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Availability:
In Stock.
Arrives
Saturday, Jul 18
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Style: Digital Soil Test Kit
Size: 25 Tests
Features
- Power Source Type: Battery Powered
Description
Electronic version of Luster Leaf popular 1601 soil test kit. The rapitest digital soil tester utilizes advanced LED digital technology & Patent-pending optical calibration system to read test colors. The system is calibrated to read small color variations that can be difficult to distinguish with the human eye. The tester is easy to use. Just follow the easy instructions for each soil pH, nitrogen, phosphorus or potash tests; slide the test tube in optical chamber & push the appropriate button to get the test results. Once you have your soil test results, The tester booklet tells you how to adjust soil pH & provides recommendations for fertilizers. The booklet’s pH preference list allows you to select plants for your soils pH or know how much to adjust the soil pH for your current plants.
Brand: Luster Leaf
Style: Digital Soil Test Kit
Item Weight: 0.21 Kilograms
UPC:
Global Trade Identification Number: 58
Brand Name: Luster Leaf
UPC: 035307016058
Global Trade Identification Number: 58
Unit Count: 1.0 Count
Model Number: 1605
Manufacturer Part Number: LL01605
Manufacturer: Luster Leaf
Included Components: Digital Soil Kit
Item Type Name: Digital Soil Test Kit for pH, N, P and K
Style Name: Digital Soil Test Kit
Item Weight: 0.21 Kilograms
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Jul 18
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
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View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Directions were clear and easy to follow. Gave a us a good direction to go with starting our garden and what we need to make our soil healthier.
Reviewed in the United States on May 28, 2026 by shyann hines
I was under the impression from lack of research on my own part- however this kit only helps determine the color change it does not read levels from the soil alone. You still need capsules to add to soil testing and then put them into the machine to read the color- which really you can do with the naked eye. It did help me diagnose my soil as nitrogen only depletion and now my garden is thriving since I was able to fertilize with a nitrogen only formulation to correct the imbalance. Great if you are novice or trying to figure out what is up with your soil- but the cheaper kits without the machine will also do the job just fine.
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Reviewed in the United States on June 27, 2021 by N_W_TX
I do container gardening in Arizona and wanted to see what my soil quality was. This kit is hard to figure out and the instructions are in very small print. The markings on the test tube are almost invisible and become totally so when powdery soil is added. The reagents are in plastic capsules, which are very difficult to open without spilling reagent. A pipette is required but not supplied. I found an empty Scalpicin container and was able to use it as a dropper. All these things compromise accuracy. I would not recommend this kit.
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Reviewed in the United States on September 5, 2024 by Doug Huestis
Although this soil testing kit isn't instant, or even quick, or even easy, it's probably much more accurate than the test strips or any probe meter. I say probably because I don't really know but want it to be true. I used this kit to test soil from various parts of my yard before spring fertilizing. I've had real problem with pH in the past, but didn't really have a good handle on the other parameters. I followed the excellent directions, including allowing time for the soil sample suspensions to settle, and using distilled water, and indeed found variations in my yard that corresponded to problem areas. Hopefully, I was able to correct them using the included directions. My point is, this test kit gave me useful data - I think. I really like the light absorption method of measurement, which is much more of a professional lab technique than most testing kits. My only issue is that the base kit only gives you limited testing capacity (a relatively limited number of reagent capsules) so you can use up everything and need more in one testing spree, especially if you do yard and planting beds. Luster Leaf sells replacement capsules, but they aren't inexpensive and you really need to search to find them. You'd think the company would (a) give you more, (b) make it easier to get more. It's kind of like buying a printer where replacement toner cartridges exceed the printer price!!!
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Reviewed in the United States on May 14, 2026 by Kid Doc
So far, I've only used the pH test, but I'm very happy with the results. I never worried about pH levels until this past year, when my garden really didn't produce. Doing some research online, I found that pH levels play a critical role in a plant's ability to absorb nutrients. Shortly after that, just by chance, I ran across an old Ferry-Morse pH and Fertility meter at a garage sale. For a buck, what the heck. I tried it, but it stayed pretty much between 7.0 - 7.5. Was my soil that bad, or was this thing not working? I mixed some vinegar into the soil, and it did show movement to the acidic range, but I still wondered, was it working? Moving ahead 3 months, I ran across a TestWest pH meter on Amazon. It looked pretty cool, it seemed a lot easier to use (just poke it into the soil), and it could be used on indoor plants, which isn't specifically addressed with the Ferry-Morse. Once again, for under $15, what the heck. And also, to test everything further, I purchased this Luster Leaf Rapitest Digital Soil Test Kit . Like one of the other reviewers, I had used Luster Leaf's other soil test kit, but found it difficult to analyze the murky colors against the color charts, so I decided to go with this digital kit. Besides, it sounded pretty easy. Mix it up. Put the test tube into the meter, press a button to let the meter read the color and give you the results. What fun. For the test, I used the soil from one of my indoor plants, a 4-1/2 foot hibiscus. I followed Ferry-Morse's instructions, dug some soil out from about 3" down, watered it, let it set and then tested it. The Ferry-Morse read 5.8. The TestWest read 5.9. Pretty darn close. To validate the results, I used the same soil sample with the Luster Leaf Rapitest's pH test. Note: for the Luster Leaf's soil test, I followed Rapitest's instructions and set a bit of soil aside before watering it (they want to start with dry soil). After mixing the soil with the reagent and water, letting it set, placing it into the test chamber and pushing the TEST button, it lit up the 5.5 indicator--which means that the soil pH is between 5.5 and 5.9. I couldn't ask for a better validation (other than spending another $50+ and sending a soil sample to a full-fledged lab). All three tests instruments read within the same pH range. I already amended my garden soil this Fall (before I purchased this soil test kit) with a high sulfur fertilizer and an organic soil acidifier. I'll be testing my garden soil in the Spring with all four tests in this kit. I trust the results implicitly.
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Reviewed in the United States on November 5, 2018 by Old Guy JJ
I downgraded this from three stars to one star after further testing. I followed the directions perfectly and carefully, and I let the water sit for 24 hours to be extra careful. Each one of the results was on the most extreme side of the perspectrum. It said that my soil was a 7.5, which means lacking acid. It also said that it was in surplus of nitrogen phosphate and potassium. Forgive me if I have my doubts, but I just ordered this soil delivery and I want to understand it's nutrient content so that I can fertilize it properly. The results tell me I don't even need to touch it other than mixing in something to add acidity. I will be testing the soil on my property to see if the results come out differently, and I will also be testing homemade compost. The nail in the coffin was when I researched how to validate the device. I used lemon juice and poured it into the same soil solution, and follow the directions and then tested it again. The pH didn't change, and it still read 7.5... which would tell me that there's no acid. That's obviously false in this test kit is complete garbage. Don't waste your time and money.
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Reviewed in the United States on May 14, 2024 by Verified reviews
Living in an area of red clay soil, building a garden spot can be challenging. I have added organics, compost, as well as fertilizer. But I was still at a loss as to whether I had accomplished my goals or not. the Luster Leaf 1605 Rapidtest was exactly what I was looking for. You don't have to mix a chemical with water and then look at a color chart and try to find the color closest to your tube. There is no guessing with this kit. It reads the color for you. It has easy to follow instructions and gives you fast results which take out the guess work. I even retested the same soil to see if I would get consistent results or if the meter would give me a different reading. It was dead on, and it made me feel I was getting a good test. After testing the soil it has instructions as to what you need to do to correct your soil with what to add and even how much. Very satisfied.
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Reviewed in the United States on July 1, 2015 by William
I purchased this product due to its high reviews and ease of use. I will say it was easy to use but that's it. It comes with a booklet with a bunch of fancy looking numbers and advice on how to treat your soil based on your results but there is a fundamental problem. You don't get an actual numerical number for anything other than the pH. Sure there is a light that tells you your potassium, nitrogen or potash is adequate or depleted, etc. But then what? Based on the booklet, certain types of plants thrive under specific conditions. Makes sense, right? Okay, so what ARE the actual levels of this so called "sufficient" nitrogen? You won't know with this test! So therefore you can't adjust your soil, even if you needed to. I find this to be a catchy gadget that just did not deliver usable information.
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Reviewed in the United States on November 3, 2025 by Amaris Rena