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Drainage and lining a lifted bed

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Drainage and lining a lifted bed

Post  TSHRED on 1/6/2015, 9:47 pm

I'm always looking to make my beds better as I design them. I'm at the point where I have bought the thick plywood and as I ponder the drain holes to drill I thought of this...

To keep the water off the bottom I'm considering lining the bottom and up the sides a bit with a heavy mil plastic liner of some sort. I'd drill drain holes and fit say 2" irrigation drains or plastic shower drains over the holes, screw them down tight and seal them to keep the soil in place. Irrigation drains have a sleeve made to insert into a pipe. I'd put that sleeved end through the drain hole. No water on the inside bed floor.  

What is a good inert liner or just get any strong plastic? I want these beds to last.
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Re: Drainage and lining a lifted bed

Post  camprn on 1/6/2015, 10:35 pm

Just curious... How long would you like them to last? and did you buy marine plywood? I'm thinking about the next boxes I set up I may coat with bees wax. or something... thinking

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Re: Drainage and lining a lifted bed

Post  TSHRED on 1/6/2015, 10:44 pm

@camprn wrote:Just curious... How long would you like them to last? and did you buy marine plywood? I'm thinking about the next boxes I set up I may coat with bees wax. or something... thinking

Great question. Not sure but at least 5 years or more. No I didn't buy marine ply.

Some drains I'm looking at:




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Re: Drainage and lining a lifted bed

Post  sanderson on 1/7/2015, 12:58 am

Camp, what are the bottoms of your boxes? Plywood with holes, or boards with gaps?
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Re: Drainage and lining a lifted bed

Post  sanderson on 1/7/2015, 1:02 am

@TSHRED wrote:I'm always looking to make my beds better as I design them. I want these beds to last.

Cinder blocks!  Brainchasm in Las Vegas has his on the ground but I don't think he has to worry about tree root intrusion as most don't have trees in their back yards. Very Happy
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Re: Drainage and lining a lifted bed

Post  AtlantaMarie on 1/7/2015, 6:35 am

Someone recently was talking about some TT (Table Top) beds (or at least raised beds) that they used some sort of wire as the underneath then lined it with Styrofoam-type insulation.

That would be a lot lighter than plywood...
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Re: Drainage and lining a lifted bed

Post  camprn on 1/7/2015, 6:45 am

@sanderson wrote:Camp, what are the bottoms of your boxes?  Plywood with holes, or boards with gaps?
I have both, without liners. The plywood bottoms I have simply drilled 1/2 inch holes.

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Re: Drainage and lining a lifted bed

Post  TSHRED on 1/7/2015, 9:12 am

How much water comes out of the drain holes at each watering? Noticeable? 
I understand that would vary depending on how much volume applied but I'm just looking for an average.
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Re: Drainage and lining a lifted bed

Post  sanderson on 1/7/2015, 1:57 pm

Yes, noticeable. The amount that would drip out the bottom of a box set on the ground. At least you will see how much drips out. You can also set drip pans (9 x 13" metal baking pans underneath and use the compost tea to feed other plants on your property if it bothers you.
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Re: Drainage and lining a lifted bed

Post  TSHRED on 1/7/2015, 2:57 pm

@sanderson wrote:Yes, noticeable.  The amount that would drip out the bottom of a box set on the ground.  At least you will see how much drips out.  You can also set drip pans (9 x 13" metal baking pans underneath and use the compost tea to feed other plants on your property if it bothers you.


Thanks for that info. I'm gonna forgo the plastic liner and shower drain idea. I've drilled 1" holes and will cover with landscape cloth like you did.
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Re: Drainage and lining a lifted bed

Post  sanderson on 1/7/2015, 3:26 pm

Very Happy
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Re: Drainage and lining a lifted bed

Post  NAR56 on 1/7/2015, 4:11 pm

While looking at the shower drain, you can ask them (Big Box Hardware store person) about the PVC / rubber liner for showers that will be tiled. It either comes as a kit or can be purchased by the foot. It may cost more than a plastic lining but it will last longer.

Ryan
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