Here in Ireland, most gardeners will plant
conventional annuals like potatoes, onions and carrots, and there’s nothing
wrong with that. Most, however, neglect the myriad varieties of each of these
crops, in myriad colours, and you could plant blue potatoes or purple carrots
if you like. More neglect the more adventurous crops that might do well in this
climate but remain little-known; yacon, daikon, oca, and others. Creative or
lazy gardeners with a bit of extra land might decide to let it fallow, getting
mileage from the nettles and dandelions for a while.
If you want to build a garden that truly looks
to the future, though, you could plant a forest.
It might seem like that growing a forest
contradicts the idea of growing a garden, that one means low, edible and annual
plants in rows, while the other means a landscape of tall trees and few edible
plants. When you plant a forest garden, though, you are combining the best of
both worlds – perennial crops, vines, shrubs and trees that produce food every
year but do not need to be re-sown every spring.
A forest garden also has a vertical
dimension that many kitchen gardens do not; low trees and shrubs that bear
fruit, berries and nuts; vines that bear similar fruit and berries, and
ground-cover plants that can be harvested anew each year. With many varieties
of plants close together, moreover, you can harvest throughout the year,
gathering leaves or buds in spring, summer crops, fruit and nuts in autumn.
The various plants help each other, as
different plants require different nutrients from the soil and so do not starve
each other. They also help keep different pests away, as the smell of one plant
not only repels insects from it, but from the plants around it. In this way, plants
in the wild help each other, and by planting them alongside each other we let
Nature do some of our heavy lifting.
To make a forest garden, you should first
look at your landscape and see what could grow there –in the case of our land,
a relatively dry patch of earth surrounded by bog. Then you begin planning a
design of trees that will yield what permaculturists call the seven Fs: food,
fuel, fibre, fodder, fertiliser, “farmaceuticals” and fun.
Take a compass and mark which direction is
the south, and considering putting have the highest plants on the north, to cut
down on the colder winds, and the lowest in the south to catch the maximum sun.
You also want to pay attention to the rising and sloping of the property, to
make sure you know what plants are getting the most sunshine and water runoff.
Plan a forest garden in vertical layers,
starting with the pieces that reach the highest and around which the rest of
the garden will turn: the trees. Make sure you allow a circle of sufficient
breadth for each tree to grow; until it grows out, and find out ahead of time
how large they tend to grow. If you plan a certain circle of space for them,
and they grow slightly beyond it, you can prune them, but you should let them
have a certain minimum of space.
You could plant fruit and berry trees like
apples, plums and cherries, as well as lesser-known species like guomi; nut
trees like walnut, hazel and oak also would prove valuable over time. Such
trees aren’t going to yield vast quantities of food right away, of course, but
in the meantime you can plant food-producing vines to climb up the trees –
blackberries and kiwifruit, for example – as well as shrubs under them, like
blueberries and lingonberries.
Further down still – for a forest garden
has food at every level – you can plant edible weeds like Good King Henry and
Fat Hen, as well as herbs that return every year. You can even plant some
regular crops like carrots and onions around your trees and shrubs, and
gradually segue from a regular garden into a forest garden over a course of
years.
It is true that a forest garden requires
some patience, and if you buy small trees from the nursery rather than growing
apple trees from seed, it could be several times more expensive than a
conventional garden. With the right species, however, you only have to plant
them once; you are investing in infrastructure like a house, only a forest
garden could last longer.