close-up photo of soil after tilling

Knowing the pH and nutrient content of your soil is important to successful growing.

Soils and Climate


For Garden Diagnostic and Soil Testing Services, please visit our Horticulture Center/East Meadow Farm at 832 Merrick Avenue, East Meadow, NY. Diagnostic drop off service is available Tuesday, Wednesday, Thursday and Saturday from 10am to 1:00pm. You will be greeted outside and can drop off the sample with the representative at the desk.

You can also use a Cornell University partner lab., Dairy One that is open and accepting soil samples by mail. You will have results back to you within 10-14 days and they will provide Cornell recommendations.

Use Form H

For questions about submitting a soil sample please call the Dairy-One Laboratory directly at (607) 375-9962 or (800) 344-2697 (ask for soil lab customer service) or go to

Feel free to contact us if you have any questions.


Soil Survey of Nassau County. This 167-page PDF publication, compiled by the USDA Soil Conservation Service in cooperation with the Cornell University Agricultural Experiment Station, includes maps with soil names and descriptions for Nassau County, NY.

Soil Texture. This factsheet discusses the four soil texture classifications of sands, silts, loams and clays; how they combine to make textural classifications; how soil texture is determined; and the 5 soil management groups in New York State.

Soil Organic Matter. This factsheet describes types of organic matter in soil; their physical, chemical & biological benefits; farm practices that help maintain or increase soil organic matter levels; and the importance of continued monitoring of soil organic matter content.

The Cornell Soil Health website offers a variety of resources on soil testing and improvement.

Soil Testing. Visit our page on "How to take a soil sample" for testing.

For a soil nutrient profile and other specialized soil test, click here. For more information on soil quality and testing, click here.


Growing Degree Days (GDD) are a measure of heat accumulation used by horticulturalists to predict the date that a flower will bloom or a crop reach maturity. Statistics for the Northeast are provided on this Cornell Atmospheric Sciences & Turf Team website. See also our page on this topic.

Cornell Gardening page with information on average dates for last spring frost and first fall frost, US hardiness zone map, and microclimates.

Last updated July 23, 2020