I put this planter together for a container gardening class i took- turns out i was the only one who made my own container! i designed it to bring a splash of green to our cramped north facing entryway. it turned out better than i could have expected, so i thought i'd share. it was made with stuff i found on the street or had lying around (except the plants, which i chose specific for this project).
you can use any kind of spice rack or vertical container, just keep in mind that bare wood will flex/ warp/ decay if exposed to lots of water/ weather, and plastic will get VERY brittle if exposed to sun. you can also make your own 'boxes' for your plants (as i did), or find pots/ trays that fit your rack.
Next, make the little containers to fit. i used black cordura so it would hold up to the water/ sun/ soil. so far (2yrs), it's still plenty sturdy, but now covered in mineral stains (those white deposits that often collect on the outside of terra cota pots). choose a color that will accent your plants.
i sewed mine, but you could also buy pots to fit, or used some basic origami boxes.
this is the 'pattern' i used for my small boxes (i also did some longer ones, but i'd rec against it- they are hard to manage when filled with dirt & plants).
fold along the gray lines, then sew or glue the sides in place. sewing seemed the most sturdy, and so far has held up well (i used cheap poly thread). finished product is like a 'chinese food' take out box.
i sewed a piece of screen into the center, to provide drainage for the finished container (see next pic).
time to plant! i picked lots of shade tolerant ferns and little edge plants, since i knew my garden was to be mounted in a north facing entryway.
i should have left more space between plants, but i was doing this for a class, and wanted it to look good right away. generally speaking, leave room for them to grow/ fill in.
here's my garden mounted in my entryway! i put drainage holes in all the upper 'boxes' so water would drain down thru the plants. i then lined the bottom box with fleece to wick the moisture up to the air (see the box in the background of pic at step 4), but not drain all over my front step.
it worked really well, possibly too well- the plants got a little overgrown and i had to pull a few out!
remember when you mount this- wet dirt is really heavy, plan accordingly!