SUS tee Aquameter (Set of 2), Watering Checker for Plants, Helps Watering Plants Correctly, Simple to Use, Prevents Plant Wilting, No Batteries Needed, 100% Made in Japan (Small, Green) by Amazon.co.uk

Price last update: 12/06/2025

Description

Did you know that 80% of plant withering is caused by improper watering?
Statements like "thoroughly once per week" or "when surface of potting soil is dry" are by no means absolute indications on when to water, but approximations. When the right time to water a plant has come depends on many factors like temperature, moisture, amount of sunlight and plant size.
SUStee is a watering indicator for home use which is based on pF value, which means it works perfectly with all types of plants and in all kinds of soil.
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HOW TO USE SUSTEE
White - needs watering, Blue - enough water
Leave SUStee in the pot to continuously monitor soil humidity & show you when to water your plant.
HOW TO USE SUSTEE
Insert it into the soil
The bottom opening must be completely covered in soil & the upper opening must stay out of the soil.
HOW TO USE SUSTEE
Water generously at first use
You can also put SUStee into a cup of water, wait for it to turn blue & then insert it into the pot.
1
1. Set
2
2. Water
3
3. Monitor
All you need to know about SUStee
SUStee works with all kinds of plants
How SUStee actually works
Many people mistakenly believe that there are different watering frequencies for different plants. Watering timing varies depending on the environment (temperature, humidity, season, the growth status of a plant, etc.)
not the type of plant.
There is a beneficial soil moisture range shared by all plants. It is called available water capacity and can be rated using what is academically called pF value. SUStee is a watering checker with a pF value indicator for your home!
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SUStee is suitable for all kinds of soils
Soil types
SUStee is based on the so called pF-value ("potential Force"), which means that it does not tell you if there is water in the soil or not, but it actually measures the ability of the plant's roots to extract water from the soil. Therefore SUStee can be used in most soil bases:
Organic & Inorganic Soil
Bark
Bog & Peat Moss and even Hydroculture.
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Choose the right SUStee for your plant
Size and Colour
SUStee is available in 2 colours: GREEN and WHITE and in 3 different sizes: S, M and L. Choose the size of your SUStee according to the diameter of you pot:
Size S for pots with diameter <3.5in (<9cm)
Size M for pots with diameter between 3.5in and 7.1in (between 9cm and 18cm)
Size L for pots with diameter >7.1in (>18cm)
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How much to water and when will the colour change
First time use
When using SUStee for the first time insert it into the pot between the arrow markers and water your plant generously. Water should drip out onto the saucer, which you should later empty to avoid overflow. SUStee will start turning blue in a matter of minutes, depending on the size. The average time it takes for each size to turn blue:
Size S - 3 min
Size M - 5 min
Size L - 25 min
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When should you water your plant again
Watering
The time for watering your plant has come when the little window on SUStees top has turned completely white.
Blue the soil is adequately hydrated.
White the soil is dry and watering is required.
We do not recommend watering if SUStee shows the slightest hint of blue. The change of colour will alter with the seasons: in hot summers water will evaporate much quicker, leading SUStee to turn white faster, in winter, water will evaporate slower and SUStee will stay blue for longer.
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5-piece pack (-10%)
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Price
£19.40
£
19.
40
£19.40
£
19.
40
£24.30
£
24.
30
£24.30
£
24.
30
£29.20
£
29.
20
£29.20
£
29.
20
Size
Small
Small
Medium
Medium
Large
Large
Pot diameter
< 9cm
< 9cm
9cm - 18cm
9cm - 18cm
> 18cm
> 18cm
Dimensions
10mm x 8mm x 120mm
10mm x 8mm x 120mm
10mm x 8mm x 180mm
10mm x 8mm x 180mm
10mm x 8mm x 225mm
10mm x 8mm x 225mm
Weight
5 x 4.3g
5 x 4.3g
5 x 5.9g
5 x 5.9g
5 x 8.0g
5 x 8.0g
Colour
Green
White
Green
White
Green
White
How to maintain SUStee
Water sprayers, rain, fertilisers and pesticides?
Other frequently asked questions
1. Is SUStee affected by water sprayers or rain?
No. SUStee registers the amount of water in the soil. If SUStee gets wet and changes its colour to blue, it will turn white again, as soon as the soil is dry.
2. Is SUStee affected by mineral or organic fertiliser or influenced by pesticides?
If not overused and with low oil content, SUStee will not be affected by fertilisers or pesticides.
What to do if SUStee does not turn blue or white?
Troubleshooting
If your SUStee is not turning blue or white try one of these measures:
Not turning blue: try watering more, especially the first time you use it.
Not turning white: it is possible that SUStee cannot breathe. Try loosening the soil in the pot before watering again or insert SUStee into a new spot.
Not changing colour: SUStee's core may be clogged - try washing your SUStee. It is also possible that SUStee's inner core was damaged by bacterias or bugs in the soil - replace the core with a new one.
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How to take care of your SUStee
Cleaning process
After long periods of use SUStee might not react as swiftly as it should. This may be due to soil sticking to it.
What to do:
Mix neutral detergent with warm water and place SUStee upside down (the window facing downwards) and let it soak for about an hour. Whatever is sticking to SUStee should come off and dissolve this way. After cleaning let SUStee dry till it shows white. Now you can reuse it.
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After 6-24 months the inner core should be changed
Replacing the inner core
SUStee's inner core is 100% natural, made of non-woven cotton and will be consumed by microorganisms over time. The core has to be replaced when it stops changing colour (approx. after 6-24 months).
How do you know when to replace the inner core?
Take SUStee out of the soil and verify the opening at the bottom. If the inner core has decomposed, it is time to replace it with a new one.
The inner core should be replaced when the device stops reacting, even if it is not entirely gone.
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SUStee is sustainable - Buy Refills (in set of 2)
Suitable for SUStee size:
Small
Suitable for SUStee size:
Medium
Suitable for SUStee size:
Large
Lenght:
120mm
Lenght:
180mm
Lenght:
225mm

Product information

    • Package Dimensions:13.2 x 3.8 x 0.1 cm; 20 Grams
    • Material type:Polycarbonate
    • Manufacturer:Cabinotier Co. Ltd.
    • ASIN:B088NT8KR5

    Related products to SUS tee Aquameter (Set of 2), Watering Checker for Plants, Helps Watering Plants Correctly, Simple to Use, Prevents Plant Wilting, No Batteries Needed, 100% Made in Japan (Small, Green):

    SUS tee Aquameter (Set of 2), Watering Checker for Plants, Helps Watering Plants Correctly, Simple to Use, Prevents Plant Wilting, No Batteries Needed, 100% Made in Japan (Small, Green)
    SUS tee Aquameter (Set of 2), Watering Checker for Plants, Helps Watering Plants Correctly, Simple to Use, Prevents Plant Wilting, No Batteries Needed, 100% Made in Japan (Small, Green) by Amazon.co.uk
    Price last update: 12/06/2025