying. A picture is worth a thousand words so below are photo's of the week, outlining the process for those who are interested.

Greens Aeration

The first step in the  greens aeration process is to actually aerate the greens. Above is an example of greens aeration using a Toro Procore 648 Turf Aerator an industry standard. We set up the aerator with 1/4" coreing tines fitting with our philosphy of small hole but more frequent putting surface aeration. Small holes are less disruptive to the surface and therfore recover much quicker then larger more traditional greens aeration holes. This process is a poa annua prevention strategy as well along with putting quality strategy as small holes dont effect ball roll as much and recover rapidly limiting poa's germination.

The next step is to remove the cores extracted from the surface with the Procore. We recently had an oppurtunity to rent a core sweeper that significantly reduces the strain of processing cores developed during aeration. Above depicts the Pure Turf Core Sweeper working in tandom with the Toro Procore Turf Aerator and our own GCM partners with blowers keeping the process clean and tight.

Following the cleaning of the surface we apply sand topdressing with a Toro Propass 200 Series Topdressor. Applying topdressing sand to the surface is crucial as it fills the aeration holes for stability & surface firmness and it dilutes the excessive organic matter that putting surfaces are prone to develop.

Aftery some drying of the topdressing sand we use a GreensGroomer Brush to work the sand into the aeration holes and turf canopy. This brushing process can be hard on the surface if applied excessively. Therfore we dont try to apply too much sand in the  first pass of topdressing which would require the damageing excessive brushing. Experience has taught us to make subsequent light applications of sand to completly fill aeration holes and brush this light amount in, limiting the bruseing it can cause to the surface.

We had the oppurtunity to let the greens rest  after all of the above mentioned aeration processes this week as we were closed Monday 7/6/26 through Friday 7/10/26. Normally when we do this 1/4" aeration process to the putting surfaces, we do it on a closed Monday and need to prep the greens for Member play the following Tuesday. Here we are on Friday rolling the greens for the first time since aeration on Monday. Rolling will help the sand settle in, smooth and prepare them for mowing ahead of Member play on Saturday

After the rolling we go ahead and mow the surface for the first time since Sunday. We can get away with this being closed for a week but as I mentioned above, normal circumstances opening on Tuesday after a Monday 1/4" aeration event we have to prepare surfaces for Member use.

Above is a fair representation of the greens Members will encounter on Saturday when the course re-opens. Small 1/4" holes wont deflect ball roll, but speed will be down for at least a week longer

Fairway Aeration

Flagging irrigation heads and valve boxes is the first step in any aeration process as aeration equipment will destroy irrigation heads and must be avoided. Even with all of the proactive work of flagging heads it is enivitable that some of them will get clipped with the aerator and require replacement. 

Granite Bay is blessed to have two Toro Procore 1298 Turf Aerators for aeration. Having two big aerators allow us to get allot done rapidly in the AM so when daybreak arrives the extracted turf cores start to dry out and we can start to process them. Dry conditions are crucial for the remaining processes of verticle mowing, sand topdressing and brushing. Above depicts the two Procore 1298's extracting cores on #9.

We took advantage of the flagged irrigation heads this aeration cycle and trimmed the overgrown turf from them. This will allow us to identify the low heads so we can start the process of raising and leveling them.

We added Vertical Mowing to this years aeration process with the goal of getting the Santa Anna Hybrid Bermuda  fairways into a more upright growth habit and at the same time removing thatch or excessive organic matter. The entire process of aeration and vertical mowing must be done when the Santa Anna is actively growing which is the primary reason we close the golf course the week after the 4th of July. 

Here is a good look at the verticle blades of the vertical mowing units for our fairway mower's. The blades are set to go down almost 1/2" removing thatch and cutting the lateral stems or stolons of the hybrid bermuda plant. This encourages new sprouts from severed stems and promotes an upright growth habit.

Above is a good look at the fairway surface after core aeration and verticle mowing

The next step is to sweep up all of the thatch and debris removed from the aeration and verticle mowing process.

We left piles of this thatch and debris in native areas near the holes we were aerating. We do this because time is of the essence during this process and we need to complete the entire job in the allocated closure time of one week. It would take too long to drive the sweepers across the course to dump on the corner of Barton Road. We will come back and remove these piles next week.

After the sweeping  process we use a mower to cut the bermuda plants that were stood up from the sweeping.  Mowing at this point creates  more oppurtunities for sprouting of new plants and upright growth.

After aeration & Verticle Mowing cleanup and mowing we start to add topdressing sand .

After adding the sand we like to let it dry a little and then brush it into the turf canopy.

Here we are brushing in the fairway topdressing sand.

Above is a fair representation of the fairways Members will encounter on Saturday when the course re-opens. This is #1 which was done early in the process so will be a little farther along then subsequent holes. You'll see some brown, you'll see some sand which will mostly disappear by next week.

We appreciate your continued support and understanding as we care for the Club's greatest asset. We in GCM take great pride in maintaining the course, and we're excited to welcome you back to enjoy it.

The Cygnets Have Arrived

Congratulations to all of us new step-grandparents. as our adopted pair of  Mute Swans have hatched their first flock of cygnets. The linked article, Baby Swans: All You Need To Know is a very informative article. If you're interested you should checkout and prepare for what comes next with our new arrivals. We will of course document what we can.

In other golf course news, we deep tined and sand top-dressed greens this past Monday 5/25/23. Pictures below are worth a thousand words. 

The first sighting of the hatched Cygnets was Friday 5/27/23 by Ken Roberts captured here. 

I immediately put the flying camera up to confirm our numbers and am happy to report we currently have six healthy Cygnets. 

Here they are a day (?) old on Saturday 5/26/23 frolicking and feeding with their parents. Photo captured by GCM employe partner Amanda Bergstrom.

This photo was taken Monday 5/22/23 before we became aware of the new arrivals. Geese were nearby on #9 fairway and possibly chased out of the pond by protective parent. 

Other GBGC Wildlife News

I suspect the pair above or at least the brown wren were the parents of the eggs in birdbox behind #11 tee that I highlighted last week. This was taken right above the location of the bird box. 

Unfortunately, when I checked the birdbox on Friday it was empty with no remnants of shells or anything in or below the nest. I thought parents might have moved the eggs because of my poking around and then  found out that wrens will move eggs for various reasons. Check out the below link.

Wrens Can Be Nasty Neighbors

Deep Tine Aeration

Enrique deep tineing or aerating the greens on Monday 5/25/23. 

These long tines penetrate 4 to 6 inches into the putting surface allowing much needed air to the rootzone facilitating deeper irrigation infiltration at the same time. Great practice that doesn't effect putting quality. This and similar practices need to be done frequently if we are going to avoid the more traditional, aggressive aeration practices in the future.

As you can see here this practice will not affect putting quality.

In addition to, and even more importantly, if we are going to avoid aggressive core aeration in the future with these new green's, we will need to frequently apply light dustings of sand to dilute the organic matter that a bent grass putting surface produce's naturally. The targeted amount of sand prescribed by the USGA Annual Sand Topdressing Amounts is anywhere between 25 and 30 cubic feet of sand per 1000 square feet per year. We are targeting 30. The above and below pictured application represents approximately 1 cubic foot per 1000 square feet. It is difficult to achieve 30 cubic feet per year just with light topdressings like this. It is easier to achieve if you aggressively aerate twice per year, but we are trying to avoid that if possible. We will need to get a little more aggressive with aeration such as a closer pattern of holes of either solid or coring to A - mechanically remove organic matter and B - allow for more topdressing sand incorporation helping reach the target of 30 cubic feet of sand per year.

After the 1 cubic foot application of topdressing we typically brush the sand into the putting surface followed by a little irrigation to push it down further, and a deep irrigation cycle the proceeding evening to push it even further. The next morning, we typically roll and blow the greens only to mitigate sand harvesting with the mowers, then try to roll first followed by mowing in the subsequent mornings which helps with the sand harvesting by
the mowers as well.

The Best Is Yet To Come. Thanks for your support!

Golf Course Maintenance Weekly 3/14/16

Spring Aerification Schedule

After two weeks of rain it now looks like as though the weather is going to cooperate with our aerification schedule for next week. After receiving over 4.5" of rain here at The Club over the past 10 days, the extended forecast is for dry weather with some days in the 70's. This forecast will likely bring the necessary dry conditions for putting surface aerification next week. Fairways might still be a little wet in spots but we should be fine. Below is the aerification schedule for the next  two week's.

To get all the holes filled with sand during the
aerification process we typically follow
mechanical brushing with 

Another labor intensive task of the aerification process
is the removal of the aerification cores during core aeration.

Tuesday 3/22/16 - Putting Surface Aerification Course Closed

Wednesday 3/23/16 - Fairway Aerification Front Nine Closed

Thursday 3/24/16 - Fairway Aerification Back Nine Closed

Tuesday 3/29/24 - Surrounds Aerification Front Nine Closed

Wednesday 3/30/16 - Surrounds Aerification Back Nine Closed

Thursday 3/31/16 - TBD Aerification TBD Closure 

Driving Range Improvements

The driving range has some improvements slated for 2016 and we are planning to get started on some of it this week. The overall scope of the improvements include a short fence along the left hand side of the range near the treeline to catch a large portion of range balls from proceeding past the OB line into #18. Additionally to solve the synthetic tee line drainage issues we need to reconfigure the irrigation of both driving range tee sprinklers and the turf area behind the driving range. Additionally we have some drainage panels to put under the synthetic tee line that will raise the mat slightly and allow for drainage from irrigation drift, (now that we have reconfigured direct irrigation) and rainfall. Also we have new bag stands coming which will add to the entire refreshment. 

We need to aerify the turf on the range as well along with other maintenance items which are impossible to do when the range is open. Therefore we will need to close the range at some point for a day or two which has yet to be determined but we will communicate far in advance. The work we hope to get started this week is the irrigation reconfiguration which no closure will be required.

Five gates still open this morning (Monday 3/14).  Reservoir is coming up
a little according to below FR chart.

Drought Update

There is really nothing to update other then believe it or not we are still technically in a drought despite all the rain and decent snow in the mountains. This drought has allowed  the State to move to a new normal in CA water use and I still believe it is and will be the defining issue not just for GBGC but for golf in the entire state moving forward. That being said you would think we would get some relief in the coming year when you look at the data below.

Slight up tick after the weekend storms 

Shasta now 103% of historical average and Oroville at 97%.
Great news for the State of CA.

Snow is slightly up from last week as well.

Monday Spiking

A typical task for your GCM department on Mondays is spiking the greens. Spiking allows necessary air to penetrate the root zone helping with surface drainage and rooting.  

The holes produced by the spiking are >1/4" and do  not effect putting quality especially after rolling. 

We typically incorporate vertical mowing into the process as well. Vertical mowing thins out some leaf blades at the surface helping with smoothness. 

The finishing touch to the process is a light top dressing, almost dusting of sand. This sand incorporates into both the vertical mowing lines and spiking holes to aid in additional smoothness. 

Multiple variations of this process are practiced every week ahead of Monday events. Sometimes we will skip the spiking, sometimes the verticle mowing. Sometimes we inter seed bent grass seed into the process (more about this process in a subsequent post). We typically apply a light dusting of sand every Monday helping to keep the surface smooth and dry even if we skip some of the other processes.