Composting in the desert

Anyone who gardens or simply cooks a lot of vegetables quickly finds out – you must have a compost pile! Vegetable waste translates into useful fertilizer and soil very quickly if you compost, so it is a huge waste NOT to create some composting system – not to mention the cost of buying bags of compost. Seems silly to buy compost when you have all the ingredients for it already, doesn’t it?

The composting system I learned back in the Southeast USA (and which worked wonderfully for me there) looked something like this:

IMGP2287

However, I have figured out that this system doesn’t work well out here in the hot, moisture-less air of the desert. You can’t keep the pile wet enough for decomposition to take place at a reasonable pace.

The above photo? It shows the compost bin about a year after creation. Instead of looking like a corral of hay, it should look like soil. As if further proof was needed, it’s stil got decomposing tomato skins in it:

IMGP2289

This is obviously not the system for the desert. Ripe compost is supposed to look like heavy, beautiful dirt, not like it’s still decomposing!

So I have moved on to the pit compost method. First I asked my sweetie pie to dig a hole for me and he kindly obliged. Then I filled the hole with a mix of vegetable waste and moldy hay. I covered it with a last layer of moldy hay and then topped it with some wood boards, mostly to keep the hay from blowing away in the wind, but also as a minimal critter control.

IMGP2278

I decided to do a two week experiment to see if the pit worked better. To start with I added this bin of vegetable waste on May 11th:

IMGP2280

I spread it in with my mulch pitchfork:

IMGP2283

…Covered it up with my insulating layer of moldy hay…

IMGP2284

…Then watered it:

IMGP2286

I watered it once a week then checked it two weeks later. The bin of vegetable waste has decomposed to this:

IMGP2435

Pretty cool, huh? In case it hasn’t fully sunk in for you, here’s the amount of decomposition I obtained in two weeks with pit composting:

Screen Shot 2017-05-25 at 4.09.18 PM.png

I’m ecstatic that this is working so successfully! I also noticed that the moldy hay I used as a top layer is decomposing much faster this way too, so much so that I needed to add another layer of moldy hay. Compare with my first photo of my above ground compost system with totally un-brokendown straw and you’ll understand why I’m excited.

The next part of this adventure in composting will be to add bokashi into the mix and see how it goes. I have heard Bokashi praised as a great way to compost in the desert since it requires little moisture. My stinky bucket of bokashi compost is just waiting to jump into this pit and join the party!

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s