I live in a small house without a garden, but still wanted to grow my own vegetables. I do have a small courtyard, which is partially covered, so I decided to give the popular square meter/foot gardening concept a twist: wheels!

I case of heavy rain I can put my garden in the sheltered area and in case of sunshine I can put it in the middle.

The inside of the planter is one meter by one meter (about 3 feet by 3 feet), the outside is 110 cm by 110 cm. Without the casters it is 28 cm high.

For the remix contest:

How to make an easy square-foot garden! by BigMac96

For the Epilog challenge:

What could I possibly do with a laser cutter? Oh boy, what couldn't I do? At first I would probably make some enclosures in wood and acrylic (well, boxes basically...) for electronics projects. When that gets old I would move on to some more advanced uses: engraving the anodized aluminium enclosure of one of my next projects, cutting precise mechanical parts (gears a.o.), selectively removing paint from the back of a sheet of glass, ... In summary: a lot of good content for many Instructables!

Step 1: Materials

I used the following materials:

3 square Douglas fir beams of 50 mm by 50 mm (each 3 meters long)
2 Douglas fir beams of 150 mm by 50 mm (each 3 meters long)
4 Douglas fir boards of 200 mm wide and 22 mm thick (you guessed it, each 3 meters long)
4 small rotating casters (two with a brake, two without a brake)
4 stainless steel bolts, each with a nut and two washers (to attach the casters)
8 metal braces (L-brackets), salvaged from Ikea furniture leftovers
130 Torx screws (40 mm) and 8 Phillips screws (60 mm) - your mileage may vary
Waterproof canvas, some nails and duct tape
12 kg of coconut coir bricks + water (can be substituted with bags of potting soil, about 180 liters)

I used rough lumber, so the measurements are not exact. You could make you life a little easier by using S4S lumber (surfaced on four sides).

And the following tools:

Miter saw
Drill press (optional)
Cordless hand drill
Table saw
Circular saw
Power sander
Shop vacuum
Chisels, hand plane, hand saw and hammer
Square, pencil, utility knife, measuring tape, sanding paper
Several drill bits, a 25 mm flat wood bit, a Torx T10 bit, a Phillips bit and a nut driver
Gloves, safety glasses, dust mask and earmuffs

Step 2: Bottom Frame

The bottom frame is made out of sturdy 150 mm by 50 mm beams. These beams were cut to 110 cm with mitered corners on the miter saw. The joints were glued and screwed together. Instead of using long screws to tighten the insides of the corners, I used L-brackets. These brackets will be on the inside of the bottom of the planter and will not be visible.

I will allow the pictures and annotations to do the rest of the talking.

Step 3: Casters

The casters were mounted on the corners using bolts. I drilled a hole on each corner on my drill press and used a 25 mm flat wood bit to countersink the nut. You could probably use a hand drill for this step as well.

Step 4: Top Frame

The top frame is similar to the bottom frame, but there is a rabbet on the inside to hold the side boards. Its a bit hard to explain, but the pictures should clarify!

The miters were cut on the miter saw and the rabbet on the table saw. I smoothed these pieces with a hand plane and a power sander (80 grit). I finished of the smoothing by hand with 120 grit sandpaper.

The pieces were again joined with glue and screws.

Step 5: Corners

The corners are cut to length on the miter saw, sanded and glued to the top frame.

Step 6: Sides

I cut the boards for the sides and bottom to length outside using a circular saw. the four side boards were mitered on the table saw and screwed into the top frame and corners using a lot of screws.

Step 7: Joining Top and Bottom

The sides/corners/top assembly and the bottom frame were joined using two 60 mm screws in each corner, from the bottom up (into the corner pieces).

Step 8: Floor

The five 1 m floor boards were screwed into the bottom frame.

Step 9: Water Proofing

I attached waterproof canvas by putting nails along the top edge into the inside of the top frame. I would advice using staples if you have a staple gun available. I also hit my finger in this step, awtsj...