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.
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.
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 …
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Luster Leaf Rapitest Soil Test Kit 1601 does not show an MSDS. Please contact Luster Leaf at 1-800-327-4635 for further information.
The Luster Leaf Rapitest Soil Test Kit 1601 has specific instructions listed here for use for testing and results. If it has been 5 days, you will want to perform a new test as directed.