Sustee Aquameter plant soil moisture sensor set of 5 (White, Medium) — refillable, leave-in indicator

The Sustee Aquameter is a refillable, leave-in soil moisture sensor pen sold in a set of five that shows water needs at a glance without batteries.

Keep houseplants thriving with an unobtrusive moisture indicator designed in Japan and developed with Tokyo University of Agriculture. Each medium-sized Sustee stick fits common 3.5–6 inch pots, changes color to signal wet or dry soil, and can remain in the soil for continuous monitoring — no repeated probing or dirty hands. The set includes five durable, refillable white sticks, each lasting roughly 6–9 months before needing a replacement core.

How does the Sustee Aquameter tell me when to water?

The indicator uses a simple color-change system: white means the soil is dry and blue means the soil is moist. It reacts to different soil types to give a visual cue you can read at a glance without removing it from the pot.

• Color shift: white = needs water, blue = recently watered.
• Works as a leave-in device for continuous monitoring.
• Responsive to potting mixes and typical indoor soils.

Will these medium sticks fit my pots and plants?

Medium Sustee Aquameter sticks measure approximately 7.09 x 0.39 x 0.31 inches and are intended for pots sized about 3.5, 4, 5, and 6 inches. Their slender design suits most small to medium houseplant containers without disturbing roots.

• Dimensions suited to 3.5–6 inch pots.
• Slim profile minimizes root disturbance.
• Leave-in use avoids repeated insertion and removal.

How long do the sticks last and are they maintainable?

Each Sustee stick contains a replaceable core and typically lasts 6–9 months depending on use and soil conditions. When the core is spent, you can refill or swap in a replacement core rather than discarding the entire stick.

• Each stick lifespan: about 6–9 months.
• Refillable replacement core reduces waste and cost.
• Award-winning, maintenance-free outer housing requires no batteries.

Why choose Sustee over other moisture meters?

Sustee combines low-maintenance convenience with a scientific design collaboration from Tokyo University of Agriculture and Japanese manufacturing. The stick is made to stay in the soil, giving continuous, easy-to-read feedback without electronics or routine calibration.

• Made in Japan with university collaboration for improved function.
• No batteries or electronics — simple, reliable operation.
• Set of five sticks provides coverage for multiple plants or staggered replacements.

Who is this for?

The Sustee Aquameter set is ideal for busy indoor gardeners, apartment dwellers, new plant owners, or anyone who prefers a low-effort way to avoid over- or under-watering. It's especially useful for people caring for several small-to-medium potted plants who want consistent, leave-in monitoring without electric meters or frequent manual checks.