Tag Archives: grass clippings

free fertilizer vs. $16,000 fertilizer

amaranth
We a seemingly endless amount of weeding and thinning this weekend which gave us a nice amount of amaranth, pursulane, chinese mustard and micro-greens to have for salads. A small reward for all the time spent on our knees.
grass clippings
Scott also mowed our lawn and used the grass clipping in our newest experiment in the broccoli/cauliflower bed. We read a great article in Mother Earth News this weekend that explored the different types of organic fertilizer on the market. As you know, fertilizers must be labeled by their Nitrogen, Phosphorous and Potassium (N-P-K) levels. Being that nitrogen is a likely deficient in many soils, the author compared the fertilizers based on their per pound of nitrogen. She compares 17 different store bought organic fertilizers, the cheapest being SoyBean Meal (7-2-1) at $4/lb of nitrogen and the most expensive being TerraCycle Plant Food (.03-.002-.02) at a whopping $16,987/lb of nitrogen.

Or she says, you can just use ordinary grass clippings which contain anywhere from 2% – 5% of nitrogen. In most areas you can work in about half an inch into your soil, or put a 1-2 inch layer as a mulch on your garden bed and that will provide all the nutrients most crops need for a full season of growth! Not only will it provide nutrients, but the grass clippings as a mulch act as a good weed prevention and as a moisture retainer.

Usually we just put our grass clippings into the compost pile and let them compost. Doing that dilutes the nitrogen power down to about 1%, but the benefit of compost is that it departs its nutrients into the soil over a matter of years rather than in just one growing season.

Either way, obviously, is beneficial. And obviously much, much cheaper than buying organic fertilizer, wouldn’t you say? I don’t know, free vs. $16,987, you make the call.

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Filed under Fertilizing, just picked, Mulch, Our Weekends, what we've learned