Vegetable garden paths – design considerations
Vegetable garden paths are essential in your food garden. If designed correctly, they make the space more functional, beautiful, aid soil fertility and improve drainage.
Getting the right vegetable garden paths is not as simple as it seems. My blog this month gives a number of suggestions and I think you will be surprised at how simple changes to your vegetable garden paths can make such significant differences.
Before getting into the detailed suggestions, here are some over-riding principles for your vegetable garden paths:
- Paths are wide enough to give you easy access, with some paths wider than others so you can use a barrow in the wider paths (service paths)
- Path layout and widths are configured to maximise bed growing space
- Paths are easy to maintain and have multiple uses
- Paths provide functionality as well as beauty
- Path layout is designed to assist drainage
- Paths are designed to reduce your weeding
- The beds and paths are in permanent locations
Ratio of bed and path widths
A 30cm path width is certainly wide enough to walk along one foot at a time and to work on the beds. The main advantage with narrow paths is that you can allocate more of your vegetable garden space for food production within the beds. With a bed width of 80cm and path of 30cm, the ratio of path to bed is 37% and if the beds are 1.2m to 30cm paths, the ratio improves to 25% so you get an extra 12% of growing area and 12% less area of paths to manage. Thus more efficiency of space.
Its interesting to note that conventional market garden vegetable beds vary from 80cm to 2m wide, with path widths up to 30cm. The bed and path widths are largely dependant on the size of machinery used for cultivation. If you have a smaller organic garden where you work with your hands, then designing around the size of machines is not needed. But, regardless of the size of the food growing area, if you want to maximise growing space, minimising path areas.
In my own vegetable garden, I have 1m wide beds, easy access around the garden edges and 20cm wide paths. I have re-used old 20cm sleepers as my paths as you can see from the image. This ratio of 20cm to 1m beds gives very high planting space for the area. The area is about 100m2. For a larger area I would not use wooden sleepers for vegetable garden paths and would lean towards grassy paths. Such a format lowers the usable space ratio a lot as you need to have the beds wide enough to mow, but there are many advantages of using grass for vegetable garden as explained below
Commercial market gardens normally have cultivated paths (soil) which require constant weeding (with machines or lots of labour) and such market gardens will usually not have fixed beds so the paths keep moving with the cultivation. Thus the paths, compacted by machinery, end up being cultivated into the next crop. This makes it harder to keep to soil quality high, due to compaction and soil disturbance.
Grassy paths – The benefits of having vegetable garden paths in grass are many:
- easy to maintain with a mower,
- holds moisture and aids drainage,
- reduces erosion and loss of soil in heavy rain
- creates mulch for the garden beds (so long as you cut it before seeding),
- builds soil carbon,
- creates habitats for beneficial organisms that can easily move into beds,
- easy to walk on and does not get boggy and
- if you use sprinklers, then you will be growing more grass as organic matter for your beds and compost.
- Gives you more flexibility with design of the space, it does not need to be all straight lines and is low cost to establish
I think these benefits far outweigh the two main disadvantage which are:
- Grass needs to be managed to keep it out of the vegetable beds.
- Greater proportion of your gross space is taken up with paths.
See the image above of our local market garden called Millen Farm with grassy paths
Cardboard and newspaper – The advantage with these materials is that they recycle paper and can stop weeds. For me, this does not offset the disadvantages which are: they look messy, not easy to uniformly fit path spaces, not easy to walk on, break down into substances that include chemicals and will need renewing after a relatively short period of time
Wood chip mulch – This does break down into soil over a very long period of time, much longer if its hardwood. It will stop weeds for a period of time until they find their way through. Some disadvantages are: can create mould, is not easy to walk on, is slow to break down and can be acidic for surrounding soil.
Grassy mulch – I have used this for my narrow paths and it works well as its easy to walk on, has no chemicals (if its organic mulch), forms easily into paths and when it breaks down after 4-6 months you can shovel the path onto the beds to build up soil.
Crusher dust (granite) – This works incredibly well at aiding soil fertility and because of this weeds tend to grow through it fairly quickly. I have seen plants growing on edges of crusher dust beds grow like crazy compared to other plants in the veg beds.
Bricks, tiles or stones – Quite labour and materials intensive to create, but very durable and can be done to greatly enhance beauty in the space.
Exposed soil – Promotes weed growth, does not drain well, leaches out minerals, soil carbon and soil life. When it rains the paths get muddy and cannot be walked on. It is strange that with all these disadvantages, such paths are most commonly used in commercial market gardens, but that’s what happens when food growing is designed around machines.
I have used all path materials/mediums above in my many years of vegetable gardening (ah yes, carpet is another one). From all this experience, I feel that for a reasonable sized vegetable garden, use grassy paths for your service paths and use mulched paths for your “between bed paths”. If you have a bunch of timber or metal raised beds, used grassy paths between them. For a larger market garden space, experiment with a portion of your garden using permanent beds and grassy paths. I think you will be pleasantly surprised.
A quick reminder, our afternoon seasonal workshop is on August 4th and our 2 day workshop introducing you to biodynamic food growing is on 10-11 November 2018 at our gardens in Camp Mountain Brisbane, come along, I know you will enjoy it. More information and how to book here.
Lastly, we have many clients where we design their food growing spaces. We work with a number of the paths described above, check out our mentoring service here. We do it face to face in Brisbane and via video skype elsewhere in Australia.
Authored by Peter Kearney – www.myfoodgarden.com.au