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Downes Wholesale Nursery - July Newsletter



 

 

 

 

Getting it right from the ground up Part II

This article 2 in a series of articles as featured in Australian Horticulture Magazine by, Warren Downes deals with what it takes to set up a development of this scale and the advancements in practices and technology involved. Downes Wholesale Nursery are undertaking a massive development of a 145 acre property at Theresa Park in Sydney’s west, developing it into one of the largest wholesale nurseries on the east coast of Australia.


As I write this our 18 mega litre dam is well on its way to being filled by rain, and will be full in under 24 hours, thanks to careful planing at the earthworks stage. Our huge swale and sculpturing of the earth have created a catchment area of over 30 acres which will be expanded to almost double that with the addition of some pipe work. The property was reshaped so we could use gravity to control the flow of water through a series of drains and wetlands before reaching the dam.

Construction of plant bed pads will begin shortly where our water recycling program will be further improved. Each plant pad will be formed into a shallow dish and lined with plastic to stop water penetrating into the ground. The dish will be lined with ag pipe that will guide the water to a drain system, that leads to our wetlands for recycling and purification. Over the plastic and Ag pipe 100mm of crushed aggregate will be laid as a base for the pots to sit on. This reduces the risk of disease and provides excellent drainage.


Shows water waste with mist rising and dissipating into air.

We have selected the Rain Bird LF1200 impact sprinkler for the majority of our overhead irrigation. This sprinkler is a low flow head and has a good size droplet with no misting. Next time you see irrigation running, watch it closely and if you see a fine mist rising up above the sprinkler you are wasting water and increasing the humidity.

Being a low flow sprinkler the LF1200 does have much longer run times than other impact sprinklers to achieve the same application rate.Run times will be up to 1 hour in summer, compared to around 20 minutes using other overheads sprinklers.

This gives the advantage of better penetration and uniformity. You only have to tip a bucket of water over a lawn to see how a fast application will run off rather than penetrate the soil.

Rain Birds LF1200 sprinkler, showing no misting and water waste.

The LF1200 is also useful for frost protection as it’s low application rate can be utilised to continually irrigate over long periods without wasting water. With Rain Birds SiteControl irrigation controller it can be programmed, so if frost protection does runs, it will cut it out of actual irrigation time, so that no water is wasted.

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Tel: (02) 9606 5044 | Fax: (02) 9606 5234 | ABN: 3700 232 4156

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