v1.1 (2026-08-23) · Alternate nutrient source for commercial vegetables in CT, MA, ME, RI, and VT. Soil-test categories are the guide's Table 5 names (Very Low / Low / Optimum / Above Optimum); rates are keyed to the category printed on the farmer's New England lab report. Table 5 prints no ppm cutoffs; this source does not classify from ppm. Crop P2O5/K2O rates are the TOTAL RECOMMENDED row of each crop page (or the broadcast vs band row when TOTAL is a planting-method range). Nitrogen published as a range is staged as a range and is not rated.
Regional guide co-published by the Extension Vegetable Programs of the Universities of Maine, New Hampshire, Vermont, Connecticut, Rhode Island, and Massachusetts, as well as the Maine Organic Farmers & Gardeners' Association. “The nutrient recommendation tables in this Guide are applicable to the New England soil test results given as very low, low, optimum (medium or high), and above optimum (very high or excessive).” UNH reports Mehlich-3; this source does not rate New Hampshire samples. Your state's soil-test report recommendations supersede.
State extension method. Zone Forge computes this source's supported nutrient rates in-app and cites the published method.
Yes — Zone Forge's calculators are free and need no signup. This page shows the states and crops New England Vegetable Management Guide 2025-2026 covers so you can verify the source behind your recommendation.
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