Plant Care Oriental lady's thumb

Oriental lady's thumb

About Oriental lady's thumb

Oriental lady's thumb 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.

Oriental lady's thumb likes soil that is good at retaining moisture. Your plant shouldn't need added fertilizers if you repot each time it doubles in size.


Persicaria longiseta

Also known as

Oriental lady's thumb, bristly lady's thumb, Asiatic smartweed, long-bristled smartweed, low smartweed, Asiatic waterpepper, bristled knotweed, bunchy knotweed and tufted knotweed

How to care for Oriental lady's thumb


How often to water your Oriental lady's thumb

Water needs for Oriental lady's thumb
0.5 cups
every 9

Oriental lady's thumb 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 Oriental lady's thumb

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 Oriental lady's thumb in your home

Light needs and placement for plant Oriental lady's thumb: 1ft from a window
1ft or less from
a window

Oriental lady's thumb love being close to bright, sunny windows 😎.

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

Oriental lady's thumb does not tolerate low-light 🚫.

Select your region to see how the current weather in your area affects the placement of Oriental lady's thumb in your home 🏡.


How to fertilize Oriental lady's thumb

Nutrient, fertilizer, and repotting needs for Oriental lady's thumb: 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 Oriental lady's thumb after it doubles in size or once a year—whichever comes first.

Water Needs
Sunlight Needs

Care Summary for Oriental lady's thumb

Oriental lady's thumb

Oriental lady's thumb

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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