marshmallow plant : Complete Guide and Care Tips

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The Marshmallow Plant: Your Ultimate Guide to Growing and Caring for This Sweet Delight

Are you looking for a unique addition to your garden that not only looks great but can also be used in delicious treats? Look no further than the marshmallow plant! This herbaceous perennial is not only easy to grow, but it can also provide you with the sweet treat we all know and love. In this complete guide, we’ll go over everything you need to know about growing and caring for your very own marshmallow plant.

What is a Marshmallow Plant?


The marshmallow plant, or Althaea officinalis, is a member of the mallow family. It grows up to 4 feet tall and has soft leaves that are covered in fine hairs. In late summer through early fall, it produces beautiful pink or white flowers that resemble hollyhocks.

Marshmallows were originally made from the roots of this plant before being replaced by gelatin in modern recipes. However, the roots of the marshmallow plant still have many medicinal uses such as soothing sore throats and coughs.


Growing Marshmallow Plants

If you want to grow your own marshmallows at home, here’s what you need to know:


Soil Requirements

  • The soil needs to be rich in nutrients with good drainage.
  • A pH between 6-8 is ideal.
  • You can add compost or aged manure before planting if needed.

Sun Requirements

  • Marshmallows prefer full sun but will tolerate partial shade.
  • If grown in too much shade, they may become leggy and produce fewer flowers..



  • Marshmallow plants can be started from seeds or cuttings.
  • If planting from seeds, start indoors 6-8 weeks before the last frost and transplant outside after the danger of frost has passed.
  • If starting from cuttings, take a cutting in early spring and plant in well-draining soil.
  • Plant seedlings or cuttings 2-3 feet apart to allow for proper growth.

Caring for Marshmallow Plants

Marshmallows are relatively low maintenance plants once established. Here are some tips on how to care for them:


  • The soil should be kept moist but not waterlogged.


  • Fertilize with a balanced fertilizer once per month during the growing season (spring-fall).


  • In late fall, cut back stems to ground level and cover with mulch to protect roots over winter.

Note: Marshmallow plants can self-seed easily. If this is not desired, it’s important to remove spent flowers before they go to seed..

The Sweet Reward: Harvesting Marshmallow Root for Treats and Medicinal Purposes

The root of the marshmallow plant is what provides us with the sweet treat we all know and love. However, harvesting marshmallow root does require patience as it takes two years of growth before roots are ready for harvest. Once harvested though, you’ll have plenty of root at your disposal:

To harvest:

    Dig up the roots in early fall of the second year of growth.
    Clean and dry the roots before they can be used for medicinal purposes.
    To use for marshmallows: cut root into small pieces and boil in water until it becomes slimy. Mix with sugar, gelatin, and flavoring to create your own homemade marshmallows.

The Bottom Line

If you’re looking for a unique plant that will bring both beauty and sweetness to your garden, look no further than the marshmallow plant. With its soft leaves, beautiful flowers, and sweet root that can be used to make delicious treats or soothe sore throats, this herbaceous perennial is definitely worth adding to your garden. With proper care during planting and maintenance you’ll have a bountiful supply at your fingertips.

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