Luster Leaf Rapitest Soil Test Kit 1601

5 out of 5 stars 1 Reviews | 4 Q&A

Luster Leaf Rapitest Soil Test Kit 1601

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5 out of 5 stars Rating: 5

1 Review | 4 Q&A

Product Overview

Luster Leaf Rapitest Soil Test Kit 1601 is an inexpensive and innovative way of testing several soil conditions. Uses a unique and easy color comparator capsule system, 40 tests come with this kit and allow you to perform 10 tests each to measure the levels of pH, potassium, nitrogen, and phosphorus. Easy to follow instructions require no experience to perform these simple, accurate, tests with fast results. The included chart contains levels for NPK and pH for over 100 plants and has instructions included on adjusting fertilization and soil conditions.

Features and Specs

For use in Fruit, veggies, shrubs, trees, plants, flowers, grasses and lawns
Parts Included Contains tests for pH, nitrogen, phosphorus, and potassium levels; 40 tests in total, chart of pH and NPK levels
Shipping Weight 0.30 lbs
Manufacturer Luster Leaf Products, Inc. (Mfg. Number: 1601)
UPC 035307016010


Easy to follow instructions:

Simply mix soil with water then pour the water off, dissolve a test capsule, and compare the color to the included chart.

This Rapitest Soil Test Kit is designed for simplicity of use and accurate results. At the heart of the system are 4 patented, specially designed testing devices called “color comparators” - one each for pH, Nitrogen, Phosphorus and Potash. Each comparator has a removable film color chart and color coded top. Capsules for each test are also color-coded.

For lawns, annuals or house plants, take the soil sample from about 2-3" below the surface. For perennials especially shrubs, vegetables and fruit, the sample should be from 4” deep. Avoid touching the soil with your  hands. Test different areas of your soil, as it may differ according to past cultivation, underlying soil differences or a localized condition. It is preferable to make individual tests on several samples from different areas, than  to mix the samples together.  Place your soil sample into a clean container.  Break the sample up with the trowel or spoon and allow it to dry out naturally. This is not essential, however it makes working with the sample easier.  Remove any small stones, organic material such as grass, weeds or roots and hard particles of lime. Then crumble the sample finely and mix it thoroughly.

Dispose of test solutions by rinsing down the sink. Empty gelatin capsules should be disposed of immediately with household waste. Remove the color charts. Wash the comparators and caps in warm, soapy water  immediately after each use. Make sure any sediment or color staining is removed.  Rinse well and dry. Replace the color charts on the appropriate comparators. Each bag of capsules should be stored inside its comparator. Fit the caps on each comparator. Place all components back into the package. The blister pack has been specially designed to be reused as a storage container.  Store your kit in clean, dry conditions,  indoors. The powders are safe in normal domestic terms but like all chemicals & pharmaceuticals, they should be put away and kept out of reach of children. Try to avoid touching the powders. Always wash your hands thoroughly after making your tests. Do not eat, drink or smoke while using the soil test kit. Keep powders away from food, drink and animal feed. If taken internally, drink copious amounts of water and seek medical advice.

Where a lot of fertilizer is needed to correct one plant food, divide the applications over several weeks. Do not add lime and fertilizer together; lime first. Allow at least one month to pass before applying fertilizer. Retest 30 days after applying fertilizer.

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  • 5 of 5 Stars


    By Ithiel on 10/14/2022

    This product is easy to use once you read the instructions well. Would recommend.

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Questions & Answers

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The directions for the Luster Leaf Rapitest Soil Test Kit 1601 are unclear. What does "illuminate" mean- "shine on" or "shine through"?

It says "allow daylight (not direct sunlight) to illuminate the solution."


In the directions for the Luster Leaf Rapitest Soil Test Kit 1601, they are suggesting that you use natural light during the day to compare the test results color with the chart rather than comparing the colors at night using synthetic light.

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2 of 2 people found this answer helpful

Is the test chamber on the Luster Leaf Rapitest Soil Test Kit 1601 the small or large chamber?

The test chamber is the smaller chamber to the left if looking at the picture of the product on our website. The reference chamber is the larger one on the right of the Luster Leaf Rapitest Soil Test Kit 1601.

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Where can I find a MSDS sheet on this product? Or a list of the powders used inside each capsule for all tests
Luster Leaf Rapitest Soil Test Kit 1601 does not show an MSDS. Please contact Luster Leaf at 1-800-327-4635 for further information.

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1 of 3 people found this answer helpful

What is the best liquid or granulated fertilizer for an average blue grass lawn?

When choosing a fertilizer, we always recommend getting a soil sample completed first so that you have a starting point when fertilizing your lawn. This will tell you what your lawn needs the most to make or keep it healthy. Quick release fertilizers make nitrogen available immediately to encourage a rapid recovery however, they can cause burnlike damage and too much can cause growth to quickly that can actually weaken your lawn in the long run. Slow release fertilizer provide nitrogen over a period of time and a steady rate, and are less likely to cause burn and can improve the overall health of your lawn.  You can bring a soil sample to your local cooperative extension office for testing, or you can purchase a soil test kit.  

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Luster Leaf Rapitest Soil Test Kit 1601 5 out of 5 stars Rating: 5 (1 Reviews / 4 Q&A)

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