No-Till, No-Dig Gardening
By Colleen Vanderllinden
Lasagna gardening is a no-dig, no-till organic gardening method that
results in rich, fluffy soil with very little work from the gardener.
The name "lasagna gardening" has nothing to do with what you'll be
growing in this garden. It refers to the method of building the garden,
which is, essentially, adding layers of organic materials that will
“cook down” over time, resulting in rich, fluffy soil that will help
your plants thrive. Also known as “sheet composting,” lasagna gardening
is great for the environment, because you're using your yard and kitchen
waste and essentially composting it in place to make a new garden.
No Digging Required
One of the best things about lasagna gardening is how easy it is. You
don't have to remove existing sod and weeds. You don't have to double
dig. In fact, you don't have to work the soil at all. The first layer of
your lasagna garden consists of either brown corrugated cardboard or
three layers of newspaper laid directly on top of the grass or weeds in
the area you've selected for your garden. Wet this layer down to keep
everything in place and start the decomposition process. The grass or
weeds will break down fairly quickly because they will be smothered by
the newspaper or cardboard, as well as by the materials you're going to
layer on top of them. This layer also provides a dark, moist area to
attract earthworms that will loosen up the soil as they tunnel through
Ingredients For A Lasagna Garden
Anything you'd put in a compost pile, you can put into a lasagna garden.
The materials you put into the garden will break down, providing
nutrient-rich, crumbly soil in which to plant. The following materials
are all perfect for lasagna gardens:
- Grass Clippings
- Fruit and Vegetable Scraps
- Coffee Grounds
- Tea leaves and tea bags
- Weeds (if they haven't gone to seed)
- Shredded newspaper or junk mail
- Pine needles
- Spent blooms, trimmings from the garden
- Peat moss
Just as with an edible lasagna, there is some importance to the methods
you use to build your lasagna garden. You'll want to alternate layers of
“browns” such as fall leaves, shredded newspaper, peat, and pine needles
with layers of “greens” such as vegetable scraps, garden trimmings, and
grass clippings. In general, you want your "brown” layers to be about
twice as deep as your “green” layers, but there's no need to get finicky
about this. Just layer browns and greens, and a lasagna garden will
result. What you want at the end of your layering process is a two-foot
tall layered bed. You'll be amazed at how much this will shrink down in
a few short weeks.
When To Make A Lasagna Garden
You can make a lasagna garden at any time of year. Fall is an optimum
time for many gardeners because of the amount of organic materials you
can get for free thanks to fallen leaves and general yard waste from
cleaning up the rest of the yard and garden. You can let the lasagna
garden sit and break down all winter. By spring, it will be ready to
plant in with a minimum of effort. Also, fall rains and winter snow will
keep the materials in your lasagna garden moist, which will help them
break down faster.
If you choose to make a lasagna garden in spring or summer, you will
need to consider adding more "soil-like" amendments to the bed, such as
peat or topsoil, so that you can plant in the garden right away. If you
make the bed in spring, layer as many greens and browns as you can, with
layers of finished compost, peat, or topsoil interspersed in them.
Finish off the entire bed with three or four inches of finished compost
or topsoil, and plant. The bed will settle some over the season as the
layers underneath decompose.
Planting and Maintaining a Lasagna Garden
When it's time to plant, just dig down into the bed as you would with
any other garden. If you used newspaper as your bottom layer, the shovel
will most likely go right through, exposing nice, loose soil underneath.
If you used cardboard, you may have to cut a hole in it at each spot
where you want to plant something.
To maintain the garden, simply add mulch to the top of the bed in the
form of straw, grass clippings, bark mulch, or chopped leaves. Once it's
established, you will care for a lasagna garden just as you would any
other: weed and water when necessary, and plant to your heart's content.
Advantages Of A Lasagna Garden
While you will be maintaining a lasagna garden the same way you would
care for any other garden, you will find that caring for a lasagna
garden is less work-intensive. You can expect:
- Few weeds, thanks to the newspaper suppressing them from below and the
mulch covering the soil from above.
- Better water retention, due to the fact that compost (which is what
you made by layering all of those materials) holds water better than
regular garden soil, especially if your native soil is sandy or
deficient in organic matter.
- Less need for fertilizer, because you planted your garden in almost
pure compost, which is very nutrient-rich.
- Soil that is easy to work: crumbly, loose, and fluffy.
Lasagna gardening is fun, easy, and allows you to make new gardens at a
much faster rate than the old double-digging method. Now your only
problem will be finding plants to fill all of those new gardens!