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Thread: Raised Garden Beds
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21st October 2005, 01:50 PM #1
Raised Garden Beds
I'm looking at putting in some raised garden beds and after timber to do the job.
I'm inclined to use the redgum "sleepers" you see in most garden places and Bunnings. Looking for the best value. Again looking for help finding a good supplier at a reasonable cost in Melbournes West.
Would prefer real Sleepers but they appear overpriced.
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21st October 2005, 01:58 PM #2
Whatever sleepers you use, they can be expensive.
I would be wary of the red gum sleepers given that they will rot with time and will also attract termites. At least use steel for your posts.
Have you considered blocks? Or maybe treated pine, which - and this is the case with the red gum will also distort out of shape over time, particularly if they are only a small bed with no real pressure on them.
You could treat the redgum ones with creosote or sump oil (but I didnt tell you that)
CheersThere was a young boy called Wyatt
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21st October 2005, 02:13 PM #3
How many do you need Benny, this greatly affects price (up to 50% off)
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21st October 2005, 03:08 PM #4
Am having a bit of a rethink as I was heading down this path but might try a more lasting bed construction.
This is my Sister's Sister in laws..........
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21st October 2005, 04:09 PM #5
Holy chokoes! Thats a serious vegie garden
Cheers,
Adam
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I can cure you of your Sinistrophobia
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21st October 2005, 04:27 PM #6
Yep mine will only be about 1/3 that size.
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21st October 2005, 05:38 PM #7
Go for the treated pine. Easy on tools and lasts just as long as treated h/wood.
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21st October 2005, 07:48 PM #8
Treated pine is ok for flowers but I wouldn't use it for veggies in case the veggies suck up the arsenic which is an accumulative poison.
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21st October 2005, 08:04 PM #9
So I take it you don't drink wine, the grapes of which are mainly grown on wires supported by treated pine Must be laced in arsenic... (albeit insoluble pentavalent arsenic which is not readiy accepted to be carcinogenic and, if it leaches at all as a result of insuffiecient chromium to fix it in the treatment preocess, leaches at a rate that generally sees the levels in soil only micrograms higher than background levels - you'd die sooner from eating almonds, smoking, drinking or living a high stress life with no time to get out and grow vegies).
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21st October 2005, 09:27 PM #10Originally Posted by bennylaird
All my beds are raised and I used concrete borders , only 75mm wide but about 350mm high . Its really quite simple and lasts forever . The advantages are less bending into a raised bed and concrete holds the heat so your soil temperature , more important than air temperature , stays high . It is a great heat bank . I used plywood formwork and pieces of electrical conduit to hold it apart , then holes drilled in the ply to line up with the conduit and coach bolts through that to prevent it spreading when poring in the concrete . F52 mesh is more than enough . The form work was then moved along after 1 or 2 days . The same tecnique I used to build some of my farrowing pens . 6:1 concrete mix is ample .
Worked for me .
Regards
Rickuhm , where am I ?
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21st October 2005, 11:05 PM #11
H4 treated pine, will outlast the garden. 1000's of wineries can't be wrong hey Eastie!
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24th October 2005, 06:26 AM #12Member
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Raised garden beds
Originally Posted by bennylaird
Cheers
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24th October 2005, 10:56 PM #13
From what I remember the cane rail lines use the same sleepers as normal tracks. In Melbourne they sell "garden sleepers" that are 200mm x 50mm, a lot smaller than the rail ones.
As for chemicals leaching - you are probably right, so raw timber should be good, or at least the piece of mind will be good
If the $ are a bit much now to do the whole lot, leave the uprights that you will use to bolt the sleepers to at the envisioned height. Each year you can add a row of sleepers. The uprights can be the same sleepers as you use for the surrounds.
I did my veggie garden over winter, and I'm still going out every day to check on my potatoes and all the rest. Feels good for an ex-Qld ex-country boy.
I still like Rick's idea of cast concrete though, seems a smart choice if you have a concrete mixer.
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24th October 2005, 11:11 PM #14
Thanks Clinton for your vote but really you dont even need a concrete mixer , it is really small amounts of concrete involved and a wheelbarrow is easily big enough , just 3 or 4 barrows will go a long way , maybe as much as a 6m stretch . It is only 75mm x 350mm .
And it is cheap . 0.026 cubic meters to the lineal meter . It is nothing . For the garden bed I had a 150mm wide by 75mm deep footing .
Regards
Rick
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25th October 2005, 12:43 AM #15
I would have to disagree with the comments about leaching as the chromium ion acts as a mordant between the arsenic and the cellulose structure of the timber. So therefore the arsenic is chemically bonded and will not leach into the surrounding soil. As for raw timber sleepers, how long do you expect them to last in the ground with excessive moisture from constant watering of the vegies.
I think we should be more concerned about genetically modified foods!
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