Category Archives: Lawns & Grass

Organic lawn care: a matter of definitions, or a moral dilemma?

I’ve got a question for all of you: Can an organic garden service that farms out toxic weed control still call itself organic? Has it sacrificed its integrity, its very soul, or is such language uselessly hyperbolic in such a case?

Let me explain how the question arose. Given the paucity of garden-related businesses that had booths at Bozeman’s poorly-named home and garden show (subject of one of my more acerbic posts), I had time for conversations with the folks staffing all three. Indeed, I swooped down on the two booths for organic gardening services, partly out of sheer delight that they existed, but in part to ask a highly pertinent question: How did they handle bindweed on a residential property?

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Fertilizing the Earth to Death: Thomas Hager on Nitrogen

Got an e-mail recently from a very interesting fellow who’s just written a book about the chemistry and ecology of synthetic nitrogen fertilizers, and if you haven’t had your fix of ecological chills recently, keep reading. The e-mail arrived in the midst of the Sock Wars, so I scrutinized it with more than ordinary vigilance, as if it might blow up in my face (revealing another face under a large hat, laughing madly), or as if the virus it harbored might bloom suddenly into sock-tossing flowers.

Having eventually decided (using a fool-proof method of one part deduction and eight parts pure guess-work) that the e-mail was legit, I followed the link provided and found myself reading a long and compelling passage about the unintended and dangerous consequences of nitrogen fixation, the basis for nitrogen fertilizers.

The fixation process, which takes nitrogen from the atmosphere (where it makes up 70% of the air we breathe) and incorporates it into compounds, has doubled the amount of nitrogen in and on the earth. When it’s applied to land as fertilizer, some of it is released as gas – and while some of that gas is the same harmless, inert N2 that we breathe all the time, some is now bonded with oxygen, forming the green-house gas nitrous oxide.

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Ashes: Almost the Perfect Lawn Amendment

The Soil Series # 3

Having gone on at some length a while ago (twice!) about how wood ashes aren’t going to cause lead or mercury or cadmium poisoning if you use them in your garden, I am now prepared to tout them as the nearly-perfect lawn fertilizer. Since it seems that I’ve adopted this poor, misunderstood amendment as my own, I might as well do it thoroughly.

Grass needs calcium, which might be considered a non-renewable resource in a lawn: once the roots have used it up, it’s gone. So additions are necessary. The most common materials for such additions are gypsum, which contains about 22% calcium, and lime, at about 30%. The calcium content of ashes varies widely depending on type of wood, but even softwoods will produce ashes containing about 15% calcium, and hardwood ash may be as high as 50%.

A couple of things make ash a superior amendment, especially for lawns. For one thing, both gypsum and lime are quite insoluble. The term “immobile” seems an excellent metaphor for how they behave when applied to grass, but it’s also the technical term for a compound that doesn’t dissolve easily and therefore doesn’t move with water into and through soil. As a result, it is hard to get lime and gypsum into a plant: unless they’re snugged right up against the roots, they might as well be on Mars, for all the good they’ll do.

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The Worst Amendment for Lawns: Sawdust. (Or, What I Learned Today #1)

Refusing to be scared off by unfortunate acronyms, I’m starting a whole series of posts to be titled What I Learned Today. This is the first.

As you can see from the #1 in the title.

Though I could have put that there just to confuse you.

But I didn’t.

I’m beginning to sound like Esther. Or Winnie the Pooh. Yippi!

Down to business:

A couple of years ago I read that sawdust was the last thing you wanted to sprinkle on your lawn (unless you liked that sickly yellow color), but I’d completely forgotten why. This did not keep me up at night until recently, when I was working on the soil amendments part of my endless organic lawn care article (I’m up to page 112, and counting), and wanted to say something intelligent about sawdust as an amendment.*

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The Blessed Rain

It’s been raining pretty much full-time for three days now, sometimes lightly, often steadily, and occasionally with a vengeance. Once or twice there’s been a smattering of hail. And it’s not about to stop; forecasts give it another three or four days before there’s even a hint of sun. I know this is the rainy time of year around here; and I know it’s good for the land, the farmers, etc. etc., but at times I find myself thinking, Enough, already!

Last week we had a couple of glorious days when temperatures were in the high seventies. Lovely! Now, along with endless rain, we have chilly weather: highs in the fifties, lows in the thirties and forties. (All Fahrenheit, of course.) It’s the end of May; I long for warm weather.

Still, living for the first time in a dry land, I cannot forget the value of water. Some seasons I check the rain index on the back of the newspaper’s first section every day, comparing what’s fallen this month to the month’s norm, then looking at the numbers for the year, what’s fallen and what’s normal. That’s four numbers for Bozeman. Then I check the numbers for Belgrade, fifteen miles west. Fifteen miles away and about five inches drier, because it’s out in the wide valley, while we’re tucked right up against the foothills of the Bridger mountains, where the clouds dump their loads of moisture before rising over the peaks and moving east.

Like much of the west throughout North America, we’ve had years of drought. My little corner has been luckier than most, but the threat of drought is still real. We watch the precipitation levels, and the river-flow levels, and we watch the snow-pack, because the snow-pack feeds the rivers, and the rivers feed the land, and the land feeds us.

If the snow-pack is low, that means a dry year. If a surge of hot weather comes early and melts the snow too quickly, that means floods. If the hot weather holds, melting the entire snow-pack by the end of June, that means floods and a dry year.

Winter banks our summer’s water in the snow-pack; we need a slow, frugal spring, releasing that wealth gradually. If it rushes from the mountains, it is gone, like money flung to the winds.

So I cannot entirely begrudge the rain, and the cold, which I know means that what falls as rain here falls as snow higher up.

Then too, when the clouds part and the mountains come briefly into view, streaked with white nearly to their knees, that’s a loveliness not to be disputed or denied.