Is this kit for a one-and-done test? If so, where and how much are refills for this product?

This test has several capsules for each test you want to run. My soil was really depleted. So I tested the first time to see what it needed, and then added those nutrients, and a week later tested again. I used the recommendations on the instructions to "fix" the soil, and it worked really well. The kit is easy to us. Read the FULL INSTRUCTIONS on the inside. The short version does not work. It will take a few hours or even days for some, because you have to put the soil in "purified" water, and let the soil settle to the bottom and the liquid become as clear as possible. I bought these on Amazon and if I remember right paid less than $10 for the complete kit. It was cheaper that way. I love these tests. Hope this was helpful.

can you use it for several seasons.. or do the chemicals go bad once opened to the air?

The chemicals are in capsules. I used mine throughout the season last year on multiple foot plots around our property. Each variety of capsule is in its own sealable baggie also. You should be good as long as you keep them away from open moisture.

how many capsules do you get and how easy are they to find?

There were 10 capsules for each test, easy to do, and fairly accurate I think. I'm a science teacher and have used this type of test before. They were color coded and in separate bags.

Can i get spare capsules for the tester on amazon?

If you want to test across multiple seasons, look for "Luster Leaf 1880 Rapitest Tester Electronic 4-Way Analyzer, Soil". The meter can be used over and over without regard to having any chemical capsules to use.

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Rapitest 1602 Soil Test Kit for Garden, Vegetable, Flower, and Lawn USA designed and assembled the soil tester completely, quickly and accurately measures/analyzes the soil pH acidity and garden nutrients

Rapitest 1602 Soil Test Kit for Garden, Vegetable, Flower, and Lawn USA designed and assembled the soil tester completely, quickly and accurately measures/analyzes the soil pH acidity and garden nutrients

Product ID: 729566920

Details

Brand
Luster Leaf
Global Trade Identification Number
Style
Soil Test Kit
UPC
035307016027

🌈Patented color comparator

📊Measures pH, N, P, K

⏱️Fast 20-test kit

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Description

🌿 Unlock your garden’s full potential—test smarter, grow stronger!

RAPID 20 TEST PRECISION - Get accurate soil pH and nutrient levels with 20 comprehensive tests—perfect for multiple garden spots.
COMPLETE NUTRIENT ANALYSIS - Measures essential soil nutrients—pH, nitrogen, phosphorus, and potash—to optimize plant health.
INNOVATIVE COLOR COMPARATOR - Easily match soil sample colors to patented charts for quick, reliable results without guesswork.
DESIGNED ASSEMBLED IN THE USA - Quality you can trust, supporting your garden’s growth with American innovation and reliability.
USER FRIENDLY FOR ALL GARDENERS - Clear, detailed instructions and a plant pH priority list for over 450 species make testing effortless.

The Rapitest 1602 Soil Test Kit is a USA-designed, easy-to-use solution providing fast, accurate measurements of soil pH and key nutrients (nitrogen, phosphorus, potash). With 20 tests per kit and a patented color comparator system, it empowers gardeners—beginners and pros alike—to optimize soil health and boost plant growth across a wide variety of species.

Reviews

J**.

Easy to use , good instructions

7.11.2025

V**I

Lieferung wie verschprochen. Artikel wie beschrieben.

6.11.2024

F**H

I was very keen on using this test to test my soil here in Australia. Unfortunately only the K one triggered a result. Tried it twice (once with really cloudy and once with less cloudy water.) I find it hard to believe that my luscious well maintained and well fertilised lawn is completely devoid of N+P.

28.03.2022

T**L

easy to use

11.02.2026

R**H

The testing kit works very well- it would be even better if replacement test capsules were available

17.07.2025

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NZ$93

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ASIN	B01HQXF0PS
Amazon Bestseller	#567,735 in DIY, Tools & Garden ( See Top 100 in DIY, Tools & Garden ) #18 in Soil Test Kits
Item model number	1602
Manufacturer	Luster Leaf
Product Dimensions	3.3 x 25.91 x 10.92 cm; 118 g

Rapitest 1602 Soil Test Kit for Garden, Vegetable, Flower, and Lawn USA designed and assembled the soil tester completely, quickly and accurately measures/analyzes the soil pH acidity and garden nutrients

Details

Details

Description

Specifications

Reviews

Common Questions