RapiTest Soil Test Kit pH/N-P-K

The RapiTest Soil Test Kit measures soil pH plus Nitrogen (N), Phosphorus (P), and Potassium (K), giving quick, lab-free insight into your soil's composition. Knowing your nutrient levels lets you add the right fertilizers and amendments to improve plant health and yields.

At a glance

• Tests: pH, Nitrogen, Phosphorus, and Potassium
• Capsules: 40 total (10 each for pH, N, P, K)
• Comparators: 4 color-coded readers
• Reference: pH preference chart for over 450 plants
• Results: In minutes, no lab required

Best for

• Lawns, gardens, and container plants
• Planning fertilizer and amendment use
• Adjusting soil pH for specific crops
• Beginners and seasoned growers alike
• Regular soil-health monitoring

How to use

Mix a soil sample with water, add the appropriate capsule, shake, and compare the resulting color against the matching comparator. Use the included guidelines and pH chart to decide on amendments and fertilization. Repeat across the season to track soil health over time.

About Grow Organic

Grow Organic, the online home of Peaceful Valley Farm & Garden Supply, has served organic gardeners and small-scale farmers with seeds, tools, and soil amendments from Grass Valley, California since 1976.