Our long term vision by James Hook

As we grow as a business, DJ's Growers is very conscious of the footprint that is left behind by both us and our clients.

We aim to:

*Increase the uptake of composts, mulches and organic fertilisers (particularly our DJ's Product range) with our clients to improve soil. While sales of products will help with gauging uptake, yield and quality data will be the ultimate guide of success.

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In the early 2000’s, after a visit from Dr. Clifford Ohmart, who had developed California’s first ever third party certified sustainable winegrowing program, the Lodi Rules, the innovative winegrowers of the McLaren Vale were inspired to develop their own version of a sustainability program, which would, ‘improve viticultural practices, fruit quality and the financial viability of the region’. Led by local winegrower and academic, James Hook, many of McLaren Vale winegrowers initiated a series of informal seminars and workshops to help improve viticultural practices. They started a growers bulletin called Crop Watch, that provides, amongst other things, information from nine weather monitoring stations throughout the region, as well as pest and disease alerts. They also wrote a number of grower-endorsed codes of conduct on subjects such as soil and water management, pest and disease controls, and economic benchmarks.

*Support and encourage our clients with reporting their sustainability benchmarks. Increased uptake of programs such as Sustainable Australia Winegrowing amongst our clients, and the achievements made when compared to previous data will show if this is successful.

Recorded on the last day of summer, this vineyard we look at early autumn leaf loss and ripening with Gill Gordon Smith.

How important is post harvest irrigation and fertiliser?

*Continue to champion integrated pest management (IPM). While starting to become more commonplace, IPM is still seen as being difficult to manage and not achievable in many situations. By continuing to train our staff in IPM principles, insect identification, and the effect of insecticides on beneficial species we can make sure that we are advising the use of chemical options in a continually responsible manner. By speaking to grower groups, and spreading the message of IPM amongst agronomy and agricultural retail peers, we can help continue to make IPM more accepted in the general grower community.

*Continue to support local biodiversity and re-vegetation groups. Increasing areas of re-vegetation and decreased problem weeds will be the ultimate measure of success, as will the longevity of these groups that can only exist with support from local volunteers and business support.

The first Homeless Grapes Project started in 2015 with one little Facebook post. Jock Harvey, from Chalk Hill Wines, posted that he had a surplus block of grapes and anyone was welcome to them if they made a donation to charity.

*Continue to support the Homeless Grapes Project which donates grapes, grape picking and winemaking to raise money for the Hutt Street Centre.



2019 McLaren Vale Wine Vintage Report by James Hook

The McLaren Vale wine region relied on its advantage, natural and constructed, to have a successful vintage for 2019. Specifically, proximity to the moderating temperature influence of the Gulf St Vincent, reliable spring rainfall, and access to multiple irrigation sources and helped vineyards cope with a challenging dry and hot season.

The growing season rainfall from October to the end of March was 142mm, compared to the average of 172mm, the deficit in rain occurring during summer. The dry conditions posed significant challenges for local grape growers. A lack of summer rain meant the irrigation was important to make up for the shortfall. Using timely irrigation, firstly to develop a canopy large enough to sustain vineyard crops, then maintain the health of vines until harvest was vital.

Disease pressure (governed by rainfall, humidity and temperature) was very low for this vintage compared to the 2017 Vintage, our last season with above average rainfall, and other seasons with serious issues (1993 – downy mildew, 2011 - botrytis).  

There were two specific extreme weather events that did significantly alter vineyard development and ripening. Firstly, there was an intense hail storm in late November. The storm saw high speed winds buffet vines and hail fell leaving scars on some fruit. Then in late January we experienced our hottest daytime temperature since January 2009, 45oC, plus several days in late February where the temperatures were about 38oC.

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What was fruit like at harvest? Good, but there wasn’t as much of it as we’d like. At harvest vineyards in the McLaren Vale wine region generally had lower yields of fruit with more intense flavour. Vines had more open bunches, which weighed less than average.

The collective "we", the McLaren Vale grape and wine community, live and breathe our “big three” red varieties (Shiraz, Grenache and Cabernet Sauvignon). Shiraz accounts for approximately 60% of our harvested tonnage. Cabernet Sauvignon is 19% and Grenache is 5%. Shiraz yields were significantly down, while Cabernet Sauvignon and Grenache held better. For the second season in a row, our late season varieties (Mourvèdre, Montepulicano and Nero d’Avalo) held well until they were picked in late March.

Grape picking took just over 4 weeks to complete starting at full pace in the first week of March and ending at the end of the month. The report from winemakers on wine quality has been good, and winemaking was made easier by lower tonnages allowing for close attention the winery. Winemakers could use extended ferments if they required as there was little pressure to turn fruit into wineries compared to bumper years.

The combination of hail in November, a dry summer and hot weather in January and February is expected to reduce the overall size of our harvest compared to recent years. Crop yields expected to be 25% down on Vintage 2018, which in turn was 20% down on Vintage 2017 which was our last bumper crop.

National sustainability programme announced by James Hook

A single national sustainability program, Sustainable Winegrowing Australia, was announced today. Sustainable Winegrowing Australia will formally commence on 1 July 2019. This announcement expands our locally developed SAW system and joins it with ENTWINE to form a national one.

2012 SAW release at the McLaren Vale Bocce Club.

2012 SAW release at the McLaren Vale Bocce Club.

The Wine Idealists 2015 article gives an overview of McLaren Vale’s role in pushing for a national sustainability programme: https://thewineidealist.com/2015/03/27/total-sustainability-saw-mclaren-vale/

Sustainable Winegrowing Australia will be managed day to day by the AWRI, overseen by a steering committee comprising representatives of Australian Grape & Wine, Wine Australia and the AWRI, and advised by an industry advisory group made up of program users, regional representatives and other key stakeholders.

DJ’s founders Derek and James welcome the new programme and look forward to helping growers nationally improve their vineyards.

Dry conditions in Autumn likely to affect the 2020 grape vintage by James Hook

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What does a dry post harvest mean for grapevines?

Continued photosynthesis and nutrient uptake during the post-harvest period allow vines to store carbohydrate and nutrient reserves for use in the next season.

Recommended practice is to apply irrigation at the end of the season to avoid entering vine dormancy with a dry soil profile.

What if dry conditions continue into winter?

Recommended practice is to bring the main part of the rootzone back into the readily available water range in late winter, or several weeks before bud-break, may

also suffice and will also assist in leaching applied salts from the rootzone. Vines that reach bud-break with a dry soil profile can have uneven and reduced shoot growth, possibly as a result of a decline in root function.

Also dry soils through bud-break appear to have a greater effect on canopy growth than yield.

Want to know more?

Virus Testing Results by James Hook

DJ's have just completed a round of virus testing for one of our clients investigating poor vineyard performance.

Taking a virus test before top-working is a recommended procedure because of the effects viruses can have on the grafting process.

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At the date of virus sampling the vineyards tested positive to:

LR4-9: Leaf Roll associated Virus types.

GVA: Grapevine Vitivirus A

This virus has been associated with Kober Stem Grooving and Corky Bark diseases. These diseases are responsible for graft incompatibility, delayed budburst, severe decline, and even death of vines. GVA is generally transmitted by grafting; not transmitted by contact between plants. GVA is commonly seen with pits and grooves around the grafting union.

Unfortunately as this vineyard has tested positive to GVA virus and is considered not suitable for top working. 

Please follow this link to the Virus Atlas for more pictures and grapevine virus information - http://ucanr.org/sites/intvit/files/24513.pdf

Did you know... Virus can spread from the roots of old vines? by Brett Desmond

Did you know it’s possible to transfer vine viruses to new vines when grafting or even when replanting your Vineyard?

Joe Siebert investigates…

In some cases you will see some obvious signs (like in this video) but in others, viruses won’t show symptoms prior to doing this work - so it’s essential to virus test during your planning stages. Speak to us for more information.

A field left fallow that has some vines that have survived from root fragments.

A field left fallow that has some vines that have survived from root fragments.