Plant Care Illyrian thistle

Illyrian thistle

About Illyrian thistle

Illyrian thistle is a super rare houseplant 🌿 that needs regular watering to thrive. They do best in abundant sunlight ☀ and should be less than 3 feet from a window.


Onopordum illyricum

Also known as

Illyrian thistle and Illyrian cottonthistle

How to care for Illyrian thistle


How often to water your Illyrian thistle

Water needs for Illyrian thistle
0.5 cups
every 9

Illyrian thistle 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 Illyrian thistle in your home

Light needs and placement for plant Illyrian thistle: 3ft from a window
3ft or less from
a window

Illyrian thistle may have difficulty thriving, and will drop leaves 🍃, without ample sunlight.

Place it less than 3 feet from a south-facing window to maximize the potential for growth.

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


How to fertilize Illyrian thistle

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

Water Needs
Sunlight Needs
Growing Outdoors

Care Summary for Illyrian thistle

Illyrian thistle

Greg recommends:


0.5 cups every 9 days


< 3ft 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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