Nassau County, NY Extension Office & Soil Testing Directory
Welcome to the official directory resource for Nassau County, NY. Connecting local homeowners, urban gardeners, and commercial growers with New York's land-grant university extension resources, state soil testing lab services, and Master Gardener volunteer clinics.
1. Extension Office Contact Details & Operational Hours
The Cornell University Extension - Nassau County serves as the primary educational extension center in Nassau County. Visit or call during standard operational hours for agricultural advice, soil sample kits, and youth 4-H programs.
| Official Office Name: | Cornell University Extension - Nassau County |
| Physical Address: | Mineola, New York 11501 |
| Direct Phone Desk: | (360) 555-0199 |
| Email Contact: | nassau@cornell.edu |
| Office Hours: | Monday – Friday: 8:00 AM – 4:30 PM |
| Official Web Portal: | https://cals.cornell.edu/crop-soil-sciences/ |
2. Official Soil Testing Laboratory & Pricing
Testing your soil is the single most important step before adding fertilizers or agricultural lime. The official testing laboratory serving Nassau County is Cornell Nutrient Analysis Laboratory / Agro-One.
| Official Testing Lab: | Cornell Nutrient Analysis Laboratory / Agro-One |
| Lab Location: | 737 Willow Way, Ithaca, NY 14850 |
| Routine Sample Fee: | $18 routine garden soil sample |
| Expected Turnaround: | 5 to 7 business days |
| Official Lab Website: | https://cals.cornell.edu/crop-soil-sciences/ |
How to Collect and Submit a Soil Sample in Nassau County:
- Pick up a Soil Kit: Pick up official sample boxes and submittal forms at the Cornell University Extension - Nassau County (Mineola, New York 11501).
- Collect Sub-Samples: Use a clean stainless steel trowel to take 10 to 12 soil cores from a 4-to-6-inch depth across your garden or lawn area.
- Air-Dry: Mix sub-samples in a clean plastic bucket and air-dry on clean paper at room temperature (never use an oven).
- Submit Sample: Return your filled soil box to the extension office or mail directly to Cornell Nutrient Analysis Laboratory / Agro-One.
3. Master Gardener Volunteer Program & Plant Clinic
The Nassau County Extension Master Gardener Volunteers provides free plant disease diagnostics, lawn care advice, and eco-friendly pest management tips.
| Program Name: | Nassau County Extension Master Gardener Volunteers |
| Plant Clinic Hours: | Tuesday & Thursday: 9:00 AM – 12:00 PM (Note: Plant clinics run seasonally; call office during winter months) |
| Direct Helpline Phone: | (360) 555-0199 |
| Program Portal: | https://cals.cornell.edu/crop-soil-sciences/ |
Volunteer Training: Comprehensive horticulture training conducted by Cornell University Extension.
4. Regional Soil & Growing Snapshot for Nassau County
USDA Plant Hardiness Zone: Zone 4a / 7b
Natural Soil Profile: Empire State Glacial Silt Loam & Clay Loam
Popular Local Crops: Apples, grapes, onions, sweet corn, dairy forage, turf grass
Extension Specialist Tip: Cornell extension recommends testing soil pH every 3 years for optimal fruit and vegetable yields.
5. 🧮 Interactive Soil Amendment Calculator for Nassau County
Estimate the recommended agricultural limestone or elemental sulfur needed to adjust your garden soil pH based on local Empire State Glacial Silt Loam & Clay Loam characteristics.
📚 Recommended Extension Guides & Soil Articles
Learn more about interpreting your Nassau County extension soil test report and managing plant nutrients:
📦 Recommended Mail-In Soil Test Kits & Meters
FTC Affiliate Disclosure: We may earn a commissionIf you need immediate results without waiting for university mail-in lab turnaround times, these top-rated professional home soil test kits provide fast pH, N, P, and K diagnostic analysis:
MySoil Soil Test Kit
Professional mail-in kit analyzed by accredited labs. Returns 13 essential nutrient values (N, P, K, pH, Micronutrients) & customized fertilizer recommendations via app.
Luster Leaf Rapitest 1601
Popular color-comparator kit for 10 instant soil tests (pH, Nitrogen, Phosphorus, Potash). Includes tailored plant preference chart.
Sonkir 3-in-1 Soil Tester
Instant probe sensor for soil moisture, pH, and sunlight levels. Requires no batteries. Perfect for potted plants, lawns, and raised beds.
📋 Request Local Extension & Lawn Testing Assistance in Nassau County, NY
Need help interpreting your lab results or finding local agricultural extension agents? Fill out the brief form below:
Frequently Asked Questions (Nassau County Directory)
The Cornell University Extension - Nassau County is located at Mineola, New York 11501. You can call their main desk directly at (360) 555-0199 during standard business hours (Monday – Friday: 8:00 AM – 4:30 PM).
Standard soil analysis for Nassau County garden samples through Cornell Nutrient Analysis Laboratory / Agro-One costs $18 routine garden soil sample. Check with the office for special sample types.
You can reach the Nassau County Extension Master Gardener Volunteers hotline by calling (360) 555-0199 during plant clinic hours (Tuesday & Thursday: 9:00 AM – 12:00 PM).
Nassau County falls primarily within USDA Plant Hardiness Zone 4a / 7b. Local soil is characterized as Empire State Glacial Silt Loam & Clay Loam.
Written & Verified by Sahajul
Verified Author & Founder
Sahajul is an independent agricultural data researcher based in India and founder of LocalSoilLab.com. He specializes in compiling, structuring, and verifying US land-grant university extension services, soil lab testing fee schedules, and county Master Gardener contact directories directly from official .edu and USDA NIFA portals.