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4 individual color comparators for pH, N, P, K. 10 tests for each. Contains components for 40 tests. 10 each for Soil pH, N, P and K Comes with sturdy plastic case Simple and detailed instructions included pH preference list for hundreds of plants included Tips for gardening and altering soil conditions included
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🇺🇸 Ship from USA · On Agora since 2026
$29.95