• Two potted plants with the Sustee water meters inside them, indicating moisture levels. The plants have green leaves, and the meters are blue, suggesting they have enough water.
  • Sustee water meter device
  • This device makes watering your indoor plants easy. Water and the moisture monitor turns blue. Water when it turns white.
  • Sustee for indoor plants comes in three sizes to suit whatever size pot you have. Set and forget.
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Sustee

Sustee Medium Plant Moisture Indicator – Watering Checker for Pots (12–18cm)

Sustee Medium Plant Moisture Indicator – Watering Checker for Pots (12–18cm)

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$16.95 AUD
$16.95 AUD
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Water your plants with confidence.

Sustee is the easy-to-use moisture sensor that tells you exactly when it’s time to water — no guesswork, no stress.

Simply insert it into the potting mix (ideal for pots 12–18cm wide) and check the indicator:
💧 Blue = moist
⚪ White = time to water

Made in Japan and trusted by plant lovers worldwide, the Medium Sustee checks moisture right at the root level — where it matters most. It won’t disturb roots, and it responds in just 10- 20 minutes.

Why it’s a plant care essential:
– Perfect for medium-sized pots
– Prevents overwatering & underwatering
– Clean, reusable, and mess-free

Healthy plants start with better watering.
Sustee makes it simple.

 

 


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    Everything You Need to Know

    How does Sustee work?

    Sustee measures moisture at root level and changes colour to indicate when it's time to water. Blue means there is still sufficient moisture in the soil. White means it's time to water your plant.

    What plants can I use Sustee with?

    Sustee works with most indoor plants, tropical plants, flowering plants and outdoor potted plants including Monstera, Peace Lily, Fiddle Leaf Fig, Philodendron, Pothos, Rubber Plants, Orchids and many more.

    What size Sustee do I need?

    Choose your Sustee based on pot size:

    • Small: pots up to 12 cm
    • Medium: pots 12-18 cm
    • Large: pots 18-25 cm

    How long does a Sustee last?

    A Sustee moisture meter core typically lasts 6 to 12 months with regular use. The Sustee stick is reusable, but the inner cotton core is 100% natural and breaks down over time.

    Does Sustee work in all potting mixes?

    Yes. Sustee works well in most potting mixes, soil blends, bark mixes, coco peat, coco coir, akadama and sphagnum moss.

    Sustee does not work in:

    • Pure hydroponic systems (water only)
    • Pure LECA
    • Pure perlite or pumice
    • Pure sand

    If you're using a chunky aroid mix or a mix containing a high percentage of LECA, perlite or bark, ensure the Sustee wick is surrounded by some moisture-retentive material such as potting mix or coco coir so it can accurately detect moisture.

    Tip: Sustee works best when inserted into the main root zone where moisture is retained the longest.

    Do I need batteries or an app?

    No. Sustee requires no batteries, charging, electronics or apps. Simply insert it into the soil and monitor the colour indicator.

    Can I use Sustee outdoors?

    Yes, Sustee can be used in outdoor potted plants. Performance may vary in extreme weather conditions.

    Why is Sustee better than a moisture meter?

    Unlike traditional moisture meters that need to be inserted each time you check your soil, Sustee stays in the pot and continuously indicates when your plant needs water.