2026 Fall Putting Surface Aeration

 We have communicated on many occasions our strategy for aeration on our what are now our 5 year old re-surfced putting greens. This strategy is to conduct small hole non disruptive aeration strategies on the putting surfaces frequently throughout the year. So far this year we have used the the very discreet and extremely effective Air2G2 process 8 times throughout the year on closed Mondays. As the pictures below depict, using an Air2G2 machine injects blasts of air deep into the putting surface fractureing tight sand layers allowing bentgrass roots to stretch deeper, create more root mass and the ability to dry down the surfaces more readily leading to better performance in the way of firmness and subsequent ball roll.

The beauty of using the Air2G2 is it does not disrupt the surfaces at all yet aids in creating a healthy rootzone deep in the green core. We are seeing results in rooting depth and mass and  plan to continue this process for the remainder of 2026 as well as planning for a minimum of monthly Air2G2 applications in 2027. 

Air2G2 fits right into our strategy of small hole frequent aeration on these putting surfaces however the process will not remove excessive organic matter or what we have all heard commonly refered to as thatch. Excessive organic matter can be detrimental to the health of a putting surface and the main process for removal of this organic matter is core aeration. We still focus on small hole aeration but unlike Air2G2 which has virtually no surface disruption, small hole coreing has minimal short lived disruption.

For all who are interested below are some pictures that tell the story of our our small hole aeration strategy here at Granite Bay Golf Club.

Above is an Air2G2 machine. We are fortunate to have access to 2 rental machines and conduct the process at minimum monthly year around. 

This is a closeup of the working end of the Air2G2, the actual air tines that are pressed into the green cavity where a blast of fractureing air is delivered on comand then after raising the tines out of the green we move the maching forward aproximately 24" then lower into the green again, inject high pressure air and repeat the process all the way around and through the green.

The above graphic is what we are experiencing with these greens now and believe with continued regular use we can acheive vastly improved root depth and mass which is more then a good thing with these greens, it is a great thing

Upcoming 1/4" Core Aeration

On Monday 10/19/26 we have another scheduled 1/4" core aeration to do on the greens. Small holes, removing thatch and adding sand is a good thing. Look for greens that are a bit sandy for a few days afterwards and a decrease in speed that will take a week, maybe two or so to get back. Below are some pictures of the process

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.

After the rolling we go ahead and mow the surface after a few days of allowing the topdressing sand to be worked in. 

Daily rolling will help the sand settle in, smooth and prepare them for mowing. The roller is used quite a bit in the process to get the surface back to good putting shape

Above is a fair representation of the greens after a couple of days working this process. Small 1/4" holes wont deflect ball roll, but performance does take some time to re-bound. 

Thanks for your support of our efforts here at Granite Bay Golf Club

2026 Fall Tee and Shady Surround Overseeding

Coming up in just over a week from now on Monday 10/12 through Wednesday 10/14  the GBGC golf course maintenance staff will overseed all of our tee's for winter play. In addition to all of our tee's, we will overseed the hybrid bermuda in the shady green surrounds of #3, #6, rear of #10, #13, #14, rear of #15 & #16. 

The very small footprints of our hybrid bermuda tees and the above listed shady surrounds will not hold up to winter traffic without some ryegrass overseeding. Below are the dates and associated alternating B9 &  F9 closures along step by step overseeding process pictures for those who are interested.

2026 Tee Overseeding Dates

Monday 10/12/26 - Preparation Tees for Overseeding

Tuesday 10/13/26 - Overseed B9 Tees & Shady Surrounds - B9 - Closed

Wednesday 10/14/26 - Overseed F9 Tees & Shady Surrounds - F9 Closed

Overseeding Steps

Step #1 is to scarify the surface of the tee, This scarification process thins out the stand of Hybrid Bermuda allowing space for ryegrass seed to nestle in and make contact with the soil.

Step #2 is to clean up the debris created during the scarification process. Here we are blowing the debris into an accessible area for sweeping up with the big sweeper.

Here we are sweeping

Step #3 we mow the scarified, cleaned up surface preparing it for seeding.

Step #4 apply ryegrass seed. We overseed at a rate of 400 lb's per acre.

Step #5 we topdress over the top of the seed with clean sand.

Step #6 we irrigate  to "push" the sand & seed into turf canopy.

Above depicts the surface after the six step process described above.

And here is the surface a few weeks later after the seed has germinated and surfaces have been mowed a couple of times. 


Thank You for Your Support

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.

2025 Winter Update

Since mid October allot has been going on the golf course with projects and weather and I have neglected updating the Granite Bay Course Update with content. Therefore I will now attempt to catch-up and provide for those who are interested some context to what we in golf course maintenance have been up to.

Weather

What happens meteorologically effects everything we do in golf course maintenance which is why I bring it up in the course updates so much. Weather is never the same from year to year and can be predictable as it is un predictable. It is the one uncontrollable factor that effects golf course playing conditions the most from speed & firmness to turf health & sustainability.

The weather pattern that the fall and winter of 2025 will be known for so far is the return of the local phenomenon of The Unrelenting Tule Fog. According to the preceding linked article tule fog is, 

An atmospheric phenomenon occurring over much of California was unmistakable in satellite imagery in late autumn 2025. Fog stretching some 400 miles (640 kilometers) across the state’s Central Valley appeared day after day for more than two weeks in late November and early December. Known as tule (TOO-lee) fog, named after a sedge that grows in the area’s marshes, these low clouds tend to form in the valley in colder months when winds are light and soils are moist.  

1985, for example, Fresno experienced 16 consecutive days of dense fog, and Sacramento endured 17, according to news reports. Researchers have found, however, that tule fog has been forming less often in California in recent decades. Foggy days are beneficial for the valley’s fruit and nut trees, which need sufficient rest between growing seasons to be most productive. 

Interesting the Tule Fog is beneficial for tree crops however it is not beneficial for sports turf as it limits photosynthesis, the process where plants derive energy as well as the ability of the soil and course to dry out.

Above is a good representation of the foggy conditions that we experienced at GBGC in 2025 from late November until the Christmas Holiday storms as well as after those storms. These type of conditions do not facilitate drying of the golf course which inhibits GCM's abilities to get equipment out on the course to maintain it.

Above is rainfall data derived through December 2025 from GBGC's weather station located near the remote restrooms on #13. December's rainfall total was 8th most in the last 21 years but Novembers total rainfall is tied (2017) for 2nd most in 21 years only behind the 6.18" in 2012.

Despite the 4"+ rainfall we received in mid-November we were able to get carts back on the course after 4 clear days before the fog set in. We did not have to go back to cart path only until the Christmas Holiday storms dumped another 4"+ inches of rain as well as toppling trees. After this storm the tule fog returned immediately not helping at all with wet golf course conditions and following this we have another series of warm storms forecasted to begin the New Year.

This forecast will not help with drying the golf course out but there might be some short term light at the end of the tunnel.

Large Live Oak that toppled during the Christmas Day storm.

The tree toppled onto the back of the maintenance building and required some professional help to get it off the building without causing damage. Fortunately the damage was minimal and the tree has been removed from the building. 

Long Range Forecast 

Warm Subtropical System to Bring New Year Rain Before a Somewhat Quieter Pattern Takes Hold by mid January is the title of a Weather West article which is my go-to for long range forecasting. Excerpts from this recent post include:

December shattered many countless warm temperature records in the U.S. West. This map is not showing a data glitch: it’s showing where Dec 2025 will likely be the warmest on record (all dark red areas, which represents…most areas on the map). One of the only exceptions is CA’s Central Valley and parts of the SF Bay Area where tule fog reigned, though even here subtropical air at the end of Dec brought monthly average temperatures to above average levels (despite the notable damp chill earlier in the month). (climatetoolbox.org)

Looking ahead into January, a relatively active weather pattern may continue for another 7-10 days in California; thereafter, there are hints of a potentially more sustained break in mid-January with a West Coast ridge potentially developing. This is a relatively low-confidence pattern, though, so don’t hold me to it! I’ll be following this more closely in the new year.

Fall - Early Winter Projects

Since our 2021 renovation, GCM has been diligently working on the finishing touches of the project none of which is more important then adapting our irrigation system to improve coverage & control and irrigate our cool season rough independently of the warm season hybrid bermuda fairways. These retroactive adaptions are all part of our Master Plan developed post renovation as a roadmap to complete the many remaining tasks from 2021.  This work is typically conducted in the late fall through the winter, weather permitting and we have made great progress in 2025 as evidenced by the pictures below.

The Fall of 2024, which was the end of last years project completion window, we highlighted in a 2024 Granite Bay Course Update the work of drainage, irrigation, curbing and parking near the chipping green and behind #7 green.  Additionally that update highlighted the parking lot landscaping work we completed to end the 2024 year. In January & February of 2025 the second part of our project window,  we completed 7 blocks of irrigation heads on #2 and #12. Above depicts just some of this work in progress the beginning of 2025 on #12.

Once fall rolled around this year we began doing the same work of retrofitting our current irrigation system with "blocks" of irrigation heads that provide adequate coverage and control to the irrigation of the cool season rough independently of the warm season fairways. Above shows this installation in process near #4 green.

This picture is a really good representation of what we trying to achieve with these "block" irrigation installs to adequately irrigate the rough independently of the fairways. The picture shows multiple small irrigation heads controlled by one valve directed towards the rough and not the fairway. 

Once we were done with "block" installation on #4 we moved to #6 and worked over there for most of the month of November, completely surrounding the rough with these "block" irrigation heads. Because of the slope of #6 we utilized jute netting over the exposed irrigation ditches ahead of the mid November atmospheric river on 11/13 till 11/17. This was done in a abundance of caution to protect the susceptible compacted bare dirt covering a matrix of pipe, irrigation heads & wire. Mission accomplished as we did not have any erosion issues even after 4"+ of rainfall. 

We addressed as well the fairway bunker in the middle of #6 and the cool season turf that surrounds the bunker.

Above depicts the finished product of the work around the bunker awaiting seed germination in the ditches which is slow this time of the year particularly with the lack of sun from the above-mentioned tule fog.

Once we were done with #6 we moved to #2 to repeat the process there. We spent the month of December 2025 working on blocks on #2. 

This work is not just about plumbing pipe and adding irrigation heads. Equally important to the actual infrastructure of the block irrigation heads is the control of the valve the operates this infrastructure. There is always a calculation on how to get a control wire to this valve for these new block heads as control is as key to the plan as the coverage the block infrastructure provides.
Above depicts some wiring work we did on #2 to both facilitate control wires to the new block infrastructures on #2 as well as moving the irrigation controller across the cart path which was something we needed to do to expand some turf in the area.

Above shows the new location of the irrigation controller that we moved just before Christmas on #2.

The installation of this block infrastructure is key to GBGC's long term success. Areas addressed with this same process in 2022 to 2024 include #13, #15, #5, fairway bunkers #2 & #4 to name a few. Even though many members play weekly, the re-call of the before and after of these areas are many times vague. In GCM our memories are not vague as we work with these areas daily and have always strived to provide the best playing and aesthetic conditions for the course to achieve consistent playability, sustainability and sale ability. That is why we are working tirelessly to install this infrastructure as we know beyond a shadow of a doubt how this generational work will continue to transform this golf course.

In 2025 we installed 18 blocks, and we have another 8 we are planning to get done in January to February of 2026, weather permitting. This won't complete all of this work detailed in the GBGC Master Plan but will have addressed most of the worst areas that have been identified. The summer of 2026 is looking up, and yes, despite the gloomy wet & cold we are currently experiencing, Summer is Coming!