Category Archives: Wine Growing

How to predict harvest date – Growing Degree Days/Bud Break/Veraison…Part II

Truck with grapes
As I sit here in October I’m reflecting on the year and trying to determine additional changes to make for 2014. I have been tracking milestones in the vineyard to determine if I can predict the harvest date early in the year…and it looks like with 2 years worth of data I can (so far).

Year                                       2013             2012           Difference

Bub Break                                3/5               3/20            -15
Veraison                                  7/8               7/21            -13
Harvest                                   9/11              9/23            -12
Brix Adjustment                      23.5              23.0            -3
Brix Adjusted Harvest                                                    -15
Growing Degree Days            2000            1786           -14

Wow…back in March I could have predicted the harvest date in September!  Better yet…if I track Growing Degree Days throughout the year it will let me get an idea of the harvest date early…all this is assuming no big heat spikes!

One last item….back in April last year I predicted 2.75 tons of grapes  based on a simple formula of pounds per grape and we came in at 2.61.  Not bad….for 2014 I’m going out on a limb and predicting 4.2 tons.

 

2013 Vineyard status and Improvements for 2014

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2013 TURTLE VINES VINEYARD

– For 2013 we harvested 5199 pounds of grapes this year vs an estimated 1190 pounds in 2012! We hope to eventually harvest around 11,000 pounds.
– By carefully restricting the water from set to veraison, we were able to reduce the pH at harvest from 3.9 to 3.76 even while harvesting at a higher brix! Still need a ways to get to optimal winemaking.
– With the help of Patrick Hamilton, a SRJC student, we staked up the irrigation hoses, eliminated twins and improved the cane pruning process.
– Our gopher population increased dramatically over recent years but so did our capture rate. Twenty three as of this date.

IMPROVEMENTS FOR 2014

– Remove mystery vines and weak vines in the fall or spring
– Outsource to Wilkinson Vineyard Management some of the more labor intensive operations.
– Improve the process of harvest as we will have around 4+ tons of grapes.
– Decrease further the potassium uptake with prudent watering and magnesium supplementation of the soil.
– Implement a petiole analysis program.
– Add a second irrigation hose to around 20 rows in the vineyard for the weaker vines.
– Investigate biodynamic vineyard practices

 

2013 Harvest – Turtle Vines Pinot Noir

Harvest 2013!

2012 was our first harvest, and we made wine with the 1190 pounds, which turned out great!

This year we picked 1037 pounds on Tuesday Sept. 10th just for us and our wine and sold the rest of the grapes.  The rest we picked on Wednesday Sept 11th.  Wilkinson Vineyard Management showed up at 10:15am with 13 pickers.  In 1 hour 45 minutes they finished the entire vineyard.  They ended up with a little over 2 tons, split 0.8 tons 667 Clone and 1.3 tons Pommard Clone that was delivered to Horse and Plow Winery. So…with both picks we harvested 2.6 tons!

Here is a picture of our truck and borrowed trailer delivering the grapes.

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Awaiting the final weigh tag.

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Joey harvesting for our wine.

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Setting up the destemmer.

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First punch down of grapes with 30 ppm sulfur before they get 5 days of cold soak.

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2013 Growing Season

9-6-2013 pinot clusters

2012 was the perfect growing season…a lot of rain in the winter, a warm spring and not to warm during the summer and fall.

2013 was a little more challenging but I think our fruit is actually better this year than last year.  We had almost no rain from the beginning of the year.  This caused bud break to be 3 weeks early.  Then in June we had 2″ of rain and a very hot 5 days following.  Mildew pressure was high.  And then…was very cool in July and early August returning to normal temperatures the end of August and early September.  This allowed the flavor to catch up to the early ripening.  An then…a heat wave just before harvest on September 7-9.  Havrest was still early on Sept 11th, but the fruit was very flavorful and retained a good amount of acid.  Unlike 2012 where everything went smooth, this year you had to fight but ended up with great fruit.

 

 

9-6-2013

2013 Pinot Noir

Wine stuff

 

I have not posted in a while, so I’ll give you a little update on how our 2013 Pinot Noir crop is shaping up.

Three weeks ago we finished veraison so the nets went up to prevent the birds from getting our crop.  Only took 5.5 hours this year top put them up…better than 9 hours last year.

Sunday Joey and I took brix (sugar) readings throughout the vineyard.  As expected the vines closest to the house averaged 20.4 and the ones furthest away were at 19.3.  We expect to pick when the brix reach 23…so around September 16th!

Now the fun part…as you can see from the picture, we bought a small bladder press.  The capacity is 42 gallons, or enough for 1/2 ton of fermented Pinot Noir, or around 400 pounds of Sauvignon Blanc.  In addition, we bought 2 thirty gallon breathable tanks for aging, and some 5, 3 and 1 gallon glass containers.  Next up is to get a destemmer and a few smaller items and we will be set to make wine this year!

 

Clone 23?

Mariafeld Clone 23

 

I have a few dozen loose cluster Pinot Noir vines in the vineyard (out of 3100).  I always wondered what they were.  In fact the viticulturist from DeLoach was over last week and he confirmed they were Pinot but didn’t know which clone.  So…in researching I could only find one loose cluster Pinot that was available from the nursery where I purchased all the vines…and that is Clone 23, otherwise known as Mariafeld.

I found this description of the vine.  “Clone 23 is interesting in that the cluster and berry sizes are much larger than most Pinot clones.  It always provides dark colors, very bright, fruity flavors with high acidity.”  In addition, due to the loose clusters it is resistant to botrytis and if needed will allow you to let the fruit hang longer on the vine.

So, I think the mystery is solved and it seems to be a very nice addition to the Pommard and 667 Clones at Turtle Vines!

For comparison, below is a normal Pommard Clone.  Notice how tightly spaced the cluster is relative to the Mariafeld clone above.

Pommard Clone 4

 

Row Orientation – It was worth it!!!

row orientation

 

For the first time I really saw the benefit of our 42 degree from N/S row orientation.  The end of June/beginning of July it was very hot here in Sebastopol, >90 degrees for a week.  Very unusual for this early in the summer and it set records in several of the cities around us.

A lot of my friends with vineyards experienced sunburned grapes but we didn’t.  Why…around 1pm when the sun is directly overhead, our grapes are positioned so the sun shines down the row and not across.  (the above picture shows shade at 11am) So very little sun is shining directly on the grapes.  My friends rows are N/S so they get sun on the grapes when it is the strongest…and they get sunburned.

I guess that extra 25% cost was worth it!

PS  Later in the year if the temperature of the grapes gets above 95-100 degrees, the enzymes start to “cook” and you will lose flavor.  Another reason for the row orientation.  Let’s hope we get a very warm but not hot rest of the summer.

 

Veraison 2013!

veraison 2013

 

Just walked outside and noticed we have started veraison, where the pinot grapes turn from green to a very dark purple.  This means the countdown to put up the nets and harvest has started!!!

Everything this year is ahead of last year and veraison is no different. Last year it was July 21st and this year it is July 8th, so I’m expecting harvest somewhere between the 10th and 15th of September.

What do I have to do between now and harvest?
– Continue to spray for botrytis and powdery mildew until the nets go up
– Final pass on shoot positioning, leafing and drop fruit
– Design net tool and test
– Put up the nets around Aug 1st
– FIND Winery to buy grapes!!!
– Harvest

 

CCOF Certified !!!

CCOF Sign

I just received my CCOF Certification!  Only 3% of the grape growers in Sonoma County are certified organic, so I’m joining an elite group.  In addition, Turtle Vines is probably one of the southern most vineyards in the Russian River Valley, which makes it much more difficult due to our propensity of fog.

In short, what did it take:
– Growing organically for 3 years
– Keeping accurate records of the fertilizers and sprays used
– Filling out a 30 page application
– Getting audited
– Paying $900 in first year fees and about $400 thereafter
– Registering with the California Department of Food and Agriculture

Would I do it again…for sure. Healthier for me, the soil and the grapes.
Has it been a challenge…yes. Probably sprayed twice as often at a much higher cost per spray, and your options if things go wrong are much smaller
What did I learn…You have to plan more in advance and perform more research on how to solve issues. I think this is good farming and better for my brain.

Lastly, for all of my high tech friends…was this as tough as ISO 9000/14000?  I don’t think the paperwork or audits to be Certified Organic are difficult, but you have to live being organic every day.

 

 

 

 

 

1-2 Inches of Rain in June? Botrytis Alert

pinot big

 

Botrytis is a fungus that infects grape shoots, flowers, leaves and fruit.  If your vineyard gets this fungus, think of a moldy melon, yuck!  Why am I worried now?  The spread of the fungus sportes is aided by summer rains, heavy dew and juice from split berries.  The popular song…”it never rains in California”… is normally correct for Sonoma County.  However, a rare storm is heading our way and will drop 1″-2″ of rain on the vineyard.  Now I have to worry about Botrytis.

What can be done to prevent Botrytis?
– Have grapes that are not tightly packed. Sauvignon Blanc (see pictures) has a loose cluster but Pinot Noir (see picture) is a tight cluster grape, bad.
– Remove excess shoots and leaf around the cluster to get good air flow – done!
– Organically spray with Stylet Oil, Serenade Max or Sulfur right after it rains. I will do this Friday. Hope it is not to late.

Well the good news is that I needed the rain…the bad news is I may get botrytis in addition to driving potassium into the berries since we are between set and veraison. Lastly, if you look at the Sauvignon Blanc pictures…we will have a great crop this year!!!

Pinot Cluster
pinot bunch
Sauvignon Blanc Vines
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Sauvignon Blanc Cluster
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