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Digging Burdock Root for medicinal benefits

Learn when to harvest burdock root for maximum potency

As the fall season wanes into winter, I eagerly look forward to medicine making for harvesting the benefits of burdock root.

Last week we had the first hard frost of the winter season, earlier than usual in these mountains. That's a marker because it means the perennial and biennial plants send their energy down below the ground to store over the winter. Delighted, I got out my shovel this week to harvest burdock root!

As the moon wanes toward dark, the plants concentrate more on developing their roots underground. So this waning/dark moon and the next—which falls over winter solstice—are especially potent times to harvest herbal roots for medicines.

When to harvest burdock root

I first started courting burdock when I was a budding herbalist studying botany and biology in college, including an independent study on plant identification. I decided I would start with wild plants that I could eat—knowing that would be the best way to keep a hungry young woman motivated to learn her herbs! 

Aware that burdock was edible, I noticed that when I went walking near my home in the early winter, I would come back with big burrs clinging to my pants. The next time I walked that loop, I brought a shovel along. I practiced rolling her botanical name over my tongue as I walked: Arctium lappa

With high hopes on that first burdock harvesting adventure, I followed a stalk covered in burrs down to the ground and dug it up. Alas, all I found was a black slimy mess!

What I didn't realize at the time is that burdock is a biennial plant.  Standing with my shovel in hand, that fact suddenly seemed a lot more relevant than it did in botany class. To properly harvest burdock root, I needed to distinguish between her first year and second-year features. Take a look...

First year burdock

The first year the plant puts out a low rosette of leaves and stores her energy below ground in the roots. Therefore, the optimum time to harvest burdock roots for food or medicine is during the winter of the first year.

Second year burdock

 

During the second year, the plant sends up a flowering stalk with purple, thistle-like flowers, which develop into brown burrs in the fall. The roots of the second-year plants deteriorate as the energy goes into seeds for creating more baby burdock plants. 

Identifying features of burdock

When identifying burdock, look for the purple thistle-like flowers in summer that develop into the brown burrs in fall. The large, broad leaves are somewhat triangular in shape with wavy edges. The leaves are fuzzy, with light-colored undersides.  

If you rub the leaf with your fingers and touch the finger from the underside of the leaf to your tongue, you'll immediately taste the strong bitter flavor from the back of the leaf.

The species that is most common in the mountains of North Carolina is Arctium minus. While Arctium lappa is the species most commonly used in the herbal world, both can be used interchangeably medicinally.

The primary difference between the two is noticeable in the size of the burrs: A. lappa has large burrs 1" across, whereas the burrs of A. minus are about half that size.

Harvesting burdock 

Burdock has a very deep taproot, extending a foot or more into the earth. Some roots are as thin as a pencil while others are much thicker. Burdock roots grow so deep that we must loosen the soil deep below the ground before we can harvest the root.

The technique I've found most effective is to dig a ring or trench around the root, scooping out the soil.  Then you can gently pull to ease the root out without breaking. See this video clip from my burdock dig this week (a one-minute video, sped up from the 3 minutes it took to dig that root).


Benefits of burdock root

Just as burdock's roots grow deep in the ground, her action is deeply nourishing in the body.

Burdock is a powerful tonic for the liver, kidneys and spleen.

A favorite of macrobiotic cooking, burdock adds a mildly sweet, earthy flavor to stir fry, cooked vegetables, or in soups. 

You can eat the roots for those benefits, or preserve them by making medicine.

Making medicine with burdock root

10 step recipe to make your own herbal tincture from medicinal roots

  1. Harvest the roots by digging a ring or trench around the root, scooping out the soil a little bit at a time until you can gently ease the root out
  2. Look through the roots and discard damaged parts
  3. Wash the roots to remove all dirt (Note: only wash roots when creating a tincture)
  4. Chop the roots with a knife or put in a blender with the alcohol
  5. Fill a jar to the top with the plant material, packed tight
  6. Fill the jar to the top again, with 100-proof vodka, and cap
  7. Label the jar—eg, Burdock root, 100 pf vodka, 12/3/2021
  8. Top off the liquid level the next day
  9. Leave your tincture brewing on your counter for six weeks
  10. Strain out the plant material

If you'd like a concise reference guide for making herbal preparations, including tinctures, you’re welcome to grab your free copy of my Wise Woman Medicine Making Chart

Conclusion

Corinna with a rainbow umbrella excited for you download this free guideThe best time to harvest burdock root is after the first hard frost of the year, as plants send their energy and nutrients down to the roots to store over the winter. If you can manage harvesting on or near the dark moon, that can be even more potent!

Remember to locate the roots of first-year growth rather than the second-year plants—otherwise, you’ll be in for a slimy mess.  Burdock roots grow deep so use the trench method I offered in my short video clip.

I always feel that when I make my own medicines or harvest wild foods like burdock, I get double the benefit. The healing starts right out there in the garden . . . happy digging!

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Corinna Woodseasoned teacher and mentor along the Wise Woman path–from herbs to self love

I've been teaching earth-based, woman-centered holistic healing for 30 years. Today, I offer tools to ground you in your own innate wisdom, discernment, and self-understanding. 

I invite you to explore my blog articles, free resources, and online courses—made just for wonderful women like you.
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