Plant Care Formosa firethorn

Formosa firethorn

About Formosa firethorn

Formosa pyracantha is a medium evergreen shrub that grows up to 18' and is upright, stiff, and thorny. It blooms in late spring to early summer and has showy but extremely foetid flowers. The orange-red berries mature in fall and persist through winter. It has sharp thorns and requires pruning to look manucured. It is tolerant of partial shade, hot and dry conditions and pH between 5.5 and 7.5.


Pyracantha koidzumii

Also known as

Formosa firethorn and Taiwan firethorn

How to care for Formosa firethorn


How often to water your Formosa firethorn

Water needs for Formosa firethorn
0.5 cups
every 9

Formosa firethorn 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 Formosa firethorn in your home

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

Formosa firethorn love being close to bright, sunny windows 😎.

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

Formosa firethorn does not tolerate low-light 🚫.

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


How to fertilize Formosa firethorn

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

Water Needs
Sunlight Needs
Growth Pattern
Growing Outdoors

Care Summary for Formosa firethorn

Formosa firethorn

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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