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Extra Large SIP -- how does this sound?

Posted by ltalent z5-6 (My Page) on
Mon, Jun 4, 12 at 18:08

I've only made one sip so I wanted to check in with some more experienced people before proceeding.

I want to turn a large custom planter into a SIP. Planter is 24 X 24 X 48. Drainage hole is 2 inches up on one side. Unfortunately, the fabricator just told me it won't be 100% water tight because there are casters.

So, I thought I would use plastic storage bins (17x20x5) cut down to two inches and run a piece of piping through them so the water spreads between them. I will also include a couple of 2" supports inside to ensure they don't buckle under the weight. I could add a strip of drainage mat above that to guarantee a little air.

My questions is what to put in the middle to draw up the water? There will be 20 inches of soil above.

Should I just use a plastic pot filled with soil in the middle of each container and drill holes in them?

Do I need an actual a wick to draw water up?

I hope this makes sense.


Follow-Up Postings:

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RE: Extra Large SIP -- how does this sound?

What's SIP?


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RE: Extra Large SIP -- how does this sound?

SIP = sub irrigated planter. Similar to 'self-watering container'.


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RE: Extra Large SIP -- how does this sound?

I built some out of some old, plastic containers with holes drilled in them.

I built my first SIP a couple months ago. I used a 20 gallon tote. OMG. The two tomato plants in that SIP are doing wonderful.

I simply made sure my growing medium was nice n moist (I layered n sprayed as I filled my tote) and watered from the top for a week or so.


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RE: Extra Large SIP -- how does this sound?

I made an extra large SIP planter recently based on the article in family handyman. link to my thread
I used raybo's 3:2:1 mix and For last two weeks I have not watered the plants and they seem to be getting their water just fine. The float says that half of the water is used. So that mix has worked great to wick water. Here is a link to the earthtainer construction (which has information about 3:2:1 mix in the appendix I think)


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