Plant Care Giant Red Paintbrush

Giant Red Paintbrush

About Giant Red Paintbrush

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

Giant Red Paintbrush likes soil that is good at retaining moisture.


Castilleja miniata

How to care for Giant Red Paintbrush


How often to water your Giant Red Paintbrush

Water needs for Giant Red Paintbrush
0.5 cups
every 9

Giant Red Paintbrush 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 Giant Red Paintbrush

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 Giant Red Paintbrush in your home

Light needs and placement for plant Giant Red Paintbrush: 1ft from a window
1ft or less from
a window

Giant Red Paintbrush love being close to bright, sunny windows 😎.

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

Giant Red Paintbrush does not tolerate low-light 🚫.

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


How to fertilize Giant Red Paintbrush

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

Water Needs
Sunlight Needs
Growth Pattern

Care Summary for Giant Red Paintbrush

Giant Red Paintbrush

Giant Red Paintbrush

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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