Designed for skilled DIYers and Garden Pro's to unlock the power of Sub-Irrigation. Building a Self-watering Garden with SIPs is a simple, intuitive and straightforward process.
Follow these 9 steps for professional Self-Watering results.
Step 1: Preparing the Location
Key Take Away: Make it level and free from obstructions.
Sub-irrigation relies upon the reservoir at the bottom of your garden. Water naturally self-levels, so your main challenge is to make sure your reservoir is level! If it is not, either your reservoir will not fill evenly, or the water from the reservoir will flood up into the soil, drowning the roots and creating anaerobic rot - which isn't good!
- Rounded river rock or pea gravel
- Outdoor tile
Compressed earth, wood chips and grass are okay.
Crushed rock and gravel with sharp edges is to be avoided. These can cause the liner to become punctured over time.
If leveling the site itself is difficult, framing in a bottom to your garden is an excellent option. This allows you far more flexibility in leveling, by either elevating your garden on legs, or by building foundational frames that can be scribed to site.
Step 2: Building the Box
Key Take Away: Build a garden with an interior free from obstructions. Put any structural framing on the outside - make it easy to fold in your liner and install the SIPs.
SIPs are designed for building gardens to the full square foot. Each SIP is 12"x12" and clips together to form a grid of any size. They can be trimmed with a saw if necessary, but building the garden to suit tends to be easier. When you're building the raised bed, use a design that has all the structure on the outside. It's ideal to build the interior dimensions of your garden to the full foot, with no interior obstructions. This will make folding in the waterproof liner much easier.
Step 3: Drilling the Hole for the OverFlow
Step 4: Installing the Liner
Key Take Away: DO NOT puncture the liner! Make sure all liner folds are folded UP to the top of the garden.
- Step A: Place your pre-folded liner into your garden. Make sure it’s tucked nicely into the corners. Over time, water pressure will push it into the corners anyway.
- Step B: Begin by folding the flaps UP. All folds should end up at the top of the garden… think about how water travels and make sure you’re creating a sealed unit.
- Step C: Dry fit your liner so that you’ve got a nice, tight fit. The next step is stapling, so do any adjustments now.
- Step D: Staple the liner into place along the top of your garden. Try not to go below 1” from the top of your garden. If you’re going for a nice professional finish, consider the aesthetics of the staple pattern, or plan for a trim piece or cap for a nice, clean finish.
- Step E: Trim excess liner - once the top of the liner is stapled, take a utility knife and trim off any extra liner above to top rim.
Step 5: Installing the OverFlow
Key Take Away: Take your time. The OverFlow should be the only hole in the liner.
- Step A: Find the hole you drilled in the box for your OverFlow. Use your finger and press around on the inside of your garden to find the pre-drilled hole.
- Step B: Use your utility knife to cut a small X in the center. You want the X just a bit smaller than the size of the hole. Consider the size of the rubber washer and be careful not to cut an "X" larger than the gasket can cover.
- Step C: Insert OverFlow valve and tighten. Ensure that it is fastened snugly, and the rubber gasket is compressed to form a watertight seal.
Step 6: Click your SIPs and install your SIP grid
Key Take Away: Use the logo on the SIPs to help you orient them in the same direction so they clip together properly. Identify the one SIP with the hole cut in it - this is where your WaterStem will go - and position this SIP in the grid where it will be the most convenient to water your garden.
Click the SIPs together to form the grid size ideal for your garden. If the SIPs prove difficult to clip together, turn them upside down an press down firmly. Your SIP grid should fit snuggly inside your garden.
Step 7: Insert the WaterStem
Step 8: Fill Your SIP Garden with Soil and get Planted!
Step 9: Water your Garden and Get Growing!
Key Take Away: The WaterStem allows you to water directly to the reservoir. It's also doubles as a float gauge, indicating the water level in your garden. If in doubt - simply fill the reservoir until water begins coming out of the OverFlow.