Plant Care Common Soapwort

Common Soapwort

About Common Soapwort

Soapwort is native to Europe. It is an upright perennial with pink, rose or white clusters of flowers. Soapworts get their name because they contain saponins in the plant sap which lathers when used for washing. The plants are often seen growing along roadsides, waste places, and railroad tracks.


Saponaria officinalis

Also known as

Sweet Betty, Sweet Betty, Soapwort, Common soapwort, Bouncing-bet, Crow soap, Wild sweet william and Soapweed

How to care for Common Soapwort

💦 Water

How often to water your Common Soapwort

Water needs for Common Soapwort
0.5 cups
every 9

Common Soapwort needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot.

Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.

Calculate water needs of Common Soapwort

Water 0.5 cups every

Does your plant get direct sunlight?

Select the pot size

☀️ Light

Finding light for Sweet Betty in your home

Light needs and placement for plant Common Soapwort: 1ft from a window
1ft or less from
a window

Common Soapwort love being close to bright, sunny windows 😎.

Place it less than 1ft from a south-facing window to maximize the potential for growth.

Common Soapwort does not tolerate low-light 🚫.

Select your region to see how the current weather in your area affects the placement of Common Soapwort in your home 🏡.

🪴 Nutrients

How to fertilize Common Soapwort

Nutrient, fertilizer, and repotting needs for Common Soapwort: repot after 2X growth

Most potting soils come with ample nutrients which plants use to produce new growth.

By the time your plant has depleted the nutrients in its soil it’s likely grown enough to need a larger pot anyway.

To replenish this plant's nutrients, repot your Common Soapwort after it doubles in size or once a year—whichever comes first.

💡 FAQs
⭐ Difficulty Level

Common Soapwort is generally considered an easy-to-care-for plant and makes a great choice for beginners!

Benefits of Growing Sweet Betty →

Common Sweet Betty Problems →

💦 Water Needs

Common Soapwort prefers for the soil to dry out between waterings and should be watered regularly. Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.

Sweet Betty Water Frequency →

Sweet Betty Root Rot →

☀️ Sunlight Needs

Common Soapwort requires abundant, bright and direct light. Place it less than one foot from a window to ensure it receives enough light to survive 💪. Select your region to see how the current weather in your area affects the placement in your home 🏡.

Sweet Betty Light Requirements →

Sweet Betty Direct Sunlight Needs & Tolerance →

🐶 🐈 👶 Toxicity

Common Soapwort is not safe to consume. If you, a family member, or a pet has ingested any amount of plant material contact Poison Control, US (800) 222-1222, or your veterinarian. If you have children, cats, or dogs in the home, we suggest keeping this plant out of reach.

Sweet Betty Toxicity to Cats →

Sweet Betty Toxicity to Dogs →

Sweet Betty Toxicity to Humans →

🪴 Soil

Common Soapwort does best in well-draining soil. A good soil will contain lots of organic matter such as coco coir as well as perlite or vermiculite to help with drainage. Adding a handful of perlite to regular store-bought potting soil should do the trick!

Best Soil Mix for Sweet Betty →

When and How to Successfully Repot Sweet Betty →

💩 Fertilizer

Common Soapwort should be repotted after it doubles in size or once a year, whichever comes first. Fresh potting soil has all the nutrients your plant needs, so as long as it’s refreshed yearly, you shouldn’t need to use fertilizer. Remember, plants get their energy from sunlight, not fertilizer!

How Much and When to Fertilize Sweet Betty →

⬆️ ⬇️ Growth Pattern

Common Soapwort grows vertically and new growth will emerge from the top of the plant.

How and When to Prune Sweet Betty →

🌦️ Growing Outdoors

USDA Hardiness Zone
Common Soapwort can be grown outdoors in USDA Hardiness Zones 2a-8b. Find your local hardiness zone here.

Sweet Betty Temperature Tolerance →

🌱 Propagation

Common Soapwort can be propagated by division into new individual plants.

  • Check to see if there is more than one plant. In some cases they may still be beneath the soil surface. If you feel confident, you may remove the soil to check for baby plantlets below!
  • If there are multiple plants growing, unpot the plant and gently tug the plants apart, being careful not to disturb too many of the roots. They may be connected by large root segments which you may need to break to free the plantlet.
  • Pot up the new plant in well-draining soil
  • Repot the parent plant back into its original pot

How to Propagate Sweet Betty →

🧐 Troubleshooting

When troubleshooting a sad-looking houseplant, start by checking for signs of distress in its leaves, such as yellowing, browning, or drooping, which can indicate overwatering or nutrient deficiencies.

Inspect the soil moisture; too dry or too wet soil can cause problems.

Ensure the plant is getting the right amount of light, as too much or too little can stress it.

Finally, consider environmental factors like temperature and humidity, and adjust care routines accordingly to revive your plant.

Care Summary for Common Soapwort

Common Soapwort

Common Soapwort

Greg recommends:


0.5 cups every 9 days


< 1ft from a window


Repot after 2x growth

Based on the 4” pot your plant is in, and that it doesn’t get direct sunlight.

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