Test annually if you're actively amending soil or new to a property. Test every 2-3 years for established gardens and pastures in maintenance mode. Test after any major event (heavy lime, manure spreading, soil disturbance) to track changes. Spring testing — before planting — gives time to apply amendments.
State extension labs run $10-20 per sample and include amendment recommendations.
More in Soil Health & Amendments
Cluster anchor
How do I read a soil test report?
How do cover crops improve soil health?
How do I lower soil pH?
How do I raise soil pH?
Reading now
How often should I test my soil?
What does low phosphorus mean for my crops?
What does nitrogen deficiency look like in corn?
What is cation exchange capacity and why does it matter?
What is organic matter and how do I increase it?
What is the difference between soil pH and soil fertility?
What pH should my soil be for pasture grass?
What pH should my soil be for vegetables?
Track soil tests, frost dates, planting and harvest cycles, and yield outcomes — year over year. 14-day free trial, no credit card.
Start free trial →