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Agrimony Herbs – How To Grow And Care For Burdock

As a medicinal herb, agrimony had a respectable place in different traditional medicines wherever it grew. Not that it’s difficult to grow either. The herb is famous for growing just about anywhere there’s soil and moisture. It can tolerate different growing conditions that normal garden-variety plants cannot survive. 

Agrimonia herbs

Although the herb is not as popular as it used to be, homeopathists rediscovered the healing properties of agrimony, and it’s making a strong comeback. But you don’t have to grow the herb for its medicinal qualities. It is an ornamental plant in its own right, and its low maintenance makes it an ideal addition to your garden. Read more to find out how to grow and care for agrimony. 

All About Agrimony

Agrimony (Agrimonia eupatoria) has many names as befits a plant that was once growing practically in every other home. Some people called it king’s herb, burdock, or church steeples. At one time, it was considered the cure-all for many ailments from indigestion to respiratory diseases. 

A member of the rose family, the hardy herb is planted from the early spring all the way to early fall. This might explain why the plant, which is native to Europe, has spread across the northern hemisphere, and only the icy arctic has proven too inhospitable for it.

The hardy perennial grows to about 4 feet tall, although in the garden, it might not exceed 3 feet tall. It has strong rhizomes from which the stems grow. The leaves are long and narrow and usually dark green. The leaves can reach 8 inches long. Usually, the base leaves are larger than the ones at the top.

Between June and September, small bright yellow flowers open and stay in bloom until they get pollinated.

Although there are over 15 agrimony species in the wild, only one variety has fragrant flowers. It grows in Germany and is known as Agrimonia procera. After pollination, small hooked fruits develop, and they contain the seeds of the plant. When wild animals eat the fruits, they spread the seeds in new pastures where they germinate quickly and start new plants.

Agrimony Uses

Agrimonia uses

Although it mainly serves as an ornamental plant, agrimony was once famous for being able to treat all types of diseases. People simply took the dried leaves and potions made of the herb’s roots as a self-prescribed medicine for everything from the common cold to intestinal worms and gout. Here are some of those common uses of agrimony in the olden as well as modern times.

  • The young leaves of the herb have a slightly less acrimonious taste than the well-developed leaves. You can add them to soups and stews to give them a refreshing taste. Don’t use too much, though since the aroma can be overpowering. 
  • To this day, folk medicine celebrates agrimony and treats it like royalty. It goes into many concoctions, and the roots have a special value despite, or maybe because of, their very unappealing taste.
  • In ancient Greece, agrimony was the king of medicinal herbs. It was used in different types of therapy, including in potions, and sometimes the leaves were rubbed against wounds to heal faster.
  • In the middle ages, the herb was prescribed to treat liver problems and keep the vital organs healthy. 
  • In apothecaries, patients had access to the herb in different forms. It was either boiled in wine to make a potion or soaked in water to make soup. Sometimes, the dry leaves and roots were added as a powder to lard, and the ointment was applied to wounds and bruises.
  • Whenever dysentery swept through Europe like wildfire, agrimony was the only line of defense that people had against the disease. Its effects are in question, though, and there’s no credible report that it healed anyone or prevented the disease.

How to Grow Agrimony

Ornamental or medicinal, agrimony serves many purposes. And although it’s not recommended to use the flowers of the plant for pain relief or treat diarrhea, you’re more than welcome to grow it in the garden to brighten the place and attract pollinators. An easy and guaranteed way to grow the herb is to start it from seeds. Here’s how to do that in easy steps.

  1. Because it has a long growing season, you need to give the herb a headstart in late winter.
  2. Fill a ziplock bag with general-purpose potting mix and water it to make it moist. Place 5 to 8 seeds in the bag and keep it in the fridge for 8 weeks. Don’t let the potting mix go dry until the seeds germinate.
  3. Once the seeds germinate, take them out of the bag and prepare a container for them.
  4. Fill a shallow tray with regular soil and place two seeds in every cell. Cover the seeds with a thin layer of soil. Then water it to get it moist.
  5. Thin out the seedlings as they grow. Remove any crooked or unhealthy seedlings.
  6. Take the tray outdoors gradually and keep it in a sunny spot for the next 4 weeks. At night bring it back indoors until the weather warms up.
  7. About 4 weeks after the last frost and when the air temperature rises above 55 degrees F. you can transplant the seedlings to the garden.
  8. Choose a spot in your garden that gets 6 hours of sun during the growing season. Don’t plant the herb in the shadow of a tree or a building, as it doesn’t thrive in partial shade.
  9. Turn up the top 12 inches of the soil and mix in a good amount of organic materials to improve drainage. 
  10. Dig a hole for each seedling as deep as the root ball of the plant and slightly wider. 
  11. Ease the seedling into the hole so that the soil line aligns with the edge of the hole. Fill back with soil and firm it.
  12. Space the seedlings between 12 to 15 inches apart. While agrimony grows to about 4 feet high, it spreads about one foot across, so spacing the plants is important.

Agrimony Care

Agrimonia care

Once the complicated process of starting agrimony from seeds is over, you can sit back, put your feet up and sip on a cold one as you watch your herb grow. Granted, agrimony tends to take its time to grow which is why you start it early indoors, but once it blooms, the combination of bright yellow flowers and bright green leaves are a sight for sore eyes. 

As a low-maintenance herb, you won’t have to hover over it and keep your hands busy with this perennial. For the most part, you’ll just have to water it regularly, feed it, and fend off the usual pests and diseases.

Soil

After germinating the seeds in the fridge, moving them to a pot or a tray to finish their sprouting, you’re ready to transplant the herb in the garden. Agrimony doesn’t do well as a houseplant because of its height and its need for sunlight. The soil can be either loamy or sandy. Heavy soil retains the water longer than the herb likes, and it hinders root development. Amend the clay soil with coarse sand and add lime to make the soil slightly acidic. You need to bring the soil pH as close to 6.0 or 6.5 as possible. The sand will also improve drainage and loosen the texture of the soil.

Water

The watering patterns and requirements of agrimony are not different from other plants you grow in the garden. One inch of water a week is all the perennial herb. Provide that amount through two or three irrigations every week, depending on how hot the weather is. Water early in the morning before the sun heats up and the soil dries up too fast. Aim the water nozzle low toward the base of the plant, and don’t sprinkle water on the foliage to avoid fungal infections. Keep in mind that that’s the water quota for the growing season in the spring and summer. Cut back on watering during the fall and cut it further during the cold winter months. 

Fertilizer

Apart from the organic materials you mix into the soil before transplanting the agrimony seedlings, you won’t have to fertilize the herb much. This perennial is not a heavy feeder, and thanks to its slow growth rate, it can survive in soil with little nutrients. However, since this is an ornamental plant, you’d want the foliage to be lush green and the flowers bright yellow and abundant. To speed up the growth of the herb, you can feed it with nitrogen-high fertilizer once the roots establish. This will trigger robust foliage growth. In the late spring and before the flower buds emerge, switch to a phosphorus-high fertilizer to promote larger and brighter blooms. Don’t fertilize the herb after the last flower to prepare it for the winter.

Companion Plants

As a herbaceous perennial, agrimony does well alongside other perennials. Because of its height, it should be in the background allowing other smaller perennials to get enough sunlight. Some suitable companion plants that grow nicely with agrimony include lavender, sage, oregano, chives, lovage, thyme, and rosemary. 

Agrimony hardly repels any pests, and it doesn’t confuse any wildlife, so it offers no benefit to the other plants. So growing it alongside vegetables can be counterproductive and has no advantage to the vegetables.

Pests and Diseases

We said that agrimony doesn’t repel pests, but it also doesn’t attract them. Apart from aphids and scale, few other pests pose a serious risk to this herb. You can easily get rid of the tiny pests using neem oil spray or rubbing the burdock leaves and stems with a swab soaked in rubbing alcohol. The only bug that can cause damage to the plant is the blossom midge. It feeds on the petals of the flowers and ruins the blooms completely. The larvae also form galls on the stems, which further damage the ornamental plant. Remove infected flowers and stems to prevent the spread of these pests.

As for diseases, it’s a different matter. The main problems you might have with the perennial include root rot and powdery mildew. Both are caused by overwatering the plant. Poor ventilation and high humidity can also accelerate the spread of powdery mildew. Make sure air circulation is good around the herb and allow the top two inches of soil to dry out between irrigations.

Harvesting Agrimony

Flowers are not the only part of agrimony that you can harvest. The leaves too have many uses, and you can make tea, ointments, and infusions with them. Allow the flowers to open up in the late spring or early summer and start harvesting them by late June or early July. Pick the leaves at the top of the stems as they’re young and don’t have a strong acrimonious taste. 

You can also keep the blooms in a vase where they will stay fresh for weeks at a time. 

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