GrowCheck 4-in-1 Soil pH Test Kit and NPK Soil Tester

Give plants a better start by learning what the soil may need before adding fertilizer. This color-based garden soil testing kitchecks pH, ammonia nitrogen, phosphorus, and potassium. Reagents and a comparison chart provide easy-to-read estimates without batteries or electronic calibration. It is useful for gardeners and growers planning soil amendments or investigating uneven plant growth.

Key Features

• Tests four key soil factors
• pH range from 4.0 to 10.0
• Ammonia nitrogen range: 0–500 mg/L
• Phosphorus and potassium: 0–240 mg/L
• Includes reagents, droppers, test vessels, and chart
• Battery-free color comparison method

Perfect For

Ideal for vegetable gardens, lawns, flowers, houseplants, greenhouses, orchards, farms, raised beds, and checking soil before planting.

How to Use

Mix a representative soil sample with distilled or purified water, shake, and allow the particles to settle. Transfer the clear upper liquid, add the specified reagent, wait for the color to develop, and compare it with the supplied chart.

Care and Safety

Rinse and dry testing tools after use, and keep droppers assigned to their reagents to prevent contamination. Store chemicals sealed in a cool, dark place. Keep away from children, pets, food, skin, and eyes.

Grow with Better Soil Insight

Order GrowCheck today and make gardening decisions with more useful information beneath the surface.