Spring Soil Amendments: What to Add to the Field in March

"Unless the ground is frozen solid, it's a good time to include some March amendments. If you're on the edge of winter, use a thermometer to determine whether or not it's a good time to amend your soil. Wait for a minimum temperature of 40°F (4°C). If temps are still too cold, use the time to source and gather your amendments."

"Adding compost to the fields is beneficial, no matter what you are growing on your land. This part organic, part abiotic amendment feeds the soil and supports the microbiome. The beneficial fungi, bacteria, and archaea present in compost support an even and consistent exchange, making nutrients easily available to plants."

"Compost is among the most gentle March amendments, providing fertility that releases slowly over time, rather than all at once like a synthetic fertilizer would. The only thing to note is that compost is slightly acidic, so if you're working with a highly acidic soil, it could lower the pH over time."

March presents an optimal window for soil amendments as winter transitions to spring, though timing varies by region. Before amending, verify ground temperature reaches at least 40°F using a thermometer. Many necessary amendments are available on-farm or from neighboring farms, reducing the need for external purchases. Compost stands out as a versatile, beneficial amendment suitable for all farmland types. It combines organic and abiotic components that nourish soil and support beneficial microorganisms including fungi, bacteria, and archaea. These microorganisms facilitate nutrient exchange and availability to plants. Compost releases fertility gradually rather than all at once, making it gentler than synthetic fertilizers. The primary consideration is compost's slight acidity, which may lower pH in already acidic soils over time.

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