NPK Test Kit

If your plants are looking sickly and stunted, but no pests are evident, poor nutrition may be to blame. This NPK Test Kit tells you exactly which fertilizer you need – nitrogen, phosphorus or potassium. Also includes 10 pH tests Test before you fertilize and save money! 1-3/4" L x 1/2" D x 2-3/4" H Includes bottles, caplets and color charts. Distilled water is recommended for testing.


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