In this 85 minutes DVD Produced by
EcoFilms.com.au,
Geoff Lawton walks us trough the theory of establishing a
food forest and then shows sub-tropical examples of food forests at different stages of maturity.
Summary
The Basics
The DVD starts by looking at the patterns of a forest. Geoff identifies 6 basic layers: Climax or
canopy, understorey, shrubs and bush, herbs, ground cover, climbers. He then adds clumpers,
root yield, palms for the tropics in general and emergent palms for the wet tropics.
But a forest is not just about the form, it is also a function of time through successions. Similarly, a food forest needs to get established with the support nitrogen fixing species that, along with their bacteria fauna will take nitrogen from the atmosphere and fix it into the soil.
As with natural forests, the support species are tiered. The first layer is the ground cover that is a short lived nitrogen fixer. It will usually last one season. The second layer is composed of the short term
legume trees that will usually last 4 to 5 years. The third layer is composed of medium term legume
trees that will last 10 to 15 years. The fourth layer is made of long term legume trees that will live to full term. At the same time the support trees are planted, so are productive trees: fruit and nut bearing, lumber trees. As time passes the composition of the forest will change from being mostly support trees to mostly productive trees. The different species all fit together in space as well as in time.
Geoff explains that the transition from the support species to the productive ones is sped up by well timed human interventions. When rainfalls are greater than evaporation, support trees can be
pruned (pollarded) to cycle nutrient faster, and create openings for light to penetrate the canopy. The branches that are cut are then used as mulch, which will protect and enrich the soil. Additionally, cutting branches forces the trees to shed
roots. Since the pruned trees are nitrogen fixers, these shed roots make more nitrogen available in the soil.
Geoff emphasizes that such systems can be established in any climates and that we have all the plants we need throughout the world to do so.
Food Forest Evolution
The second part of the DVD, shows food forests at different times, from the establishment to the a mature system. The examples shown are definitely for a sub-tropical climate, however it gives us a template to work from. The specific species can be substituted by some more adapted to the particular climate one lives in.
The first food forest Geoff shows is one being established. He shows a
swale that is being planted in the fall with ground cover plants and some nurse species. For the ground cover, they use a mixture of fast growing legumes: cow peas and lupin. They plant from seeds short to medium term trees, such as leucaena, and transplant long term legume trees (e.g. Ice Cream Bean tree) and productive trees (e.g.
Rose Apple tree).
Geoff then shows the food forest three months later, already bursting with plants. He walks us through the different species: Casuarina, a non legume nitrogen fixing tree; Tephrosia a N-fixing tree that will be used for chop and drop; Galangal, a culinary herb; sweet potato, an edible
perennial ground cover; comfrey, a dynamic accumulator;
mushrooms, the soil's teeth; and much more. With such a system, the plants fill in similar niches that would otherwise be filled by not so desirable plants. The design mimics natural weed systems.
Geoff takes us next to a three years old food forest. This forest is already pretty stable, with a consistent ground cover of sweet potatoes, and fruit trees already bearing fruits.
The next food forest is a six years old one. Geoff demonstrates the
chop and drop method and shows the amazing soil structure. He shows different legume and productive trees: tephrosia, tipuana tipu, cassia, banana,
coffee, and silky oak.
Outer Edge Food Forest
After showing food forests at different stages of development, Geoff takes us to an outer zone food forest and shows us that even with very little maintenance, it can be productive. This food forest has long term fruit trees that are producing on their own with very little to no human intervention: mango, custard apples, avocado, Jack fruits, etc.
Chickens, Weeds, Nursery, Kitchen Garden
Geoff goes into great details on how
chickens can help establish the food forest. He shows ground where the
chickens were 3 months ago, 1 month ago and as they are being moved. Through their scratching and pooping, they prepare the ground for planting, in addition to breaking the pest cycle.
The next part goes into how weeds can be used to repair the landscape. Geoff explains that some weeds will only germinate when the soil is compacted, others when it is too loose, and yet some other only after a fire. Along with animals, weeds are a tool to remineralize damaged soil.
Geoff subsequently shows the nursery where they start the plants for the new food forest. He then shows the kitchen garden, bursting with over 400 species of vegetables and herbs and fruits trees along the edge.
Tagari Farm
The DVD ends with a section filmed at Tagari farm, the original home of the
Permaculture Research Institute of Australia. There Geoff shows us a food forest that is about 9 years old and that has not been maintained for over 7 years. This constructed forest acts as a true forest in being self maintaining. It hosts a massive variety of productive plants: Jack fruit tree, chocolate pudding fruit tree, coffee tree, citrus, bamboo, banana, Brazil berries, custard apples, mulberry, macadamia. Geoff explains that with just a little bit of maintenance, the forest could produce even more.
In this extremely productive food forest, Geoff concludes the DVD on a very hopeful note: "We can inhabit the Earth for ever with little effort with ongoing permanent systems." The future is indeed extremely bright!
Bonus
On top of the excellent explanation on how to establish a food forest, the DVD also shows different examples of longer lived food forests: 30 years old food forest in Australia; 300 years old food forest in Vietnam; 2,000 years old food forest in Morocco.
Where to get it?
Ecofilms
Green Shopping
Amazon.com
Related Books and Magazines
Edible Forest Gardens (2 volume set)
by Dave Jacke and Eric Toensmeier
Vol 1 and 2 at Amazon.com
Vol 1 at Amazon.co.uk
Vol 2 at Amazon.co.uk
Vol 1 at Green Shopping
Vol 2 at Green Shopping
Creating a Forest Garden: Working with Nature to Grow Edible Crops
by Martin Crawford
Amazon.com
Amazon.co.uk
Green Shopping
How to Make a Forest Garden
by Patrick Whitefield
Amazon.com
Amazon.co.uk
Green Shopping
Forest Gardening
With Robert Hart
Amazon.com
Amazon.co.uk
Green Shopping
Permaculture Magazine Issue on Forest Gardening
Green Shopping
Related Podcasts
Paul Wheaton Permaculture Podcast #057 Preparing a food forest
Paul Wheaton Permaculture Podcast #070 Review of Geoff Lawton Food Forests DVD
Paul Wheaton Permaculture Podcast #089 Interview with Geoff Lawton Part 1
Paul Wheaton Permaculture Podcast #090 Interview with Geoff Lawton Part 2
Paul Wheaton Permaculture Podcast #195 Geoff Lawton on his Food Forests DVD
Paul Wheaton Permaculture Podcast #227 Spreading Permaculture with Geoff Lawton Part 1
Paul Wheaton Permaculture Podcast #228 Spreading Permaculture with Geoff Lawton Part 2
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Related Articles
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Related Websites
GeoffLawton.com
http://www.edibleforestgardens.com/
http://www.forestag.com/index.html