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.
USD 20.00
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