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First greenhouse build. Zone 7b. 16’x10’. What can I do with this 5’ deep hole?
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First greenhouse build. Zone 7b. 16’x10’. What can I do with this 5’ deep hole?


I was thinking coil some kind of tubing for a geothermal heat/cool setup. Also thought about a big tank for water storage but I’d prefer water storage above ground. Hole is on the south side of the greenhouse.

by Orzal

17 Comments

  1. Fishmonger67

    Why is there the hole in the first place? I’m confused.

  2. MD_Weedman

    I doubt that’s enough area to use for geothermal, but I’d be tempted to try. You can just run PVC pipe in the bottom and push air through. I’d be temped to do that, then top with dirt, then put a big poly tank in there for water. Having water below ground will keep it from freezing without taking up much space. Just drop a submersible pump in there to push water through a line to water your greenhouse.

  4. HomegrownPassion

    Put a nutrient tank in there and set the greenhouse up for hydroponics!

  5. MeeksTheSqueaks

    Dig the rest up for a Walipini style greenhouse

  6. RuthTheWidow

    Tilapia waterfall pond for aquaponics?

  7. tingting2

    I don’t think 5’ is going to be enough to get any effluent use of geothermal. Any reason you put the green house over the old burn pit?

  9. T-bone_Gthang

    I’d put a floor over and use it as a secret stash pit

  10. Royal_Phase7178

    Do you have a source of manure? Chickens or horses?
    I’d consider filling it with a good heat generating compost (like wood shavings and horse poo) with a bunch of coils of pex or copper tubing and a pump to circulate glycerin from the coil to a few loops in the greenhouse floor, also covered in wood shavings. Keep the compost hole moist and topped off and they can generate heat well above 100f (and co2) pretty much indefinitely. May have to dig it out once every year or so, but you’d have a truck load of high quality black gold.

    I’d also consider inoculation of the compost with something like liquid IMO or JADAM Microbe Solution. That would get it going fast and hard

  16. Ok-Grab-311

    Just fill it w water and take a mud bath lol

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