Foraging for wild food is a great way to experience the natural world and connect with something ancient and primal within ourselves. And in many ways, it can be a more healthy alternative to the assembly line foods we find at the grocery store. Not only is wild food much richer in essential vitamins and minerals, but foraging also provides much needed exercise. It's a combination of hiking and gardening. Before diving into the salad bowl that surrounds us, it's a good idea to be aware of some basic guidelines that will ensure that foraging remains safe and sustainable.
Before eating any wild plant, make 100% sure it's not poisonous.
Learn the few dangerous species in your area before venturing into the wild to forage. If you know what poisonous plants you may encounter, you'll feel more comfortable foraging for the edible species.
Don't rely on common names. Common names can refer to several different plants. Some wild edible plants share the same common names as poisonous plants. Latin names are more reliable. For example, Stellaria media refers only to common chickweed. Latin was chosen to classify plants and animals because it's a dead language, so we can't expect it to evolve or change. Common chickweed will likely have the same Latin name in a hundred years.
Find a mentor. Learning from an expert or someone more experienced will give you a higher level of confidence.
Use all of your senses. Don't limit yourself to visual ID alone. Lots of wild edible plants have look-alikes. Learn how to differentiate similar plants by smell, feel, texture, etc. It's not a rule, but in many cases, poisonous plants are unpalatable and rank smelling. That said, taste should only be used if you're absolutely sure the plant is not poisonous. Some plants, such as water hemlock, are deadly in very small doses.
Learn habitat. You won't find cattails on a high slope, and you won't find ramps in a swamp.
Learn companion plants. Many plants are commonly found growing nearby certain other species. If you see yellow dock, there's a good chance pokeweed will be close by.
Learn to follow wild edible plants through all seasons. This is important for two reasons. First is positive identification. When I was learning to forage, I misidentified the poisonous white snakeroot as wood nettle. I put the leaves in soup for a few months. Fortunately I only added it in small quantities and no one got sick. When it bloomed in July, it became clear to me that I had made a mistake. There are admittedly other subtleties of differentiation that I should have noticed, but the flowers were a dead giveaway.
Another reason to follow wild edible plants through the seasons is to locate perennial plants that you want to harvest in early spring. For example, by the time pokeweed becomes identifiable, it's often past the point of use. If you make note of it during the warmer months, you'll know where to find it when it first appears in spring.
Learn which parts of a wild edible plant are safe to use. Just because a wild plant is considered edible doesn't mean all parts are edible. For instance, while the ripe cooked berries of elderberry are safe to eat, the bark, stems and roots are considered poisonous. It's also important to note that some plants are only edible at certain times of the year. For example, stinging nettle shouldn't be used after it goes to seed.
Don't over harvest. Every population is limited. Even where wild edible plants occur in large numbers, the colony should be respected. Try to collect no more than 10% (or less depending on how much foraging pressure the area receives). And of course never collect any more than you will actually use.
Avoid foraging rare and protected wild edible plants. Many plants may be locally abundant but are rare throughout their ranges.
Only collect the part of the plant that you plan to use. If you're going to make file powder from sassafras leaves, there's no need to uproot the sapling. Just take what you need and leave enough to ensure that the plant will continue to thrive. A good rule of thumb is to harvest no more than 25% of a plant if you don't need the whole plant.
Consider cultivating wild edible plants in your garden. Many wild plants that are edible are easy to transplant and propagate. Ramps, for instance, are getting scarcer due to over harvest, but can be cultivated given the right conditions. Take the time to research growing conditions of rare plants in your area. There is a great resurgence of interest in foraging wild edible and medicinal plants. That coupled with diminishing habitat puts tremendous pressure on wild plant populations. This puts the responsibility of preservation on us.
Avoid toxic areas. Never forage for wild edible plants near busy roads. Most plants absorb lead and other heavy metals from toxic exhaust. And these toxins tend to settle in the soil even if the traffic no longer exists. Also avoid areas that are or have been sprayed with pesticides.
Know what part of the plant is safe in what season. This was listed above, but it merits mentioning again.
When foraging wild water plants, know the water source. This is especially important if you're planning to eat the wild edible raw. Eating plants that have grown in contaminated water is the same as drinking contaminated water. Chemical and heavy metal pollution are also concerns that can't be removed by cooking.
Only forage plants that appear to be healthy. Plants can be afflicted by disease, fungi, pests or pollution. Harvesting healthy plants minimizes the risk of illness and also means you're getting more nutritious food.
Get permission to forage. This may not be an obvious safety issue, but around here, not respecting property rights and laws could result in some pretty unpleasant consequences. It's also a matter of courtesy.
Improve Your Skills
The more you forage, the more proficient you'll become. Try to learn a new wild edible plant each time you go foraging. With each new plant, study all of its uses including medicinal. You'll become more and more comfortable with the natural world and all it has to offer as you broaden your catalog of useful wild plants.