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Tale of a Strawbale Raised Bed

Tale of a Strawbale Raised Bed
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Strawbale raised bed with trellising in place and seedlings planted.

One year, three friends and I decided to make a vegetable garden together. It would be built on one of our properties in the suburbs west of Minneapolis, and all of us would help maintain it and share in the harvest.

We built the garden in a mowed area of a field, near a source of water. We made a wire-and-stake fence around it and added an ornamental gate.

The beds were set in place first. We tried a variety of styles and shapes, from home-built wooden sided raised beds to a half whiskey barrel to a long, rectangular raised bed of strawbales.

We filled the various beds with a foot of topsoil purchased in bulk from a nearby landscape center. As the topsoil contained a fair amount of clay, we added several inches of peat moss and mixed thoroughly with pitchforks and shovels to create our growing medium. (I’ve since toured a peat farm and have very few qualms about using it, particularly that close to where it is harvested, but that’s a Rant for another time…)

We spread thick black plastic between the beds, covered with a layer of wood chips, to make weed-free paths. We also discouraged blown-in seedlings by keeping a mowed 6-foot buffer around the garden.

Our friend-supported garden in late summer.

This friend-supported garden (FSG, our alternative to a CSA) included quite a few little experiments, one of which was the raised bed made of strawbales.

Humid midwestern summers ensure that the bales hold water quite well and long, making them useful reservoirs of extra moisture for nearby plants. This seems particularly helpful for growing herbs that appreciate extra moisture — parsley and cilantro, for example — as well as for buffering other plants against drought. After setting our bales in place, we soaked them thoroughly with a hose, and when watering the plants within the raised strawbale bed, we gave the bales extra water as well.

Strawbale also holds heat well, so it keeps soil temperatures warm in raised beds. This helps plants that need certain soil warmth to succeed, such as the pepper/tomato/eggplant family, the squashes and melons, and herbs like basil. Any strategy for warming the soil is a boon in a short northern growing season.

Finally, strawbales make nice walls for sitting, and handy for setting things on too. Wineglasses, for instance, or baskets full of harvest.

Our strawbale bed grew cherry tomatoes and cukes underplanted with mini-watermelons.

Straw is different from hay, hay being the tops of the plants, which include seeds. Straw is the dried stems, and ideally it is fairly seed-free and slower to decompose than hay. Our bales stayed fairly rigid for a couple of years, despite being soaked in summer and having snow on them all winter, and when they were too soft, they could be broken apart and the straw used as mulch.

Speaking of straw mulch, we used it throughout this garden; it makes a great, lightweight mulch that deters weeds and retains heat and moisture in the soil. Fruits and veggies also stay cleaner and drier on top of the straw mulch, so they won’t rot as easily as they would on bare soil.

Full-sized watermelons are tough to grow in the short Minnesota summers, but these mini-melons take off in the warm, moist environment of the strawbale raised bed.

I hope to make some strawbale raised beds this spring in my new Boise garden, and it will be interesting to see how well they work in a dry climate. Anyone else tried them? What was your experience?

 

Posted by

Evelyn Hadden
on January 15, 2014 at 2:54 am, in the category Designs, Tricks, and Schemes, Eat This, Feed Me, Real Gardens, Shut Up and Dig.

4 Comments

    • Ginny Stibolt
    • 13th October 2016

    Evelyn, I love the FSG concept and that you experimented with various methods for growing your crops. Would you say that the straw bales worked best, and if so, will you be converting more of the beds to the bales? Thanks for sharing.

    • Evelyn Hadden
    • 19th November 2016

    Ginny, I think the strawbales were handier, serving as shelves and seats in addition to their primary function of holding in soil. They also added warmth and a cozy aroma. However, I certainly wouldn’t replace permanent raised beds with strawbales, not if the beds are in good shape.

    • Lizabeth
    • 26th November 2016

    My mom used straw for mulch but I love this idea! Will have to find a friend’s yard to try it since I don’t think my condo board will let me try it in one of the parking lot grass islands (although that would be the perfect spot: no trees and plenty of sun)

    • Evelyn Hadden
    • 3rd December 2016

    That median WOULD be a perfect spot, Lizabeth! For anything but lawn. Too bad the board wouldn’t go for it… though maybe if you presented them with a plan? My new book Hellstrip Gardening will be published in May, and there’s an entire chapter about dealing with HOA/condo/city regulations; I see lots of potential for big changes if we can share and imitate some of the success stories from around the country. Those little fragments are perfect areas to make a change from lawn to something more useful or more carefree (or both!).

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