A soil potassium tester reads the available potassium (K) in your soil—the nutrient behind hardiness: sturdy stems, disease resistance, and fruit quality. This single-nutrient meter gives you a K reading in seconds, so you can tell whether to add potassium or hold off, without a lab.
Read it as a trend tool. The potassium figure is a directional reference estimated from conductivity, not a lab measurement—useful for spotting when K is running low and checking whether feeding worked. Low potassium can show as weak stems and poor fruit quality.
This tester focuses on potassium. For the other nutrients, see our soil phosphorus tester, or read all three at once with the NPK soil tester. For pH and moisture, browse our soil pH meters.
Yieryi has built pH, EC, and TDS meters for more than ten years. A single-nutrient tester is for trends and timing, not lab-grade numbers, and we say so plainly.
Is the potassium reading lab-accurate?
No—it is a directional reading for tracking trends and timing feeding, not an exact lab figure.
Should I buy single testers or the NPK tester?
Buy a single meter for the nutrient you adjust most often, or the NPK tester to read all three at once.
Where should I insert it?
Into moist soil at root depth; keep it out of stones and never immerse the head in water.
Measures: Available potassium (K) + temperature
Potassium range: 0–1999 mg/kg (directional, estimated)
Temperature range: −30°C to 80°C (−22°F to 176°F)
Model: YG-08
Display: Backlit LCD
Probe: Metal probe, ABS body, measuring depth 3–13.8 cm
Power: 3 × 1.5V LR44 button cell (not included)
How to use it
Where it works best
Gardens, raised beds, containers, orchards, and small farms. Best in normal garden soil; avoid stones and water.
Designed to test potassium from 0–1999 mg/kg with wide temperature monitoring from -30°C to 80°C (-22°F to 176°F), this tester ensures crops resist disease and stress. It solves the issue of fragile plants that wilt quickly under heat or pests. Fruit-bearing plants like tomatoes and peppers perform best when soil potassium levels are around 150–250 mg/kg.
The large LCD with backlight and simple operation make the YG-08 easy to use in various environments. The high-precision probe ensures quick and reliable results across different soil types.
The lightweight design and integrated temperature measurement (in both °C and °F) make the YG-08 a versatile tool for on-the-go use and comprehensive soil analysis.
Quickly measure nitrogen, phosphorus, and potassium levels to ensure plants receive the right balance of nutrients for healthy growth and higher yields.
Crafted with durable materials, this soil tester performs reliably in gardens, farms, and greenhouses, even under tough outdoor conditions.
Featuring a bright LCD screen and simple button operation, the device makes soil testing and watering schedules effortless for beginners and professionals alike.
No, the detector has been calibrated before leaving the factory and can be used directly after receipt to ensure accurate data.
These digital soil testers measure the exact levels of Nitrogen (N), Phosphorus (P), or Potassium (K) in the soil, helping you understand nutrient balance. They solve the common problem of over-fertilizing or nutrient deficiency by giving you accurate data.
Nitrogen is essential for leafy growth and green color. Low nitrogen causes yellow leaves and slow growth. Most vegetables thrive when soil nitrogen is in the range of 40–80 mg/kg.
Phosphorus supports strong root systems and better flowering. Without enough phosphorus, plants struggle to bloom or develop roots. The ideal phosphorus level for most garden plants is 15–30 mg/kg.
Potassium improves plant resistance to drought, pests, and diseases. Fruit and flowering crops like tomatoes and peppers need potassium levels around 150–250 mg/kg for best performance.
Each tester measures nutrients in the range of 0–1999 mg/kg, with built-in temperature sensors covering -30°C to 80°C (-22°F to 176°F), providing precise and reliable results for gardening, greenhouse use, or farming.
