Raised beds are a great way to grow, and now is the ideal time to get them set up so you’ll be ready to plant early next spring. If you’re new to gardening, start with just one, you’ll be amazed by how much it will produce, and how much easier it is to manage.
There are many ways to build raised beds, so let’s cover some basics that you can adapt to suit your own site and needs. Gardening in raised beds lets you concentrate your efforts into a smaller area that makes weeding, watering, and tending a lot easier.
An ideal size is 3-4 feet wide by 8 feet long. You don’t want to walk in these beds, so this size is easy to reach across and walk around. The sides are made with 2×6” or better yet, 2×8” lumber. White cedar and hemlock are preferred since they are slower to rot, but they may be hard to find. Rough-cut pine is your next best choice, but if all you can find is common pine that’s okay, it just won’t last as long. Use wood screws to build a simple box.
You can either lay this box in your existing garden on prepared soil or right on your lawn. You don’t need to remove the sod but you do need to either kill it first or smother it. To smother it, mow the lawn short, then lay wet newspaper in overlapping layers of six sheets per layer to completely cover the area. Set your frame on top of the newspaper and make sure you have a full 12-inch-wide band of newspaper extending out beyond the frame on all sides. I have learned the hard way that it’s much easier to stay ahead of the weeds if you don’t let any grass come within a foot of the frame. Any closer and the grass will start popping up inside your frame and will be very difficult to keep out.
Some folks suggest using landscape fabric or ground cloth instead of the six sheets of newspaper but that material does not decompose or let your crop roots grow through. The thick layers of newspaper will smother the existing grass and weeds over the next several months and then will gradually decompose, letting your crop roots grow as deep as they want.
The biggest question is what to fill the bed with. There are many choices; the main thing is to use a variety of materials. Beware of the stuff sold as topsoil, it’s hard to determine the quality of what you’re getting. For a box that is eight inches deep, I suggest using no more than 2-3 inches of ‘topsoil,’ then filling it the rest of the way with other materials, and mix it all together.
Some of these other materials that are sold in bags that fit easily into the trunk of your car include composted manure, peat moss, various types of compost, shredded bark mulch and ‘black dirt.’ You can also scavenge a lot from your yard. Grass clippings, fallen leaves, pine needles, compost and sawdust are all good additions. Fill the bed to the top and mix these materials together as you go. They will settle and mellow over the winter and next spring you only have to scuffle the soil a bit to make a furrow to begin planting.
Don’t forget to maintain that foot of mulch around each raised bed to keep the grass at bay and I think you’ll find these beds an easy way to grow.
Photo by Amy Ivy.