I use a "windowed in" porch.
You will need
Sub-Pump (i used a 500 watt made for dirty water)
Plastic Bottle Caps
Hot Glue Gun lost of glue sticks
A awe on any sharp pointed thing you can use to poke holes in.
Scissors Sharp enough to cut garden hose.
A plastic barrel the size depending on how much tubing your going to need
trays as big as the shelves if they are not solid to catch water
Seed starting containers
Step 1: Step One: Arrange Your Shelving
The plastic shelves i drilled a hole into, and at the bottom they are linked with a drainage tube, into a smaller bucket.
Under the metals shelving i put a big plastic tray, i got these from a pizza shop that was going to throw them away.
MAKE SURE THE SHELFS HAVE ENOUGH SUNLIGHT, the place i set this up at has a lot of sun, So i did not set up any addition lighting here.
Step 2: Step Two: Setting Up Your Pump and Water Supply
1. Get a big barrel i had this laying around my house. Cut a hole into it big enough for the sub-pump to fit through.
2. Get a sub Pump this i got at a local swap-meet for 25 dollars (talked down from 45). It has a float shut off so if your water runs low it will stop, and not burn out your motor. it is a 500w, the size and strength depends on how far your going to push the water. This works more then enough for this project. And get a "dirty water" model as supposed to a clean water one so it has little legs to stand on inside the bucket, and wont suck its self to the bottom burning out the motor.
3.Take you tubing or small garden hose and connect them to the sub-pump most fit a garden hose, but i wanted to 3 small tubes, so i jammed three hoses into the cap that screws onto the pump. and filled it in with plumbers putty. Electrical taped the whole thing. I made these tubes just long enough to make it out of the barrel. This was so its easier to screw back on to the pump.
4. Put the pump tubing into the barrel fill barrel full of water (test pump see if you didn't get ripped off)
Step 3: Step Three: Irrigation Tubing
and every foot or so the long narrow loop around the plants connects to each other and in the middle of the connection is your sprinkler head.
On the 3 tiers i ran in zig-zag through it until joining it back to the splitter.
Step 4: Step Four: the Sprinkler Head
But basically there al the same two plastic bottle caps hot glues together then a hole on two sides or one depending what kind your making. And the hot glue gun melts a nice hole into them.
And take a push pin and poke some holes into the side you want the water to spray out, i used a spiral pattern.
Different types of sprinkler head i used.
1. The Mushroom - two caps joined hole at bottom short tube, and poke holes to spray out top.
2. The Umbrella - Just like the mushroom, longer tube but holes at bottom.
3. The Bottle Cap - Two Tubes go into it at the sides and the water sprays out the top.
For one month i saved the plastic bottles i used and had plenty for this project. I used the rest of the bottles for another project.
Step 5: Step Five: the Auto Watering Timer
I found a outlet timer on ebay, for 45 bucks. Now for this project you need to turn the pump on and off for as little as one minute. This timer has 2 outlets and and turn on/off things 7 days a week multiply times a day. It is really nice. To program it was very easy, I water all these plants once every other day for one minute form 6:00 PM - 6:01 PM.
MON-WED-FRI-SUN this has been keeping my plants very well watered. With Little water running off into the drainage trays.
Now after all that i went to home depot and saw this awesome power strip with a timer in it! for 19.99! so buy this its the same thing but with more outlets,4 use the timer and 4 have continues power.
Now plug in your sub pump to the outlet timer program your plant watering schedule and forget about it.
I fill this barrel about one a month.
Step 6: Step Six: Just Add Plants
My plants are growing at a frighting pace! 3 weeks from ago they were planted. you can see them now in some of the pictures
There you go im growing a dozen of varieties of veggies in my porch 4-8 weeks they will be planted in the back yard.