Hydroponics is growing plants without dirt. Plants are grown with their roots in an inert medium. The medium can be perlite, rockwool, coconut husk, or rocks. They key is you keep the roots exposed to a nutrient rich water solution.

Hydroponic systems come in many didn't shapes and sizes. Today I'm going to demonstrate how to make a simple system using mostly things you have around the house. I did this with my 7 year old daughter on a recent snow day so it's also a great indoor winter activity.

visit captainhydroponics.com for more hydroponic system ideas or to just learn more about it.

Step 1: Gather Supplies

Before you start any project, it's smart to gather everything you need to avoid any mid-project surprises. Below is what you need today. Most items should already be in your house and the last 3 can be picked up at a local Home Depot.

Empty 2 liter soda bottle
An old sock (you can use any cotton material)
Black marker
Small mixing bowl
Cling wrap
Perlite (available at your local Home Depot or Amazon)
Peat Moss (available at your local Home Depot or Amazon)
Seed of your choice (I'm using lettuce in this example)

<p>I've read a tutorial somewhere on the site <a href="http://rebuildgarden.com/" rel="nofollow">http://rebuildgarden.com/</a> I follow and the results are very good</p>
<p>I'm kinda new to the whole hydroponics thing, but isn't this self watering and not hydroponics? I mean, because of the peat moss? If it were, say, perlite an vermiculite I would see the connection better, but you''re using dirt....</p>
<p>I believe this is a SIP - Sub-Irrigated-Planter</p>
How often should I water the medium? And do I need to change the water reservoir often? I made three of these for a school project! They are awesome and thank you so much!
<p>sir can we coca peat instead of peat moss</p>
<p>sir can we coca peat instead of peat moss</p>

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