Plant Care Costmary


About Costmary

Costmary is a super rare houseplant 🌿 that is easy to grow and needs regular watering to thrive. They do best in long-lasting, direct light ☀️ and should be less than 1 foot from a window.

Costmary likes soil that is well draining. Your plant shouldn't need added fertilizers if you repot each time it doubles in size.

Costmary belongs to the Tanacetum genus, and is native to Southern Europe and Western Asia.


Tanacetum balsamita

How to care for Costmary


How often to water your Costmary

Water needs for Costmary
0.5 cups
every 9

Costmary 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.

Water 0.5 cups every

Does your plant get direct sunlight?

Select the pot size


Check the growing potential in your area

A plant's growing potential is determined from its location, the time of year, and current local weather.

Select a city to check sunlight intensity

Finding light for Costmary in your home

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

Costmary love being close to bright, sunny windows 😎.

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

Costmary does not tolerate low-light 🚫.

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


How to fertilize Costmary

Nutrient, fertilizer, and repotting needs for Costmary: 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 Costmary after it doubles in size or once a year—whichever comes first.

Difficulty Level

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

Water Needs
Sunlight Needs
Growth Pattern
Growing Outdoors

Care Summary for Costmary



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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