Making Medicine, Part 1 of 5: Wild Harvesting Blue Vervain

This is the first of a series of five posts in which I am going to use the process of wild harvesting and making a fresh herb tincture of blue vervain (Verbena hastata) as an example to explain in detail the process of making medicine. You'll have to excuse me for having changed the title a few times. As I've been writing these posts, they've become longer and more detailed and less about blue vervain and more about making medicine in general. There are a lot of aspects of this process that I realized needed to be explained in detail. So this has been an evolving process.

A week ago, Monika (Monika Ghent, my partner and the Living Earth online course supervisor) and I went harvesting blue vervain. I decided that this would be a good herb to feature in in this series because the process is pretty typical for an herb for which we harvest the aerial parts. Also, being a wetland species, it allows me to address a couple of issues that are particular to harvesting in wetlands.

The home of blue vervain (Verbena hastata).

Back in the early 80s when I first started exploring wild spaces and eventually herbs in the rural areas beyond the boarders of Toronto where I lived, I used to look at detailed maps of the surrounding area to look for wild spaces where there weren't any roads and hopefully no development (that was before the Internet and Google Maps). When I found something that looked promising, my friends and I would drive around the area to get a sense of the landscape and determine if there were any trails accessing the area. In the winter I used to hike along the course of a creek near where I lived by walking on the ice. One winter day when we were exploring a new area I suggested that it would be easier and more interesting to access the area by walking on the ice along a river that flowed through. We didn't get as far following the meandering course of the river, but we didn't care. I have always preferred quality over quantity. After that day doing this became a regular activity for me. Sadly, for the last decade or more the winters in my area have been much warmer and the rivers rarely freeze. Occasionally when they do the ice is usually too thin to walk on.

The summer following our first river ice excursion we were heading out to explore a provincial park not too far away. We wanted to avoid most of the people and explore areas that weren't easily accessible by trails. I suggested that we walk up the river. So we put on old running shoes without socks and walked up through the river. We called it "water walking" and I've done it ever since. In the early days the only drag about it was the water sloshing around for awhile in our running shoes when we left the river. For a couple of years in the early 90s I took a bunch of workshops in New Jersey with Tom Brown. The first time I was down there a few people were wearing these really cool sandals that had adjustable Velcro straps. They were Tevas of course! They weren't very common yet and I had never seen them before. I realized at once that these were the perfect all-terrain footwear for use in warmer weather, and in particular for water walking. They were the one piece that was missing from water walking. I bought my first pair 20 years ago. I'm still on my second pair. That's pretty amazing considering they are about the only footwear I use (when I'm not barefoot) during the warmer months of the year. I wear them through just about everything when I'm harvesting, hiking, canoeing or camping.

So now let's get back to wild harvesting. Wetland plants often live in areas that are not easily accessible. The plant growth can be very thick and difficult to get through. There can also be deep muck that is hard to walk in. There is also a particular kind of grass that grows in wetlands that we call "sticky grass". I don't know what species it is. Grasses can be difficult to identify and I haven't devoted any energy to learning the many grasses because I don't use any of them. What is particular about sticky grass is that it has a row of tiny barbs along the mid vein of the blade that slices your flesh. If you walk through it with exposed skin you will get numerous cuts that are like paper cuts. It's not very pleasant. With these challenges in mind, in the early years when I first started wild harvesting the medicines I realized that the best way to access wetland plants is by water walking along the course of a creek or river, or along the shore of a lake. Of course it only works when the water isn't too deep. Another concern is that we have to be very careful not to step on any flat rocks because there are often fish, crayfish or other aquatic animals living underneath them.

Monika water walking while we were harvesting blue vervain.

So on July 1st Monika and I headed off water walking down a river that is not too far from where I live. Monika needed to harvest blue vervain and yarrow (Achillea millefolium), both of which are common along the banks of the river. That day I only needed blue vervain.

Whenever I pass through wild spaces I am always keeping track of lots of information: How healthy is the ecosystem? Which plants are growing there? At what stage are they in their life cycle on that particular date of that particular year? Do any of the medicines I use grow there and, if so, what is the maximum sustainable amount that can be harvested? What mammal, bird and other animal species live there? When I get home I record all of this information in a data base and update it every time I'm in the area. In this way whenever I need to harvest a particular herb, I have a quick reference to locations where it grows and approximately how much I can harvest at each location.

While I'm moving through the landscape I keep my mind quiet and tend to use my peripheral vision most of the time so that I can be aware of as much of what is going on around me as possible. Fairly soon after we started down the river last week I noticed a flash of red way off to my right in a clearing between some cedars. To my surprise I noticed some Oswego tea (Monarda didyma) that was just starting to bloom. It was early for these parts, but most species are blooming two to three weeks early this year because of the heat and the drought we have been experiencing. Oswego tea isn't very common in southern Ontario. It is much more common south of the Great Lakes. It only grows in a couple of the areas that I frequent and this was only the second time that I had seen it in bloom. Luckily I had my camera with me that day. In our area wild bergamot (Monarda fistulosa) is fairly common and that is the species that I use. When I first started using wild bergamot there was almost no information on it in the literature. There was a bit of information on Oswego tea and the few references to wild bergamot usually just said that it was very similar to Oswego tea. It is not uncommon for plants in the same genus to have very similar properties. Because several sources had made this comparison, I had assumed that they probably taste very similar. Then one day a few years ago Monika and I were walking along a deer trail on the bank of the same river further upstream from where we were last weekend. As we were walking I picked up a strong scent of wild mint (Mentha arvensis). I looked around where we had been walking and all I saw were some baby wild bergamot plants. I tasted a leaf and sure enough that was where the smell was coming from. I then realized that they weren't wild bergamot (although at that stage they looked almost identical) but rather Oswego tea. So it turns out that although Oswego tea is very closely related to wild bergamot, it tastes almost identical to wild mint. That means that the components of its essential oil are more similar to wild mint and therefore its medicinal properties are also probably closer to wild mint than wild bergamot. It seems that the information I had read was based on an assumption, not on experience.

Oswego tea (Monarda didyma), one of the friends I met that day.

Blue vervain grows along the edges of wetlands, rivers and lakes. In my area it rarely grows in large groups. It tends to grow singly or in groups of a few plants along the edge of the water or a bit further back in areas where it is wet in the spring and the soil remains fairly moist through the summer. As a result, it is necessary to travel some distance along the edge of the water to get a decent amount, especially since we don't harvest all of the plants.

A group of blue vervain plants growing along the bank of the river.

Blue vervain can tolerate a wide range of light conditions. It prefers to grow in locations where it will get direct sunlight 20-100% of the day, although 40-80% is ideal. In very hot dry years when the water level where the plant is growing is very low, it is best to harvest it in areas where it gets direct sunlight 20-40% of the day. On the other hand, in cool wet years it is best to harvest this herb in areas where it gets direct sunlight 80-100% of the day.

On this trip we were able to harvest a larger percentage of the plants that were ready because it hadn't been flowering for very long and only about a third of the plants were blooming. This year I only needed to harvest enough to make 2 litres of tincture because I made extra last year. I had already prepared 1 litre a couple of days earlier from a different location. Monika needed to make 2 litres as well. We had to water walk about 2 km along the river to get enough for both of us. In years when I need a fair bit I usually have to harvest at two or three locations to get what I need.

A closer look at the flowering spikes.

Blue vervain is harvested at the beginning of it's flowering period. The best time is from a few days to a week after it goes into flower. However, since all of the plants don't go into flower at the same time, generally the best time is one to two weeks after the first plants go into flower. In the area where I live, that is usually the second week of July. It was earlier this year because of the very hot, dry weather. It can be harvested a bit later, but like most plants the internodes (the sections of stalk between the nodes, the points where the leaves are attached to the stalk) get longer. This results in a higher stalk to leaf and flowering spike ratio and therefore a greater amount of stalk that needs to be discarded when we separate the usable from unusable portions of the herb. Also, the later we harvest it, the less time the plant has to produce more flowering stalks and reproduce. Typically we harvest the terminal 30-40% of the herb because this is the most potent part and it minimizes the amount of stress on each plant to regrow.

Me demonstrating how much of the plant to harvest. I am standing in shallow water in the river

and the plant is on the bank, so it looks about 6-8 inches taller than it actually is.

We had a great time water walking that day. It was quite warm, but a few degrees cooler than it had been. The sun was very strong, but travelling through the river there was a fair bit of shade. Water walking is great on hot days because walking through the water helps to cool us down. We also enjoyed the songs of many bird species and met a few friends along the way, both in and out of the water.

Some of the other visitors to the river on that day were

Canadian tiger swallowtail butterflies (Papilio canadensis) and...

...white-tailed deer (Odocoileus virginianus). We didn't see any deer but we heard them

bounding off as we approached. I usually only see them when I'm harvesting alone.

This is the end of Part 1 of this series. Later this week I'll post Part 2, in which I will be discussing preparing the blue vervain that I harvested in order to make a fresh herb tincture. In the third post I will discuss making the maceration; in the fourth, different kinds of equipment that are available for pressing and filtering tinctures; and in the fifth, the actual process of pressing and filtering the maceration to make the tincture. In the last post I will also provide information on the properties and uses of blue vervain.

Cultivated Vs. Wild Harvested Herbs

Here comes another one of the "background" posts that I mentioned. I took some photos when Monika and I were harvesting on Sunday and am going to do a post on harvesting blue vervain (Verbena hastata) soon, but I have a couple more background posts to do first. I'm doing a series of posts this week to kick this thing off. After that it will have to find its place in my schedule and the posts will be less frequent.

As I mentioned previously, the way I do herbalism necessitates that I make all of my own medicines. I also have a preference for using tinctures made from fresh herbs. That means that the group of herbs I work with are those that are native, naturalized or can be grown in northeastern North America, southern Ontario more specifically.

I don't grow many herbs. I've always primarily wild harvested them. When I tried growing them it was not very successful. I spend so much time wild harvesting that my garden tended to be neglected. I anticipated that and only planted hardy perennials, but over time my garden became over-run with plants such as goldenrods (Solidago spp.), asters (Symphyotrichum spp.) and tansy (Tanacetum vulgare). Although I planted hardy species, most of them couldn't handle being shaded by these taller plants. I just don't have much time for "weeding" and don't use the roots or rhizomes of these species, so digging them up isn't useful for me.

As a compromise, I have introduced some native and naturalized species onto the land where I live. In some cases they don't proliferate to a degree that I will be able to harvest them here, but they are good friends and I like having them around. In other cases plants that I have introduced have expanded quite a bit, some of them enough that I can harvest part or all of what I need right here. The key is to understand the kind of soil, moisture and light conditions that each species prefers. This is something that is easily learned by spending a lot of time with them in places where they grow naturally.

Musk mallow (Malva moschata) is one of the plants that I
introduced and now grows wild on my property.

Another thing that I do is pay close attention to what is growing on my lawn. Knowing how to recognize plants when they are very small and being attentive when I am mowing allows me to mow around the species of herbs that I use when they arrive here. By selectively mowing around these species it gives them a competitive advantage over the grass and other plants by allowing them to grow to full size and reproduce. Some of them multiply very fast. I have about 3/4 acre of mowed space around my house with many trees and shrubs, so there is a variety of amounts of light and moisture available. This is important if we want to encourage a large number of species to grow. It's amazing how many species arrive on their own. After mowing my lawn this way for about 12 years, there are now 96 species of plants that weren't there before I started mowing in this way. Of these, 22 were introduced. About half of the introduced species escaped out of my garden, whereas I introduced the other half directly onto my lawn. There are 38 species that arrived naturally, and 10 that I introduced that are either plants that I don't use, or herbs that I use but are not growing in sufficient quantity for me to harvest them. On the other hand, there are 36 species that arrived naturally and 12 that I introduced that are growing in sufficient quantity that I can harvest directly from my lawn some or all of what I need of each of these species to prepare tinctures for my clinic from year to year. Regardless of how plentiful they are, I use all of them as teaching tools as I run my classes and clinics out of my house. My lawn is my herb garden!

The view from my front door. Things are not as lush as

they should be in early July. We've had the driest

and hottest spring that I can remember.

Some of the herbs that are now growing

wild in my back yard.

Many herbalists, including myself, recognize the superiority of wild over cultivated herbs. However, it doesn't have to be that way. Assuming that herbs are grown organically (I'm not going to get into the numerous issues associated with the use of commercially grown herbs), there are essentially four reasons why cultivated herbs are inferior:

1. Cultivated herbs often aren't grown in conditions that each species prefers. Again this includes soil type and levels of moisture and light.
2. Cultivated herbs are grown in monoculture on bare soil. Plants need to be interspersed with other species. This reduces diseases and insect damage, and provides a bit of competition. Bare soil doesn't exist in nature except after a major disturbance. It increases erosion and loss of moisture from the soil and is an invitation for any plant that likes disturbed soil to grow there.
3. Cultivated herbs are babied. They are watered too much and "weeded" excessively. This may make them grow more lush and faster, but it doesn't make them stronger. In order to be strong and healthy, all living things need to struggle. When life is too easy they get weak. If there is a prolonged dry period, it's OK to water them. Too much stress will also weaken them. But we don't want to overdo it. We also want to take into account the amount of moisture that each plant requires. If it is a wetland plant and we can't plant it by a wetland, it will need more watering and probably some shade. Similarly, plants need competition. There are no "weeds", only opportunistic plants that take advantage when we screw up the balance of things or create habitats that they like. It's a good idea to keep out the invasive species or any plants that are large and will overshadow the herbs that we are growing. We also don't want to let our herbs get too overcrowded. Most of the "weed" species are medicinal anyway. We can harvest them as well. We just need to make sure that they aren't too competitive or plants that when harvested will result in too much disturbance of the herbs we are growing.
4. Cultivated herbs are usually harvested incorrectly. They harvest too much of the plant at the wrong time of day and the wrong stage in the plants life-cycle. This is because the scale necessitates it, both in terms of when and how much of the plant is harvested. They need to harvest herbs in a way that results in the greatest yield, and when growing a very large number of plants that need to be harvested, it isn't possible to be very picky about when they are harvested.

If we take these things into consideration when we grow herbs (or vegetables), the herbs we grow will approximate the level of potency and vitality of wild harvested plants. There's also the option of wild gardening: introducing plants where we live (as long as they are not invasive species). Once established, we can encourage them along in various ways.

This discussion is very important to the issue of wild harvesting. Although wild harvesting is a very healing and empowering activity, as more people become interested in it there is a very great potential that we can seriously impact wild populations in a negative way. This can happen even if everyone does their best to wild harvest in an ethical way. It is inevitable because there are just too many people living on this planet. So learning from the wild plants what their needs are and applying it by wild gardening or organic gardening that takes into account the specific needs of each species is a very important alternative to wild harvesting. It will become even more important as more people become interested in making their own medicines.