Plant Care giant crepe-myrtle

giant crepe-myrtle

About giant crepe-myrtle

Giant Crape Myrtle is a flowering deciduous tree with large bright pink to light purple flowers.


Lagerstroemia speciosa

Also known as

giant crepe-myrtle, Queen's crepe-myrtle, banabá plant and pride of India

How to care for giant crepe-myrtle


How often to water your giant crepe-myrtle

Water needs for giant crepe-myrtle
0.5 cups
every 9

giant crepe-myrtle needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot located in Boise, Idaho.

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 crepe-myrtle

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 giant crepe-myrtle in Boise, Idaho

Boise, Idaho

38% Low

Growing giant crepe-myrtle in Boise right now

Light needs for plant giant crepe-myrtle in Boise, Idaho

Plant growth potential is currently very low 📉

December 8th, 2021

Sunlight intensity as measured by “net radiation” in Boise is currently very low 📉.

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

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Light needs for plant giant crepe-myrtle in Boise, Idaho

Sunlight intensity will decrease by 26.8% ☀️

December 8th, 2021

Boise is trending towards lower sunlight intensity!

The amount of sunlight in Boise is expected to decrease by 26.8% over the next 2 weeks to an average of 6.2 megajoules of energy per m2 per day!…

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Light needs for plant giant crepe-myrtle in Boise, Idaho

Daylight will decrease by 1.1 hours 📉

December 7th, 2021

This month, Boise is getting an average of 9.1 hours of clear sky sunlight per day.

Hours of daylight will decrease by 10.9% over the next two weeks. Your plants will get 8.7 total hours of daylig…

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Finding light for giant crepe-myrtle in your home

Light needs and placement for plant giant crepe-myrtle: 1ft from a window
1ft or less from
a window

giant crepe-myrtle 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 Boise, Idaho ⛅.

giant crepe-myrtle does not tolerate low-light 🚫.


How to fertilize giant crepe-myrtle

Nutrient, fertilizer, and repotting needs for giant crepe-myrtle: 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 crepe-myrtle after it doubles in size or once a year—whichever comes first.

Water Needs
Sunlight Needs
Growth Pattern
Growing Outdoors

Care Summary for giant crepe-myrtle

giant crepe-myrtle

giant crepe-myrtle

Greg recommends:


0.5 cups every 9 days


< 1ft from a window


Repot after 2x growth

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

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