# Drainage question for mobile raised bed

**URL:** <https://forum.farmbot.org/t/drainage-question-for-mobile-raised-bed/9077>\
**Category:** Getting Started\
**Created:** [May 3, 2024, 9:40pm UTC](https://forum.farmbot.org/t/drainage-question-for-mobile-raised-bed/9077 "2024-05-03T21:40:17Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![yok](https://forum.farmbot.org/letter_avatar_proxy/v4/letter/y/b487fb/32.png) [@yok](https://forum.farmbot.org/u/yok)\
**Post date:** [May 3, 2024, 9:40pm UTC](https://forum.farmbot.org/t/drainage-question-for-mobile-raised-bed/9077/1 "2024-05-03T21:40:17Z")

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Hello. I have purchased a Farmbot Express v1.1 and the Mobile Raised Bed to the instructions here: [Building a Mobile Raised Bed | FarmBot Express Documentation](https://express.farm.bot/v1.1/assembly/supporting-infrastructure/building-a-mobile-raised-bed)

I see that I am supposed to put a tarp in before adding the soil, but am confused about drainage. How would I drain if there’s a tarp unless it’s somehow permeable. I see several other questions in the forum about drainage with the mobile raised bed, but none seem specifically answered except that drainage is indeed important.

I’d be very appreciative if someone could help me out with what should best be done. Thank you.

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**Author:** ![ldgaley](https://forum.farmbot.org/letter_avatar_proxy/v4/letter/l/ecb155/32.png) [@ldgaley](https://forum.farmbot.org/u/ldgaley)\
**Post date:** [May 4, 2024, 2:45pm UTC](https://forum.farmbot.org/t/drainage-question-for-mobile-raised-bed/9077/2 "2024-05-04T14:45:39Z")

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You need to use a permaeble cloth. I used a standard landscape fabric. You don’t want to use a solid tarp.

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**Author:** ![yok](https://forum.farmbot.org/letter_avatar_proxy/v4/letter/y/b487fb/32.png) [@yok](https://forum.farmbot.org/u/yok)\
**Post date:** [May 4, 2024, 3:35pm UTC](https://forum.farmbot.org/t/drainage-question-for-mobile-raised-bed/9077/3 "2024-05-04T15:35:58Z")

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Got it. Thank you.

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**Author:** ![mvillion](https://forum.farmbot.org/user_avatar/forum.farmbot.org/mvillion/32/5152_2.png) [@mvillion](https://forum.farmbot.org/u/mvillion)\
**Post date:** [May 11, 2024, 3:42pm UTC](https://forum.farmbot.org/t/drainage-question-for-mobile-raised-bed/9077/4 "2024-05-11T15:42:49Z")

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For my farm bot, I went for a plastic sheet to prevent the wood from rotting where it touches the soil.  
I did make one small hole at the bottom of the lower part as drainage. My thinking was IF there is water buildup, it will need to drain out somewhere and I would prefer to have the water damage one small area rather than all of it. So far, not one drop has left via the drain but my FB is in a polytunnel so it does not rain.

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**Author:** ![system](https://forum.farmbot.org/user_avatar/forum.farmbot.org/system/32/4564_2.png) [@system](https://forum.farmbot.org/u/system)\
**Post date:** [June 10, 2024, 3:43pm UTC](https://forum.farmbot.org/t/drainage-question-for-mobile-raised-bed/9077/5 "2024-06-10T15:43:25Z")

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Closed on June 10, 2024, 3:43pm UTC

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