Sunday, 27 December 2020

Bottling the wine


As we really didn't have much yield, we didn't expect much in the results. But we are pleasantly surprised by our Rondo 2020. The specific gravity reached 0.99 and Alex has bottled the wine despite not having achieved good clarity. He's filtered it a second time, a slow process but manageable with 4 bottles of end products.  

Our start SG was 1.10 and our finish is 0.99 so our finish alcohol content is 14.9%.  A bit on the strong side, but the taste and colour are very acceptable. Now we wait six months and taste again. Right now it has a fruity and slightly tart mouthfeel. But it's not unpleasant. 

"Wine is sunlight, held together by water." - Galileo Galilei

I suppose we are now among the crazy Irish trying to make wine in the west of Ireland.  





Monday, 21 December 2020

Soil nutrients

I found a website with recommendations for fertilization of vineyards. Their recommendation regards growing conditions in various countries, including Italy, Spain, South Africa and India, which I imagine would apply to us as well. 

  • Plant population: 2,000-10,000 vines/Ha.
  • Soil type: light to medium.
  • Expected yield: 15-30 T/Ha.

Soil level

Suggested correction method

Low P

10-25 ppm

Band 1250-600 (resp.) Kg/Ha superphosphate
Medium P

25-40 ppm

Band 600-350 (resp.) Kg/Ha superphosphate
High P

40 ppm and above

Band 350-200 (resp.) Kg/Ha superphosphate
Low K

<200 ppm

360 Kg/Ha SOP
High K

>200 ppm

No correction required
Our soil analysis showed very low concentrations of both Potassium (K) and Phosphorus (P).  The analysis also confirmed the pH readings we got using our gauge. 

That may explain our low yield in year one. As we have now placed seaweed at the base of the first ten plants, I am hopeful that we can correct that over the course of the winter. I'd like to maintain an organic approach to the management of the vines. 

Happy winter solstice!

Sunday, 20 December 2020

Soil Analysis

A soil pH in the range of 5.5 to 6.5 is considered optimum for grapes and generally has a better nutrient balance for plant growth than soils that are more acidic or alkaline. Vines will grow from pH 4.0 to 8.5, but a pH below 5.5 and above 8 will depress yields and create problems for the vines. The ideal soil pH depends on the type of grapevine. French American (hybrid) grapevines that are grown for wine prefer a 6.0 soil pH; Vinifera grapevines grown for wine and direct consumption prefer a pH of 6.5. The amount of material needed to adjust the soil pH will depend on the soil texture (the amount of sand, silt and clay in the soil) and the type of grapevine. Our pH readings were good. Consistently reading just under 6.0. The official analysis showed 6.5. That's a good start. 



Alex sent soil samples off for analysis and, as expected, we have silty clay soil. The composition is:


It's not the best but it ain't bad according to several sources consulted. In fact, it's great that there's no indication of loam as loam is too rich for grapevines. They like poor soil best. We've got that in spades. 

We also had Phosphorus (P) and Potassium (K) results reported; they were in the very low index. When I find out what that means for grapevines, I will share it here. 




Tuesday, 8 December 2020

Winter has arrived



It snowed on Croagh Patrick and Nephin so the higher elevations were white a couple of days ago. Then it rained - a lot. Then came the cold. Two nights of heavy frost, the first with heavy fog. But two days of freezing overnight temps are good for the vineyard. All the leaves are down. I was shocked to see some grapes still edible and some flower buds still trying to open. 

It's been a strange autumn. Lots of stuff blooming when it shouldn't. Lots of wind. Lots of rain. Dramatic.

Alex has written his grant submission and submitted it to Teagasc for review. They are favourably disposed and made a few good suggestions. We are planning to add a shed for equipment storage and for wine production. Next will be an application for winemaking approval. 








Monday, 30 November 2020

Bottling the wine



Wine is aged to give it more taste and general mouthfeel as well as colour and other properties. Rushing the winemaking process is widely considered a waste of good wine among homebrewers of wine and is highly frowned upon.

Here is a little cheat sheet I found to predict how different ageing times affect the wine in the bottle.

Wine AgingProperties
1 monthThe definite minimum time it takes before you can even taste your wine, anything shorter results in bad tasting wine
3 monthsWine has matured more and gained increasing flavours and distinctions
6 monthsThe typical time for ageing wine, both red and white. Here your wine has a great taste and doesn't really need any longer maturing
10+ monthsMatures the flavour of your wine even further. Can create more bitter, unique flavours. The longer you age, the more unique

Sunday, 29 November 2020

Ireland not suitable for growing grapes - bah humbug!

Vineyard in Galicia, Spain
Photo (c) Alex Blackwell


I just stumbled across this article from 2016 in the AcademicWino titled. The Feasibility of Ireland Becoming a Wine Producing Country Due To Climate Change. The author concludes that it is unlikely yet doesn't even research the fact that Ireland already had two vineyards producing wines at the time. So bloody not believable. He thinks everything is wrong: wrong soil, wrong GDD, wrong temperature, wrong rainfall, no talent. Bah humbug. Come see our vines thriving and grapes ripening. Then speak. 

In fact, 17 years ago David Llewelyn started making wines in Ireland as a hobby. Now its a proper business and his Lusca wine sells for €65 a bottle. It's a novelty featured in the prestigious Celtic Whiskey shop in Dublin. We already have orders from our local wine bars who would love to feature a local wine. We laughed and said we'd come back in a few years. 

We are still waiting for our first wine to clarify before bottling but it's soon time to put this year's vintage to rest for a while. More later. 




Sunday, 1 November 2020

Abysmal Autumn weather

a few leaves still hanging on

The past week has been abysmal weatherwise. We had Hurricane Epsilon on Thursday, Storm Aidan on Saturday, an unnamed low today and another tomorrow. We've had torrential rain, thunder and lightning -- something I've never experienced in Ireland, hail, sleet and wind, lots of wind. The buy off the coast here, M6, recorded a 30-metre (90f)t wave and the surfers were out having a blast. 

We had 227.9 mm rain in October, that's 67 mm more than last year in the same period. All the other variables were pretty average for the month. 

We've picked the apples but waited to pick the remaining pears which were beautiful this year, but they were all gone. Alex thinks the crows stole them. I just don't know. The berries are almost done now, just a few raspberries and strawberries left, mostly rotting in the wet weather or getting freeze-dried by the wind. 

The wine is clarifying. We will soon bottle the two or three bottles and wait for the requisite time period to sample. With our second lockdown underway and unable to travel more than 5 km from home, we're keeping ourselves busy. 

What a year! The American elections are tomorrow, and we voted long ago by email and mail ballot as we are both dual citizens. We can always be hopeful. 

We've been picking the remaining grapes to eat...very tasty

 
Pinot noir on the left
Albarino on the right


Three-year-old vines up the hill


The calm between the storms

So beautiful, but no blue moon

Peachy sunset

Wednesday, 7 October 2020

Earth is heating up

 

From Statista Infographics

NASA is monitoring all kinds of climate statistics. The latest data on temperature show that August of this year was 2.14C degrees higher than a selected average of measurements from the 1880s until now. Small wonder that California is burning. The epic scale of the wildfires is growing with the increase in temperature and this year reached a shocking new milestone -- one of the fires, The August Complex, on the border between San Francisco and Oregon has burned more than 1 million acres. The total acres burned this year so far is double any previous figure, at a staggering 4 million acres burnt. 

New York Times

New York Times



Friday, 2 October 2020

The second stage


We racked the wine into the demijohn and corked it with the oyster farm cork with fermentation airlock. It smelled very good and Alex said he tasted it yesterday and it was good. But the specific gravity was 1.02 so we have a little ways to go to get to 0.99. It might be just a little cool in the pantry area. It will remain there for about two weeks before stabilizing. 

There is not much more to this stage so we'll just wait and hope it continues to ferment a little more. Meanwhile, the remaining grapes, those that were way behind ripening, are not ready to pick and eat. 



Making the wine

Lovely morning but heavy rain due all afternoon

I've been reading up about how to make wine at home. Unfortunately, none of the descriptions covers our situation so we have had to punt. We mashed the grapes by hand and with a sterilized wooden meat tenderizer. That worked reasonably well. For ten days, the grapes have fermented. Alex stirred daily and the bubbling going through the fermentation airlock was at times scary and loud but very satisfying. 

I bought yeast and Campden tablets. But how to extract the liquid from the vat after the first fermentation? Alex decided my muslin bag for making apple jelly was just the thing. Well in no book have I seen this, but it's worth a try. We found a nice demijohn at Ross House and cleaned it up. It looked like it hadn't been used in 30 years. Full of dead bugs and spiders. But it cleaned up beautifully and I sterilized it with the stuff that came with the winemaking kit. 

Alex found some predrilled stoppers from his old oyster growing days and they happened to fit the demijohn and the airlocks perfectly. Stage 2 would be completed without additional expenditure. And as the final steps of stabilising the wine won't be necessary -- we're going to have maybe 2 bottles if we're lucky -- we should be bottling on about a week. I'll report the specific gravity in the next post after we've measured it. 




BTW, YouTube has loads of useful how-to videos:  https://youtu.be/n7tauROWh0Y  

Thursday, 1 October 2020

California is burning again


Horrible fires in California have killed people and destroyed structures. At least 19 wineries have been destroyed or damaged by the Glass fire. As the fire made its way across wine country, about 70,000 people were evacuated. Vintners who’d fled the blaze returned to the area to discover in many cases that their life’s work had been destroyed. Here’s the latest on the winery and restaurant burning, businesses damaged or lost in the fire.

In some cases, the vines were charred but the buildings stood. In other cases, the buildings were destroyed with minimal damage to the vineyards. So unpredictable, yet so deja vu. People are leaving California never to return, after several years of repeated hell. Oregon and Washington states are ablaze as well, all this while America's cities are being destroyed by angry mobs. 

Bob and Jody Lipkin, owners of Lattitudes & Attitudes sailing magazine, for which we write often, lost everything. They left with their two cats and one van, leaving everything else behind as they evacuated with the fire cresting the hills around their home. Fortunately, they were insured. 



 #GlassFire: 51,266 acres, 2% contained.

#ZoggFire: 55,046 acres, 9% contained. #CreekFire: 307,051 acres, 44% contained. #BearFire/#NorthComplex: 314,949 acres, 79% contained. (#NorthComplexWestZone: 84,595 acres, 95% contained.) #BobcatFire: 114,438 acres, 63% contained.

Tuesday, 22 September 2020

So what's next in making our wine

Hydrometer suspended in grape juice

The wine must has to ferment for about 2 weeks in the first stage. When fermentation stops, you have to test the specific gravity. 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). 

I've seen many recommend that wine should be fermented down to dryness. If you like a sweeter wine, you can then add sugar or grape juice at the end to reach your preferred sweetness. It is a dangerous business stopping the fermentation early. 

So the hydrometer is probably the most essential piece of equipment to make wine with success. I've ordered a spare as I can imagine that it's pretty easy to break. I've also read about how to read the hydrometer properly. You have to make sure your hydrometer is floating freely and not stuck against the cylinder. You read at the bottom of the meniscus not the top (I remember that from chem class). It measures the Specific Gravity (SG) of the liquid being fermented. This will then in turn give you a guide to the Alcohol by Volume (ABV) you will be able to produce. The hydrometer is used throughout the fermentation to ensure sugar is being converted into alcohol. As more sugar is converted to alcohol, the SG will fall.

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 is 1.100 and if this ferments down to 0.990, the drop will be 110 points. This divided by 7.362 is 14.94% ABV. That should kick a punch. 

You have to make certain the fermentation is complete and stopped at the right time. Sometimes fermentation slows down or stops too early. A stuck fermentation is one that falls short of reaching the expected final gravity, and as with many things brewing, the term is relative. A wine that stops at 1.000 probably suffers more from poor instrument calibration than it does from stuck yeast. A 1.100 wine that stops at 1.045, though, still has a way to go and needs some help.

There are tricks that one can use to restart the fermentation process. One is temperature. If the hydrometer is placed in water at 20°C, it will read 1.000.  Most people only use the hydrometer as a guide but if you want to be really accurate then this should be done with a liquid temperature of 20°C. If the liquid is 5°C higher then add 0.001 and similarly if its 5°C lower then delete 0.001.

Warming up the must is probably the most reliable way to restart a stalled fermentation. Some yeast strains are more temperature-sensitive than others and may require some warmth to complete the job. Some strain are famous for refusing to budge until they are warmed as high as 95°F (35°C). Some British yeasts are stubbornly flocculent; it’s worth giving the must a good swirl a couple of times a day just to keep the yeast cells in suspension until they’re done.


Monday, 21 September 2020

Harvest time and making wine

 

Alex holding a small bunch

Hey, great news. We had our first grape harvest after 5 years of waiting on Saturday, September 19th. This is what it looked like. The bags seemed to work. We had a sort of double-blind comparison.  We bagged many but left some. The bagged ones were much nicer than the unbagged ones which seemed to have been largely picked by the birds again. Some of the ones that hadn't been eaten, looked like raisins. But we got a yield of three buckets from the 5 vines.

About 3 buckets worth from 5 Rondo vines

I think we really did not expect a harvest as we hadn't read up on how to use the equipment I had bought last year. Our starter kit contained 2 monstrously large plastic vats (when compared to the volume of grapes), some sterilizer, a stirring paddle, some tubing, a sampling pipette, yeast packet, bottle washer, and hydrometer and graduated glass test cylinder. It did not contain Campden tablets. Campden Tablets are sodium metabisulphate, which prevents oxidation and bacterial infection when bottling wine or cider. It provides long term stability to the brew. So we are going without them for the first phase. 

Sulfites comprise a range of sulfur compounds -- particularly sulfur dioxide (SO2) -- that are a natural by-product of the fermentation process. They work as a preservative against certain yeast and bacteria which will quickly destroy a wine if they start to multiply. But fermentation alone doesn’t produce enough sulfite to preserve a wine for more than a few weeks or months in the bottle, so winemakers add extra in order to keep microbes at bay. A well-made dry red wine typically has about 50 mg/l of sulfites. Wines with lower acidity need more sulfites than higher acidity wines. At pH 3.6 and above, wines are much less stable, and sulfites are necessary for shelf-life. 

I sterilised all the equipment per instructions I found online, and I washed the grapes and discarded any that were unsuitable. A few were mouldy, so I picked them off and washed the rest. I hope that's what one does. Alex picked the grapes off the stems and put them in the sterilized vat.

I had bought a book for beginner winemakers and at least we found a recipe and instructions. We crushed the grapes partly by hand, and then I used the flat end of my wooden meat mallet, sterilized, of course, to complete the press. We were going to use the apple press but were advised against that by the book. 

The specific gravity was 0.9 and the goal was 1.09, so we estimated the amount of sugar water required and got to 1.1 on the first try. We were pleased with that. I placed the lid on with the airlock engaged.  It's good to have the first try of winemaking on a small batch. 

I ordered Campden tablets for the next phase so hopefully, we will be okay if whatever contaminant doesn't destroy the must. Plenty of people don't use Campden tablets if they are producing wine with naturally occurring resident yeast. I've also now ordered a 5L demijohn for the next stage and a second of everything that could be easily broken per the advice of another knowledgeable blogger. So now we stir and wait. 

Perfect little packages and very sweet

Some were picked clean

A few weren't quite ripe

Some even unbagged were lovely



Saturday, 5 September 2020

Rondo harvest time


Alex bought mesh bags to put over the grape clusters and has been tying them on. This is to protect the grapes from the birds as the grapes ripen. Seems like a lot of work to me, but worth it if we get our first harvest. 

The weather has been pretty miserable. Chilly, wet and windy. In the first four days of September, Newport Furnace had 51.8mm rain. That's about a third of the monthly average. I hope that doesn't affect the harvest. To pass the time during heavy rain showers, Alex sent me a video to watch.  It's pretty badly done but at least it shows that the Rondo grapes grown in the UK do not get much bigger than those we have in our first harvest. 

The next thing I am going to learn about is the relationship between fungi below the surface and vines on the surface. A study has shown that trees of distinct genotypes develop relationships with specific fungi that help them survive adverse weather conditions. They form symbiotic relationships which makes so much sense to me and is a great reason not to continually disturb the soil. This study led me to others about vines. 

A study from 2018 shows that "Arbuscular mycorrhizal (AM) fungi associate naturally with grapevines in a symbiosis whose importance for vineyard performance is becoming increasingly clear. Decades of research attest to the role of AM fungi in increasing nutrient supply for host plants and in providing protection from soil-borne pathogens."  This I have to study in much greater detail. 




Wednesday, 2 September 2020

August is gone




August ended with less rainfall than in the previous 3 years, but equal to the mean of 1981-2010. (Why they chose two earlier decades, I do not know.) August also saw the onset of veraison, or the beginning of the grapes turning colour. 

Meanwhile, September started with torrential downpours and flooding in Clifden, which is a short distance away in Connemara. We didn't have quite as much, but we still had a lot overnight and all day. Met Eireann had forecast 25-35mm rain for our area. And more to come. The air and soil temperature were almost a full degree higher than prior years. It certainly feels like climate change. 

Did I mention that we now have native honey bees?  Grapes don't need them as they self-pollinate, but the orchard should benefit enormously. Plus, I won't have to walk around with a paintbrush doing the pollinating myself. The suit can double as protection against coronavirus transmission. Just suit up and everyone will steer clear on the streets. 

MONTHLY VALUES FOR NEWPORT UP TO 01-SEP-2020

Total rainfall in millimetres for NEWPORT

YearJanFebMarAprMayJunJulAugSepOctNovDecAnnual
2020139.5342.8178.225.554.7164.5187.9137.93.51234.5
2019146.8115.0228.5100.7112.576.682.7228.9175.5160.7148.1220.61796.6
2018274.6155.686.294.370.465.958.6179.1148.3140.9172.6201.01647.5
201794.3151.0216.231.164.2108.3164.0197.6153.3190.1203.0179.71752.8
mean166.7126.5141.296.894.789.7100.9132.5131.5176.0170.4180.21607.1

Mean temperature in degrees Celsius for NEWPORT

YearJanFebMarAprMayJunJulAugSepOctNovDecAnnual
20207.26.06.611.012.813.814.416.016.611.0
20196.98.47.910.211.713.116.315.513.710.37.17.110.7
20185.94.65.59.113.116.116.115.012.410.98.38.110.5
20177.16.78.710.013.514.014.814.613.011.78.16.610.8
mean6.16.17.39.011.513.815.415.413.510.88.36.510.3

Mean 10cm soil temperature for NEWPORT at 0900 UTC

YearJanFebMarAprMayJunJulAugSepOctNovDecAnnual
20205.74.75.49.713.014.814.916.3n/a10.6
20196.16.16.88.912.213.816.715.713.59.46.25.610.1
20184.42.94.08.213.117.418.415.112.19.66.66.69.9
20175.55.66.99.613.714.915.815.212.711.17.35.310.3
meann/an/an/an/an/an/an/an/an/an/an/an/an/a

Global Solar Radiation in Joules/cm2 for NEWPORT

YearJanFebMarAprMayJunJulAugSepOctNovDecAnnual
20206263108082454546192584764353740215405551429272020
2019537810595213063764849884496074539537116264601740681674766313728
2018597613390252693470958446598495144834923226191712378424068335662
201769689849262183076461302410464447237677268331374171924601310663
meann/an/an/an/an/an/an/an/an/an/an/an/an/a

Potential Evapotranspiration (mm) for NEWPORT

YearJanFebMarAprMayJunJulAugSepOctNovDecAnnual
202017.621.935.070.291.672.966.266.42.2444.0
201913.421.535.460.479.078.279.562.942.829.214.814.3531.4
201816.321.835.752.088.2102.487.258.737.930.218.011.5559.9
201715.618.139.552.495.868.272.160.643.726.116.512.6521.2
meann/an/an/an/an/an/an/an/an/an/an/an/an/a

Evaporation (mm) for NEWPORT

YearJanFebMarAprMayJunJulAugSepOctNovDecAnnual
202022.431.951.898.9130.8104.894.392.73.2630.8
201917.729.552.087.3111.6112.8109.688.859.939.618.917.9745.6
201821.930.251.776.4127.4140.4120.782.253.140.622.814.9782.3
201720.725.956.273.6136.299.6102.485.762.235.921.016.1735.5
meann/an/an/an/an/an/an/an/an/an/an/an/an/a

DEGREE DAYS BELOW 15.5 DEGREE CELSIUS FOR NEWPORT

YearJanFebMarAprMayJunJulAugSepOctNovDecTotal
2020257276275143111735531N/AN/AN/AN/AN/A
2019266200235165130892736671642512621892
20182983063091941045031441001472152302027
201726024721216689604949861182222771834

Notes on the Data

Evaporation and PE data are calculated using Penman/Monteith formulae.
All means are for the period 1981-2010. Data updated daily at Mid-day.