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Wood size for tabletop SFG

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Wood size for tabletop SFG

Post  arla on Mon 07 Jan 2013, 1:51 am

Based on reading, seems like 2x8 vs 2x6 would be the appropriate sized wood for use for a tabletop SFG.

Can anyone confirm?

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Re: Wood size for tabletop SFG

Post  sfg4uKim on Mon 07 Jan 2013, 4:00 am

It seems to me that bed depth, whether on the ground or on legs, is a matter of personal preference.

For instance I have a "salad table" bed on legs that uses 2x4s and the bottom is made from aluminum screening. According to the U of MD, the following are shallow-rooted veggies that can grow in just 4" of Mel's Mix:

Broccoli family-arugula, kale, mustard greens, radish, cress, broccoli raab, mizuna, kyona, komatsuna

Beet family- spinach, chard, orach, beets

Lettuce family- lettuces, endive, escarole, chicory (Note: ‘Deer Tongue’, ‘Red Sails’, ‘Bronze Arrow’, ‘Jericho’, and oak leaf types are more heat tolerant)

Parsley family- chervil, parsley, cilantro

Mint family- basil, thyme, anise hyssop

Other crops- leafy amaranth (callaloo), sorrel, purslane, claytonia
(miner’s lettuce), corn salad (mache)

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Re: Wood size for tabletop SFG

Post  bnoles on Mon 07 Jan 2013, 4:38 am

I used 2X8 for no particular reason, but I did fill the bottom 2 inches with sand to save a little $ on the MM. This gives me the recommended 6 inches growing depth.

Good info posted by Kim above on 4" requirement plants.

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Re: Wood size for tabletop SFG

Post  boog1 on Mon 07 Jan 2013, 9:55 am

I'd have ta go along with Kim if you want longevity the thicker stuff would probably last longer. In my case the two I built were made from a 2'X4'X6' wood crate I got from work I had wood screws and 2X4's so the only money I had spend was for a set of saw horse brackets, like 12$ an some change. This spring instead of sawhorses I was planning on installing permanent legs.

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Re: Wood size for tabletop SFG

Post  bakermtb on Mon 07 Jan 2013, 11:21 am

I agree with all. One suggestion if your legs are 3' or more in height you may need some additional support for the legs. This will depend on the size and weight of the bed you build.
I used some marine grade plywood (already had) for one bottom and wire on another bottom like Kim used.
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Re: Wood size for tabletop SFG

Post  arla on Sun 13 Jan 2013, 10:40 pm

Thanks for all the advice, I'm starting with a couple of trial boxes, 2x3 in size, one is 6" deep, the other 8" deep.

So far looking good, but I need to put in the hardware cloth, figure out whether I'm putting in a brace or not, perhaps I'll try without, and see what happens for a year or so, for a 2x3 box not sure how much it's needed.

Going to start with just basic breeze blocks for legs, see what happens from there.

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Re: Wood size for tabletop SFG

Post  camprn on Mon 14 Jan 2013, 6:44 am

Just my $0.02, if you don't put a brace or a strap under the hardware cloth, you do indeed run the risk of it collapsing. Good luck and post some photos when you get set up. Very Happy

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