Plants

Guide to Solomon’s Seal: How to Grow & Care for “Polygonatum”

Read our guide to Polygonatum for everything you will ever need to know! Tips for growing & caring for “Solomon’s Seal” plants
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Polygonatum, commonly referred to as Solomon’s Seal or King Solomon’s-seal, is a genus of woodland flowering plants in the Asparagaceae family. Solomon’s Seal plants are native to temperate regions of the Northern Hemisphere like Asia, Europe, and North America.

The genus’ scientific name comes from the ancient Greek where it means “many knees”, describing the multiple jointed rhizomes of Polygonatum plants. There are about 74 species and hybrids included in the Polygonatum genus but only some of them are used as ornamental plants,(P. Biflorum or Multiforum, P. Verticillatum, P. Humile, P. Odoratum, and others).

Solomon’s Seal plants are used in traditional medicine to treat fever, allergy, pain, or inflammation. In 1930, a pharmacologist named Hedwin Langecker discovered that Polygonatum plants can be effective in the treatment of diabetes.

About Solomon’s Seal

  • There is a herbal remedy in traditional Chinese medicine made from a mix of Polygonatum species. It is used to enhance the function of various organs and to restore mental vitality.
  • Solomon’s Seal plants are low-maintenance herbaceous perennials that thrive when grown in places with partial shade to high shade. They are drought-tolerant, so they can survive drought and the occasional exposure to direct sunlight.
  • If you want to keep your Polygonatum plants happy, make sure you keep their potting soil evenly moist. They need some time to establish in a new growing environment, so constant watering may be needed for a while.
  • They benefit from a cool, damp, and well-draining potting mix that is rich in organic matter. The best choice for these plants would be slightly acidic soil.
  • Plant your new Solomon’s Seal during spring or fall. These plants are relatively slow-growing perennials that can be grown from seeds, but this process might take up to three years.
  • You can also grow them from rhizomes that do well when planted in a shady place.
  • Polygonatum plants love to grow in plenty of organic matter, so you should feed them once every year with compost or organic fertilizer.
  • Although they are used as food in some regions, Solomon’s Seal plants are very toxic to pets and dogs. Their berries are the most poisonous part, so consuming them may cause digestive problems.
  • Solomon’s Seal plants can form a symbiotic relationship with Hosta, Columbine, British Ferns, Bleeding Hearts, and any species of Viola plants.
Solomon's Seal
Solomon’s Seal

Solomon’s Seal Features: An Overview

  • In China, certain Polygonatum species have been used as food for a long time. Their rhizomes, leaves, and stems can be served raw or cooked as a side dish. Also, species like P. Cirrifolium and P. Verticillatum are used in India as leafy vegetables.
  • Their rhizomes are very popular in China, where they are commonly used for making tea and snacks, flavoring wine and liquor, supplementing food staples, and eating during festivals.
  • The variegated and green species of Solomon’s Seal plants are considered True Solomon’s Seal. They are used in Chinese herbalism and known as “yellow essence”.
  • Depending on the species, these plants can grow between 6 and 7 feet (1.8-2.1 m) tall when they reach maturity. However, some species can measure up to only several inches. The tallest species of Polygonatum plants is P. Biflorum Commutatum.
  • Although Solomon’s Seal species are distributed in many regions around the world, they have some common attributes such as their slender bending stems and delicate, bell-like flowers.
  • Polygonatum plants have smooth, shiny, lance-shaped, green leaves that turn into a saturated golden yellow in the autumn. They can bring a spectacular dash of color in every garden or home.
  • During the spring season, from April to June, they produce white, pink, or green flowers. In late summer, purple-blue to black berrieswill take the bloomings’ place. Also, there is a species that can bear red fruits and is commonly referred to as the False Solomon’s Seal (Maianthemum Racemosum).
  • When frost occurs, Solomon’s Seal plants die to the ground and remain dormant until the next growing season.
Polygonatum
Polygonatum Plant

Growing Solomon’s Seal

Solomon’s Seal plants grow mostly in the dappled shade of tall trees. When growing them in your garden, you should plant them in a spot that ensures partial to full shade. Indoors, place them near a window or in a dark corner, as they prefer low light conditions. Depending on the climate of the region you live in, their preferences may vary. In cool climates, they can tolerate more sunlight than they do in warmer ones.

Due to the high variety of species, these plants can adapt and thrive in almost any climate. While they are used to their native habitat conditions of cool temperatures and slightly humid environments, some species of Polygonatum plants can still grow in hot and dry regions if you help them through.

The great majority of Solomon’s Seal plants, except Polygonatum Humile, are very adaptable to other climates. Make sure you provide them with enough shade, soil moisture, and protect them from strong winds. Also, you can add a thin layer of mulch to maintain their roots cool.

When first planting a Polygonatum plant, you can create a mix of natural garden soil and compost. These plants enjoy high quantities of organic matter, so this planting mix will give them a proper start. They grow at a pretty slow pace, so you can feed your plant at the beginning of the growing season with organic fertilizer or compost once a year to boost its growth.

Solomon's Seal Plant
Solomon’s Seal Plant

Both indoors and outdoors, Solomon-s Seal should be planted in a soil mix that is organic, slightly acidic, and has good drainage properties. If you are growing Solomon’s Seal plants indoors, it’s best to use large containers.

Usually, if the environmental conditions are optimal, Solomon’s seal plants are not affected by diseases or pests. When the humidity levels are very high, you might notice some discoloration on the leaves. This is usually a sign of fungal diseases. The most common pests that affect Solomon’s Seal plants are snails and sawfly slugs. If your plant is infested, their leaves or stems will have tiny holes. You can treat them using a caterpillar spray or a pyrethrum insecticide.

Solomon’s Seal plants produce small flowers that drop off naturally when they are spent. During their growing season, their leaves remain healthy, but the stems can fall off the plant in the cooler temperatures of the fall and winter seasons. Due to their natural ability to constantly keep themselves looking fresh, these plants do not require any extra pruning.

Watering Solomon’s Seal

Solomon’s Seal plants enjoy a slightly damp soil. However, make sure you do not let them grow in soggy conditions, as this may result in root rot. Young Solomon’s Seal plants need more frequent watering than mature ones.

They are tolerant of short periods of drought, but not when they are first planted. While Polygonatum plants are getting used to their new environment, you need to provide them with plenty of water. Once they have settled in, they will be pretty forgiving to neglect, as their rhizomes store large quantities of water to survive.

If Solomon’s Seal plants experience long periods of drought, they will benefit from extra watering. Established plants prefer low levels of humidity similar to those in their natural habitat.

Growing in a garden border
Growing in a garden border

Propagating Solomon’s Seal

Polygonatum plants can be easily grown from seeds, but the most efficient way to propagate them is by division once every three years. The rhizomes can be divided in early spring, as this is the moment right before their growing season starts. If you are not a big fan of their yellow foliage, you can also propagate these plants in the fall.

Depending on your preferences, you can move the existing clumps into another place or cut larger rhizomes into several pieces. This will result in multiple Solomon’s Seal plants.

Dig the soil and use a sharp knife or spade to divide the clumps. Once this process is complete, you can safely replant the rhizome divisions in damp, well-draining, and rich in an organic matter soil mix. The rhizomes should be placed horizontally, a few inches deep in the soil. Make sure you place them in a spot that provides them with partial shade and water them regularly to maintain the soil damp. They are slow-growing plants, so it may take some time before you notice new growth.

In Conclusion

If you are looking for low-maintenance flowering plants, we have good news. Most types of Salmon’s Seal are easy-to-grow and to propagate. They are very popular ornamental houseplants, exhibiting their colored, bell-shaped bloomings in many gardens and homes from all over the world.

Salmon’s Seal plants naturally grow in the forests of temperate regions and have no high demands regarding their environment. They will grow happy and healthy as long as you plant them in well-draining, organic soil, choose a spot where they can receive proper light and humidity, and provide them with grow-boost fertilizers and regular watering.

Once their flowers have ended their blooming, tiny fruits will take their place. The berries of some species are edible for humans, so you can look for a traditional Chinese recipe if you are interested in adding some extra flavor to your daily meals. But keep in mind that Solomon’s Seal plants can be toxic to pets.

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Miruna Secuianu

Miruna is an experienced content writer with a passion for gardening. She is the proud owner of an outdoor rose garden and an indoor collection of tiny succulents. She bought her first succulent 10 years ago - an adorable Echeveria Setosa. Now she owns more than 100 succulents and cacti of different colors, shapes, and sizes. Miruna is a versatile writer and, as you might have guessed, her favorite topic is gardening. Contact miruna@gardenbeast.com

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