How to Make a Self Watering Container

One of the best parts about making self watering containers for this project is that it’s cheap. Most of the supplies needed are either already laying around the house or you can easily get in your neighborhood.

Tools, materials and costs involved in making a self watering container:

5 gallon bucket (cost $0.00). I was able to get a boatload of these from the local bodegas by simply asking. Other places that you could check are your local delis or supermarkets.

12″x12″ vinyl tile (cost $7 for box of 20 $0.35/tile). Picked these up at the local variety store. Can sometimes go to tile store and get samples that they are throwing away.

20″ copper pipe (cost $25 for 10′. Cut into 6 20″ pieces $4-5/piece) This is the most expensive thing that goes into the containers. Priced out a few stores and saw upwards of $65 for 10′.

Plastic deli container (cost $0.00) Friends and family have tons of these, so asked them to save for me. Can use the various sizes for various containers.

Other tools -- marker, razor, scissor, drill with 1/4″ bit and duct tape (cost $0.00) I had all of these or was able to borrow them from people.

Total cost per bucket = $4.35

That’s pretty damned cheap.

Now that you’ve got your tools and materials. Here is how to assemble and put together.

Step 1 Put the plastic deli container in bucket and fill up with water using a measuring cup until the water reaches the top of the deli container. This gives you the amount of water that your reservoir will hold.

Write that amount along with the total bucket capacity, diameter and height on the bottom of the bucket. This will help you to keep records of what vegetables grew in what conditions.

Step 2 To make the insert for the self watering container. Trace the top outline of the bucket onto the vinyl tile. Inside of that circle, flip the container over and trace the bottom outline. This gives you a circle within a circle. Cut somewhere in between until the tile is able to rest on top of the deli container in the bucket.

Step 3 Trace the top circle of the deli container in the middle of the vinyl tile. Draw a “T” in the middle and then connect the lines to form a diamond. Use your razor blade to cut out the diamond.

The tile should now be able to rest on top of the deli container. This will allow the soil to wick the water up to the roots.

Step 4 Use your drill with the 1/4″ and drill holes all around the deli container. This enables the water to come in contact with the soil in the deli container and keep the plant hydrated.

Step 5 Measure the length from the insert to the top of the bucket. Write this down with the measurements from step 1.

Step 6 Trace the circumfrence of the pipe on the outer edge of the tile insert. Cut out the hole for the pipe.

Step 7 Put the deli container in the bucket, put the tile over it and insert the pipe. If it doesn’t fit perfect, fix it up and secure it with duct tape. Hold the bucket up to the light and mark a point that is just below the insert. Drill a 1/4″ at that point. This will make sure that you don’t overfill the bucket because it will spill out of the hole.

These self watering containers are out on my fire escape.

  • lbsiegel
    Mike, how many plants would you plant in each of those containers?
  • Mike Lieberman
    I packed in a lot this first time like 3-5 lettuce plants in each one, but would only do like 2-3 at most this year. Let the plants get a lil bit bigger and space to grow.
  • Micky3
    I love this stuff!
  • Man, is it supposed to take an hour to get the diamond cut out, or did I go wrong somewhere?
  • Mike Lieberman
    Definitely shouldn't take an hour to cut the diamond out. That's the easy part. Cutting the circle out takes a bit, but the diamond should be about 5 mins or so.
  • I just went to the store again. I think my tiles were some special extra thick kind, they had a clear glaze layer on top, and some black matting on bottom. I think the thinner stuff should breeze by.
  • Mike Lieberman
    How'd the thinner tiles work out for you?
  • They were very easy.

    I'm a little concerned, they have a sticky glue on the bottom for putting them on the floor, do you think that could contaminate any vegetables I put on them?
  • Mike Lieberman
    I left the peeling on. This year I'm likely going to get more containers and do a container within a container and get rid of the tiling.

    There is always a chance of something getting into and contaminating the vegetables (plastic, BPAs, copper, pvc, etc). Need to pick and choose the battles. Know what I mean?
  • I think I ran across the container in container idea, does it still use paint buckets?

    I have three where the peeling has come off, so maybe I will use them for flowers. Do you think patching them with duct tape would be too redundant?
  • Mike Lieberman
    Not sure I understand. What peeling has come off?
  • The peeling they put on the sticky tiles.

    One has all of it's peeling off, the others just have little patches.
  • Mike Lieberman
    Ok. Now I understand. Not sure the answer though.
  • mohawk
    MIke, major kudos for your willingness to document and share this wonderful idea. Could the lids of the buckets be used instead of the tile - cut em down to size? Please post photos of the crop
  • Mike Lieberman
    Thanks for the comment. Here's the link to making the insert

    http://www.urbanorganicgardener.com/2009/04/bui...
  • Deanna
    This is really cool. I've made something similar but used recycled "water" bottles. Cut the bottom off and inserted into the pot upside down (with the cap removed). Mulch on top to help retain water. Not as pretty as the copper and would eventually break down but lasted for a growing season.
  • Mike Lieberman
    Thanks Deanna. I like that idea. Hmm, might use that for this coming season and hang them.
  • gloriabrownbates
    I think the phone books are a good insulation between the containers and the cold metal. What a good idea. Gloria
  • Mike Lieberman
    Thanks. They've been workin well so far. The greenhouses have been good for the fire escape, but not great for the backyard. Should've built something larger there.
  • gloriabrownbates
    I was wondering how you protect your containers during the wintertime.. I know it gets very cold there! Goodness! Also, do you always plant from just seeds?
  • Mike Lieberman
    This was my first time. I didn't start from seed this time. Next year I will start some from seeds.
  • gloriabrownbates
    You have made me begin to think about garden container growing. Thank-you.
  • Mike Lieberman
    Thanks for the comment. Don't think about starting one. Grow one.
  • Karen Cook
    Copper's not cheap; if you can get pvc, it's used for cold water lines in houses and pretty much the same material as the bucket, and costs about 1/10th the price of copper. Instead of $4.35, the cost would be about a buck.
  • Mike Lieberman
    You are correct Karen. It would be cheaper, but I didn't use PVC pipe because of the harmful potential to leach plasticizers and chemicals into the water, soil and vegetables. Wanted to strike a balance between price and health.
  • lagreca
    I completely agree that you need to pick your battles. I'm just not sure that copper is any safer than using PVC.

    http://tr.im/Oun6
  • Mike Lieberman
    Thanks for the link. I'm not sure either. I spent a week researching it and found negatives on both with a slight skew towards more negative of PVC. I wanted to move forward and not spend the rest of my time researching, so I just went with the copper.
  • lagreca
    First I wanted to say thanks for the AWESOME video.

    I was also wondering about using PVC instead of copper, but what you said makes sense. That leads me to wonder about the chemicals in the vinyl tile. I'm wondering what else could be used that might be a little safer.

    As far as getting buckets, my father in law works in construction so he can probably get lots of old paint buckets. But I would be concerned about the chemicals from the paint and the buckets themselves. I think I would be better off getting them from grocery stores and restaurants. Food grade buckets will probably be MUCH safer for growing.
  • Mike Lieberman
    Thanks for the comment. Yes I hear you about the vinyl tile. Got me thinking to. This year, I'm likely going to put a container within a container instead of using the vinyl tiling. I think that should be somewhat safer.

    I'd definitely use the containers from grocery stores and restaurants than the construction site.
  • lagreca
    Will you be making a follow up video showing how to construct the new
    container within a container construction? That would be quite
    helpful. Thanks.
  • Mike Lieberman
    Once I get some made. I will most certainly post the how tos.
  • lagreca
    A question I had while thinking about designing a self watering planter is, what are the minimum and maximum dimensions of the reservoir? How tall or wide can/should the wicking basket be?
  • Mike Lieberman
    For the 5 gallon buckets, I've found that half pound deli containers to work the best.
  • s_trevor_sh
    so do you have to continually monitor and fill the reservoir, or do you just let rain water fill it trough the copper pipe?
  • Mike Lieberman
    I've found that it depends on the vegetable. Tomatoes and celery definitely require watering frequently, but others can go a few days without watering. Depending on the container you use, you'll be able to see the water line.
  • Thanks. This is great. I have a few vegetables in containers but it's hard to keep the watering up in summer. We have really prohibitive water restrictions here in southern Australia, but this should solve the problem.
  • Mike Lieberman
    Cool. Let me know how it turns out for you. It definitely helps to lessen the watering.
  • cityslipper
    Wanted to let you know that I absolutely love your video. You've created the poetry slam of small-space gardening. If things ever slow down, I'm going to work your video into one of my blog posts during the winter. Thanks for posting it!
  • Mike Lieberman
    Thanks Daniel. It's been fun so far. Besides being fun, everything has been much more productive than I anticipated as well, which is a bonus.
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