Thursday, 28 October 2021

Autumn is here


Our conditions this week have been abysmal. Torrential rains, gale-force winds, dark and gloomy. At least it's been unseasonably warm. And a very strangely quiet Atlantic hurricane season. Thank goodness we put the boat to bed and placed all the sensitive plants in the polytunnel. It's like a jungle in there now. 

Vitis Vanessa is planted in her forever place. The tomato plants are still producing as are the lettuce, courgettes and cuke.  Not much luck with other stuff as of yet. Will soon clean up and start over. 


Tuesday, 26 October 2021

Pomerol bans chemical weed control

Megan Mallen, CC BY 2.0 <https://creativecommons.org/licenses/by/2.0>, via Wikimedia Commons


In France, Pomerol is the first AOC to totally ban chemical weed control. Apparently, Corsica and Provence are considering the same. Moreover, Bordeaux’s right bank appellation has made tillage and grass cover mandatory for vineyard management. Since 1936, the planting of white grape varieties has been strictly prohibited in Pomerol with Merlot (pictured) being the dominant grape in the AOC.

In other news, France has launched an unprecedented year-long study in six wine-growing regions to determine if people living near vineyards are at greater risk of exposure to pesticides. Among the pesticides that will be tracked are glyphosates, folpel and copper, despite the latter being widely used in organic farming. 

Meanwhile, the Sustainable Wine Roundtable wants to define and uphold global sustainability standards but creating a globalized definition and standard for sustainability in wine across all sectors of the industry, from viticulture and winemaking, through packaging and retail, will be no easy task. It's expected to take about 2 years to develop the standards. 

But sustainability just means preserving the status quo. It's much better to improve the soil and biodiversity. Great explanation of regenerative agriculture. 

We might even be able to sell carbon credits

Monday, 25 October 2021

Could the West coast drought be over?

https://twitter.com/i/status/1452473186012983297 


Torrential rains and high winds pummeled the west coast from Oregon to central California dumping record rainfall in an 'atmospheric river' causing flooding and massive problems. Sonoma and Santa Rosa counties had more than 7 inches of rain in a 24-hour period. Mt. Veeder had a whopping 10 inches of rain in 24 hours - most in #NapaValley according to the official tally. Record rainfall after record drought. Climate change is definitely here. The “bomb cyclone” is a rare meteorological event. 

I wonder what effect it will have on the vineyards. At least they had already harvested the grapes. 

One good thing, the #DixieFire has been declared 100% contained @ 963,309 acres.


Yosemite Falls roared back to life. 

But the drought ain't over yet. 


Sunday, 24 October 2021

Correcting the sugar content




Looks like we messed up. 

Our red must has tested at just over 1.008 on the hydrometer and 5 on the Brix scale. That won't get us to the right alcohol content - too low. We should have added sugar to the must at the first stage but we didn't.

When making wine, the Start Gravity should be 1.070 (normal finished ABV will be 10.5%) to 1.090 (normal finished ABV will be 13%). Finish Gravity should be 0.990 (for dry wines) to 1.005 (for sweet wines).

Alex made a simple sugar syrup dissolving sugar in boiled water. We have to wait for it to cool to room temperature. 

Now we have to figure out how much syrup to add. Because I had to dilute the sugar solution by half to get the hydrometer to read the SG, the specific gravity of the syrup is 1.110 x 2  or 1.220. 

So to increase the SG to where the potential alcohol would be sufficient, we'd have to add 40 oz sugar per gallon or 2.5 lbs per gallon. That would be 1 l of water or 1.5 l of syrup. (Alex did the maths.)

Just as a note to self:  3 kg water plus 3 kg sugar = 1 demijohn.

So we expanded our two demijohns to three with the sugar syrup and must (stirred to keep the yeast equal) divided equally among the three. I tested the SG of the resulting must and it read SG 1.070. That should get us to over 9% ABV. 

Curiously, I just measured the SG of the Solaris must, and it, too, reads 1.008. Not surprising as it started out at the exact same SG as the Rondo must. So we'll have to repeat the procedure for the white. 

So we have 1.5 l of Solaris must, measured by weight. So if we need 40 oz sugar per 3.78 l above, we need:
40/3.78 = x/1.5 = 15.9 or 16 oz of sugar. We added 16 oz of sugar dissolved in 16 oz of water to the 1.5 l of must and essentially doubled the volume. The SG read 1.082, a little higher than the red but perfectly fine. 

Let's hope we have restarted the fermentation. At least we now have 1/3 more wine to bottle. 

Here are 10 more things that can go wrong in fermentation. 

https://www.brewersfriend.com/abv-calculator/ 




Regenerative agriculture in practice

In Sonoma County California, regenerative agriculture has apparently really taken root. But in Oregon, Mimi Casteel of Hope Well Wine is crusading for regenerative agriculture. Whereas sustainable farming means maintaining, regenerative farming is improving the land. It is no-till, no chemical, and natural support with minimal intervention farming, letting the earth restore its natural structure, health and function of the soil. It is regenerating the natural order of the life within. It is restoring our own connection with nature. Human. Nature. Mimi has been on the lecture circuit, doing podcasts, interviews and writing articles where she imparts the wisdom and urgency of letting the earth heal itself. Essentially, when humans stop trying to control nature, it has a chance to fix itself. Mimi is my new hero. 

I am completely taken with this concept. We have been practising Gaia theory and methodology, believing that everything on earth is interconnected. When the connections are disturbed, Gaia becomes unhealthy and begins to break down, until the earth organism takes over and heals itself by eliminating the disturbing factor -- which is us in this case. You cannot fix one aspect at a time. You have to enable the connections to restructure on their own.

Our land has never been tilled. The field in which the vines are growing has a wonderful structure for vines' root systems. A shallow layer of decomposed grasses below which lies clay rich with minerals and stones for drainage. It is sloping and south-facing, with abundant exposure to sea air. I do not believe it has ever had exposure to pesticides or herbicides. We always pulled the docks and ragwort by hand. I do not believe it's ever been fertilised either.

It has had grass and has hosted horses and donkeys for the last 15 years. Before that, it had sheep on the land. All of these (except the stallion) were good for the land, delivering fertilizer and controlling growth naturally. 

The field below the vineyard is above our house where the orchard, vegetable garden, polytunnel and apiary now reside. We have allowed most of that field to rewild and it has returned a rich natural mix of wildflowers, grasses and trees that attract many pollinators. In fact, this year, we've had more bumblebees and butterflies than ever before. When we levelled the land area for the polytunnel, we planted the disturbed ground around the tunnel with native wildflower seeds. Many have taken. I have also spread yellow rattle which is supposed to control the pernicious grasses. I hope it takes. 

We have planted many native trees in that field, including two types of birch and several types of willow, alder, poplar (aspen), ash, oak, beech, sycamore, rowan, hazel, holly and hawthorn. We also have horse chestnut, which is not native but widespread, maple, and sumac. I am going to add a native strawberry tree when it gets big enough. Three Scots pines arrived on their own. And we have loads of native shrubs growing alongside the trees, including gorse, heather, elder, wild rose, bramble, blackthorn, and dogwood. 

We also have a hive with native black honeybees. We don't take more honey than one or two frames per season. We leave the rest for the bees so they can stay healthy and happy and pollinate our fruit and flowers. 

In the orchard, we have several apple trees, two cherries (red and yellow), a crabapple, peach, plum and pear. Below them, we have artichokes, strawberries, gooseberries, red currants, black currants, red raspberries, yellow raspberries, blueberries, blackberries, horseradish, asparagus and rhubarb -- all perennials. We have annual beds below them which usually have broccoli, beans, peas, mange tout, kale, tomatoes, and various other selections which will now be grown in the polytunnel instead. 

Nearer to the house we have non-native ornamental trees such as a magnolia, a black elder, a monkey puzzle and lots of shrubs. We also have lots of bulbs and flowering plants as well as houseplants that live outside all summer. 

All of this contributes massive biodiversity to the site, resulting in happy bees, flutterbys, birds and other insects. We haven't seen bats yet, but we did put up some bat boxes. 

Above the vineyard is another south-facing field that had been taken over by gorse which is now heavily wooded. Gorse by the way leaves behind very rich soil. We have not cut or cleared in this young wood since we removed the gorse. The gorse has come back, but the trees have taken and are now starting to take off. Once the trees are big enough, they will shade the gorse and it will die off.  We've seen fox, pheasant and traces of pine marten but no hedgehogs or squirrels yet. There are no deer in our region. 

The remaining acreage is fields of grass that feeds 9 donkeys through the summer. It is north facing land so it's not great for growing but has hedgerows and we've seen evidence of otters and shorebirds, mainly herons, gulls and curlew. It also has tons of wild orchids. When we dug the land for our foundation, the contractor dumped the soil on the north side of the hill. It took a few years, but the land recovered and the orchids took hold. I love those orchids. 

What is most amazing is that we now have tons of mushrooms popping out of the ground, their fruiting bodies in abundance where before there was nothing but grass or bulldozed land. That means the healthy mycorrhizal structure of the soil is now supporting an abundance of life both below ground and above.I came to appreciate the importance of fungus after reading The Hidden Life of Trees, a wonderful book about how trees are nourished and how they share and communicate.  I love the transformation. I am very proud of what we've accomplished. 

During the early days of the pandemic, we put in a pond fed with rainwater from our roof and aerated with a solar-powered fountain. That created a space for us to retreat and hear the sound of running water. I have planted several aquatic species in the pond and we even had tadpoles this year.

We don't water the vineyard because we want the roots to grow deep. Watering causes them to grow shallow remaining near the surface rather than searching for water and nutrients deep down. That affects terroir and weakens the vines. In periods of heat and drought, we water the veg gardens and some ornamentals. 

We are practising restorative land management without knowing we were doing so. We've never used pesticides or herbicides. We use seaweed for fertiliser and homemade compost to enrich the soil. We coexist with 'weeds' to feed the bees. And we feed our souls with nature. 

Essentially, we are practising regenerative agriculture and restoring the natural order by not interfering with nature. We prune and cut and assist where needed naturally. Indigenous cultures have been doing that for centuries, millennia even. The Maori practice Mātauranga is passed down knowledge that teaches environmental stewardship for the benefit of the culure. I wish we had an indigenous culture to learn from here. Perhaps elder pagans? Western science has a way of presenting facts dispassionately. We need to re-instil the passion for our planet. 

As the demand for natural and organic wines increases, more farmers will switch their methodology to satisfy consumer interests. We'll be right there. 

Before, during the build in 2007

Same field last year

Behind the house before the garden


Behind the house this summer

Honeybee on heather


Wild orchids

Red Admiral Butterfly


A fungus among us













Wildflowers from seed

Great explanation of regenerative agriculture. 
We might even be  able to sell carbon credits

Saturday, 23 October 2021

Visitors to our vineyard


Louis Mostert, a former South African vintner, is visiting his daughter who lives in Ireland and asked to stop by to see what we were doing. He was very encouraged and has put us in touch with a enologist in SA who wants to come to Ireland. 

Louis owned a vineyard and winery in SA but has sold it and retired. He now consults for other vintners. He thought our vines looked very healthy. It's always good to hear from people who know what they are doing that we are not insane. 

The Rondo leaves have just turned a pleasing shade of reddish-orange. All the others are still green. 

Tuesday, 19 October 2021

Adding sugar to control alcohol

Measuring SG with a hydrometer

When must ferments, it is turning sugar into alcohol. Last year, our wine was high in alcohol. This year, I think it will be lower and may need a boost. Less sugar in the fermentation equals less alcohol in the wine. 

Trying to control the alcohol content of your wine is not always necessary. Most recipes are designed to make a wine that is in balance and has an alcohol level that is appropriate to the wine’s traditional style.

Wine recipes often call for specific quantities of sugar. But if you are starting with grapes, adding half the sugar that a wine recipe calls for does not give you half the alcohol in the wine. This is because some of the sugar is coming from the fruit itself.

An easy way to get around this is to use this general rule of thumb when attempting to control the alcohol content of a wine:1 pound of sugar dissolved in 5 gallons of must will raise the potential alcohol content by approximately 1%.

“One pound of sugar added to 5 gallons of must will increase the wine’s potential alcohol by 1%.”

The opposite holds true as well.

Controling the alcohol content of your wine

The biggest problem with this generality is that it does not tell you what your potential alcohol level is  before you make any adjustments. If you are following a wine recipe that calls for a specific amount of sugar, it will only get you in a potential alcohol range, not an exact target. This is because the amount of sugar contributed by the fruit can vary.

The best way to adjust the beginning sugar level in your wine’s must is to use a wine hydrometer. Most gravity hydrometers have a Potential Alcohol scale that will tell you how much alcohol the sugar in your wine can potentially make. Knowing this will allow you to control your finished wine’s alcohol level with more precision.

What's the best alcohol level in the finished wine?

The wrong alcohol content can have consequences. Too little and your wine can spoil, too much and it can taste harsh.

The alcohol level of a wine should be at least 8%. Wine needs alcohol to keep contaminants in check. Over time, wines that have 5%-7% alcohol are more susceptible to spoilage and tend to turn brown.

You also do not want your wine’s potential alcohol to be more than 14%. There's a limit as to how much alcohol a wine yeast can tolerate. Shooting for an alcohol level that is beyond your yeast’s ability to ferment can result in either a stuck fermentation or a wine that is too sweet.

The Alcohol by Volume (ABV) is calculated by subtracting the start gravity from the finish gravity and dividing this figure by 7.362. For example, the starting point for our wine last year was 1.100 and if this fermented down to 0.990, the drop will have been 110 points. This divided by 7.362 is 14.94% ABV. In fact, we ended up with a very high alcohol content but not as high as the calculation. 

Raising the specific gravity (SG)

Raising the specific gravity of wine with sugar syrup is a good way to get the SG up to where you need it when making a wine that just needs a little boost. Knowing how much sugar syrup to add to the wine to get from point A to point B on a hydrometer scale is very useful. To do this you need to know the specific gravity of the sugar syrup. 

You can use a wine hydrometer to determine the specific gravity of the sugar syrup you make. Just put the hydrometer in a sample of the syrup just like you would when testing your wine. If the reading goes off the scale, add an equal amount of water and sugar syrup to a sample large enough to fill the cylinder in which you are doing your readings. Then take a gravity reading and times it by two.

As an example, after you added equal parts of water and sugar syrup, let's say you get a reading of 1.110. That would mean that the sugar syrup’s 'actual' SG is 1.220. You double the 'gravity' part of your reading because you cut the sugar syrup by half. 

Once you know the SG of the sugar syrup, raising the specific gravity of your wine with sugar syrup is just a matter of some calculations. 

Let’s say you want to add 6 ounces of sugar syrup that has a specific gravity of 1.300 to a gallon of wine:

A gallon of wine has 128 fluid ounces. You want to add 6 fluid ounces of sugar syrup for a new total of 134 ounces. Now you need to spread the gravity of (220 times 6) over the 134 ounces. So it is (220 X 6) divided by 134. That equals 9.8507. 

Let's make an equation

(Gravity of Syrup x Ounces of Syrup Per Gallon)/(128 + Ounces of Syrup Added) = Rise in SG

or

(220 x 6)/(128 + 6) = 9.85

There is a very good explanation and useful chart on this page

So if you are raising the specific gravity of a must with a sugar syrup that has a specific gravity reading of 1.220, and you add 6 fluid ounces of that syrup to each gallon of homemade wine, then the specific gravity of that homemade wine would be raised by 9.85 points on the gravity scale. For example, if the wine has a specific gravity of 1.060, the new reading would be 1.06985. You could round it to 1.070.  That yields a potential alcohol figure of 9.2. That's perfect!

I have ordered a book that many call the bible of home winemaking:  First steps in winemaking. It apparently covers this topic very well. 

Hydrometer Chart

Specific Gravity (SG)

Potential Alcohol (PA) % by Volume

Amount of Sugar Per Gallon

1.010

0.9

0 lbs. 2 oz.

1.015

1.6

0 lbs. 4 oz.

1.020

2.3

0 lbs. 7 oz.

1.025

3.0

0 lbs. 9 oz.

1.030

3.7

0 lbs. 12 oz.

1.035

4.4

0 lbs. 15 oz.

1.040

5.1

1 lb. 1 oz.

1.045

5.8

1 lb. 3 oz.

1.050

6.5

1 lb. 5 oz.

1.055

7.2

1 lb. 7 oz.

1.060

7.8

1 lb. 9 oz.

1.065

8.6

1 lb. 11 oz.

1.070

9.2

1 lb. 13 oz.

1.075

9.9

1 lb. 15 oz.

1.080

10.6

2 lbs. 1 oz.

1.085

11.3

2 lbs. 4 oz.

1.090

12.0

2 lbs. 6 oz.

1.095

12.7

2 lbs. 8 oz.

1.100

13.4

2 lbs. 10 oz.

1.105

14.1

2 lbs. 12 oz.

1.110

14.9

2 lbs. 14 oz.

1.115

15.6

3 lbs. 0 oz.

1.120

16.3

3 lbs. 2 oz.

1.125

17.0

3 lbs. 4 oz.

1.130

17.7

3 lbs. 6 oz.