Plant Care Cotton Thistle

Cotton Thistle

About Cotton Thistle

Cotton 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 acanthium

Also known as

Cotton Thistle and Scotch thistle

How to care for Cotton Thistle


How often to water your Cotton Thistle

Water needs for Cotton Thistle
0.5 cups
every 9

Cotton 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 Cotton Thistle in your home

Light needs and placement for plant Cotton Thistle: 3ft from a window
3ft or less from
a window

Cotton 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 Cotton Thistle in your home 🏡.


How to fertilize Cotton Thistle

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

Water Needs
Sunlight Needs
Growing Outdoors

Care Summary for Cotton Thistle

Cotton 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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