Sustee Aquameters

SUSTEE AQUAMETER – Medium Refillable

$11.00 /Each

Have a green thumb, not a dirty finger! You know it's time to water when the color changes from blue to white. Because you leave Sustee in place, it does not disturb growing roots. Sustee's award-wining product design complements the appearance of your plants and is available in white and green.

  • Senses water at root level, avoid the dirty fingers & damaged roots you get when trying feel for soil wetness
  • Sustee remains in the pot to continuously monitor soil humidity and show you when to water
  • Helps prevent withering & root rot - your houseplants stay healthy so they can clean the indoor air to keep you healthy!
  • Award-winning product design - No batteries - Environmentally friendly - Creates little waste
  • Sustee size M is best for pots 4.7 to 7 inches in diameter
  • Get one for each of your plants and more for gifts

SUSTEE AQUAMETER – Large Refillable

$12.00 /Each

  • Sustee size L is best for pots more than 7 inches in diameter

SUSTEE AQUAMETER – Small Refillable 2-Pack

$16.00 /Pack of 2

  • Sustee size S is best for small or shallow pots with plant roots about 2 inches deep
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  • A white indicator means it is time to water your plant.
  • After watering, Sustee absorbs moisture at root level, like your plant.
  • As the level of absorbed water rises, the indicator gradually becomes blue.
  • It takes about 10 minutes to turn completely blue after watering, but the time varies by the type of soil.
  • Sustee’s refillable/replaceable cores have a life of about 6-9 months, depending on the type of soil. MB HANA will offer core refills as soon as they are available from the manufacturer and before you need to replace yours (around September 2018).


Sustee’s patented technology measures the relation between soil moisture suction and soil moisture content, using the soil moisture retention (pF) curve. Like a plant, it absorbs water from the soil and allows it to evaporate through transpiration holes near the display window. Sustee was tested during development and proven effective by professional growers of orchids, roses and begonias.

The pF curve between 1.7 and 2.3 is the most effective water moisture level for plants. Below 1.7 root rot is likely and above 2.3 the plant starts to dry out and send roots deeper to find water. Sustee is designed to gradually turn white as the soil approaches a level of 2.3, showing you when the plant really needs water to support healthy root development and helping you to avoid watering too frequently.


  • You can choose green or white Sustees to complement the natural colors of your plants.
  • Use the Small size for shallow or small pots with plant roots about 2 inches deep.
  • Use the Medium size for pots from 4.7 to 7 inches in diameter.
  • Use the Large size for a deeper pot with a diameter greater than 7 inches.
Green and White Refillable Sustee Aquameters in 3 sizess


Sustee is made in Japan and has won international awards
for excellence in quality and design.

Product design is by Tetsutaro Nakabayashi, Tokyo.

2014 - Reddot Design Award - Germany
2014 - Design for Asia Award - Hongkong
2015 - Good Design Award - Japan
JIDA Design Museum Selection Vol. 16 - Japan