Plant Care Scarlet Indian paintbrush

Scarlet Indian paintbrush

About Scarlet Indian paintbrush

Scarlet Indian paintbrush is a super rare houseplant 🌿 that is isn’t challenging 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.

Scarlet Indian paintbrush likes soil that is good at retaining moisture.

Scarlet Indian paintbrush belongs to the castilleja genus, and is native to Central Canada to the Eastern United States.


Castilleja coccinea

Also known as

Scarlet Indian paintbrush and scarlet painted-cup

How to care for Scarlet Indian paintbrush


How often to water your Scarlet Indian paintbrush

Water needs for Scarlet Indian paintbrush
0.5 cups
every 9

Scarlet Indian paintbrush needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot located in San Jose, California.

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.

Plant care guide for Scarlet Indian paintbrush in San Jose, California

San Jose, California

54% Low

Growing Scarlet Indian paintbrush in San Jose right now

Light needs for plant Scarlet Indian paintbrush in San Jose, California

Plant growth potential is currently low 📉

November 26th, 2021

Sunlight intensity as measured by “net radiation” in San Jose is currently low 📉.

The availability of high quality sunlight in your home impacts ability for plants to thrive and is key in determin…

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Light needs for plant Scarlet Indian paintbrush in San Jose, California

Sunlight intensity will decrease by 27.4% ☀️

November 27th, 2021

San Jose is trending towards lower sunlight intensity!

The amount of sunlight in San Jose is expected to decrease by 27.4% over the next 2 weeks to an average of 8.7 megajoules of energy per m2 pe…

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Light needs for plant Scarlet Indian paintbrush in San Jose, California

Daylight will decrease by 1.1 hours 📉

November 27th, 2021

This month, San Jose is getting an average of 10.2 hours of clear sky sunlight per day.

Hours of daylight will decrease by 10.3% over the next two weeks. Your plants will get 9.5 total hours of da…

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Finding light for Scarlet Indian paintbrush in your home

Light needs and placement for plant Scarlet Indian paintbrush: 1ft from a window
1ft or less from
a window

Scarlet Indian paintbrush love being close to bright, sunny windows 😎.

Place it less than 1ft from a south-facing window to ensure it receives enough light to survive during this time of reduced sunlight intensity in San Jose, California ⛅.

Scarlet Indian paintbrush does not tolerate low-light 🚫.


How to fertilize Scarlet Indian paintbrush

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

When to repot Scarlet Indian paintbrush

Nutrient needs for plant Scarlet Indian paintbrush in San Jose, California

Is this a good time of year to repot? No ⏳

November 27th, 2021

The growing potential in San Jose is low 📉.

Repotting in late fall or winter when the day lengths are shorter can be very stressful for a plant and cause it to go into shock.

It's best to repo…

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Difficulty Level

Scarlet Indian paintbrush is generally easy to care for, though some plant parents report facing challenges with growing it. Check out the reviews down below to read more about their experiences!

Water Needs
Sunlight Needs
Growth Pattern
Growing Outdoors

Care Summary for Scarlet Indian paintbrush

Scarlet Indian paintbrush

Greg recommends:


0.5 cups every 9 days


< 1ft from a window


Repot after 2x growth

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

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