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On patio - is a bottom needed?

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On patio - is a bottom needed?

Post  Janas on 2/3/2013, 4:12 pm

Hi. I'll be building my first SFG this spring and it will go on my concrete patio. Is a bottom needed? It seems that weed cloth would be unnecessary. Ditto for vole barrier and plywood. Would a bottom layer of cardboard be useful to help retain water?

Thoughts and experiences?

Thanks!
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Re: On patio - is a bottom needed?

Post  quiltbea on 2/3/2013, 4:20 pm

You don't want to retain water so no bottom is required. You want it to drain. The only detriment would be the staining of your patio bricks, etc should you want to move your bed later.

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Re: On patio - is a bottom needed?

Post  camprn on 2/3/2013, 4:34 pm

If it were me, I would lay down some cardboard then place the box onto it. Then I would line inside of the box with light weight weed barrier, just to keep the Mel's mix in the bed.

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Re: On patio - is a bottom needed?

Post  llama momma on 2/3/2013, 4:43 pm

I respect camp's input but personally I don't think the carboard matters much.
I think a bottom of weed barrier material would keep Mel's mix particles from draining out through the crevices. I would pull this material up to the top of the sides. And possible cement stains could be a personal concern. Still, I'd rather have cement stains and fresh food!
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Re: On patio - is a bottom needed?

Post  camprn on 2/3/2013, 4:53 pm

My reasoning for the cardboard would be more of a moisture retention tool.

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Re: On patio - is a bottom needed?

Post  llama momma on 2/3/2013, 4:55 pm

@camprn wrote:My reasoning for the cardboard would be more of a moisture retention tool.

So noted! Considering late afternoon sun and all.
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Re: On patio - is a bottom needed?

Post  donnainzone5 on 2/3/2013, 5:15 pm

In the recent past, the Foundation offered patio boxes with drilled plywood bottoms in the SFG Store. Over time, I gathered that it may be best to raise such boxes on bricks or such.

In fact, I've been wondering if these patio boxes will be available again.
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Re: On patio - is a bottom needed?

Post  Janas on 2/7/2013, 8:17 am

Thanks all for your advice, you've given me good input. Now I just have to see how many boxes I can squeeze into my irregularly shaped area!
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