Test your pH and NPK with Tester kits.  Keep in check with your garden soils nutrients easily with a few simple steps.  Grow great flowers, shrubs, trees, fruits and veggies by finding what your soil needs.  Rapitest Soil Test kit includes 10 quick test (2 ph, 2 (N), 2 (P), 2 (K)) with directions and charts for accurate reading, choose Environmental Concepts 40 test which includes: detailed diagrams, colorimetric and turbidity reading charts as well as hundreds of pH preferences or choose pH soil tester 10 tests which includes: color comparator, 10 pH test capsules, complete instructions for adjusting soil pH and pH preference list for over 450 plants for the home yard and garden.  Both are easy to use.