Going Green At Home - Part 3

In Part 1 of Going Green At Home, I talked about deciding to use a front patio space for a raised bed garden. We left off at having put the 8 x 5 x 1 frame in place. Now, let's get down and dirty - let's talk soil.

First, you need to do your math to figure out how many cubic feet of soil you need. Next, you need to decide on the mix. In Tucson, where's it's pretty dry most of the time, a soil that holds moisture is vital to success.

You can go to any garden center and buy a soil mix, usually they carry something appropriate to your area. However, you can also mix your own. In our case, we did the math and figured out we could save about $60 on soil by creating our own mixture - and the added benefit was we could control exactly what went into that mix.

We chose to add a lot of vermiculite - (make sure the vermiculite you choose is asbestos free). Vermiculite holds moisture and acts like a sponge, releasing moisture slowly. Of course, we added organic compost and other soil components to develop a nutrient rich soil mix.

The trick in mixing your own is that you have to deal with bags that are different sizes - some come in 1 cubic ft., 2.2 cubit ft. and so on. Once you decide that you want a soil mixture of say, 30% vermiculite, you need to calculate how many cubic feet that is and then how many bags you'll need. (All I can say is, do your math a couple of times to be sure you're correct and save your receipt).

If you're going to mix your own, make sure you either mix it in place (which is a bit tricky) or have a tarp of some sort. We found that by mixing our soil in three batches and rolling it back and forth in the tarp, we got a good distribution of the various components and had a beautiful soil mixture. We dumped it into the raised bed and repeated two more times until the bed was full. If you find your bed is full after two rounds, just return the unused (and unopened) bags (which is why I highly recommend you save your receipt).

Once you've got your soil in, you can start watering (to hydrate the soil to it doesn't suck the moisture out of your seeds or starer plants). However, we decided that putting a grid in would help - most container gardening books recommend it so you can remember where you planted what - so we used lath to demarcate the sectors. You can make them whatever size you want, we stuck with the standard 12" x 12". The result was an organized grid system that we can track what's been planted where and when.

Next up - planting, growing, marveling.