How do I test garden soil in Connecticut?
Short answer: Send a representative sample from the garden area to the UConn Soil Nutrient Analysis Laboratory and use the report to decide whether lime or fertilizer is needed. The routine fertility test reports soil pH and plant-available nutrients; it is not a test for every contaminant, insect, or disease.
How to decide
Choose the right time and area
UConn accepts soil samples whenever the ground is not frozen. Fall is especially useful because recommended amendments have time to react before spring. Keep different beds or management areas separate when their histories or uses differ.
Collect and submit the sample using the lab instructions
Follow UConn's current sampling brochure and submission directions for collection depth, mixing, drying, labeling, fees and delivery. State which plants you intend to grow so the recommendations can fit the garden.
Read the report before buying amendments
The standard fertility test provides pH and nutrients including phosphorus, potassium, calcium and magnesium; UConn also offers additional tests. Apply amendments only when the results and crop requirements support them, then retest after substantial adjustments.
Important: Routine soil fertility testing does not diagnose pests, diseases, drainage problems or contaminants such as petroleum or pesticides. If contamination is suspected, contact an appropriate environmental lab. UConn generally recommends retesting home gardens about every three to five years unless monitoring a correction.