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Spring Garlic Recommendations

Crystal Stewart-Courtens, Extension Vegetable Specialist
Eastern New York Commercial Horticulture

April 2, 2012

Spring Garlic Recommendations
The warm (hot) weather we have seen is pushing soil temperatures up and really moving the garlic along. We are well over a month ahead of last year. This means that fertilizing needs to start significantly earlier as well. Your first application of nitrogen should occur shortly after plant emergence, and certainly by the time plants are six inches tall. Rates and additional application timing is included in the table below. Ideally, before planting, you used a soil test to amend your phosphorus and potassium levels. Even if you didn't, the nitrogen recommendations provided are still accurate. Remember to adjust for leguminous cover crops, which supply some slower-released nitrogen. See Table 1 for more information.

Weed control: Once weeds are allowed to establish in a garlic field, garlic is virtually unable to compete for water, nutrients and light. The key to weed control is to take care of weeds early. There are a few chemical controls available (Table 1). Clean, weed-free mulch is often applied in the fall after the ground freezes and may be left on through the growing season. This will suppress germination of annual weeds. Perennial weeds should be controlled physically or chemically prior to planting in the fall, because they are nearly impossible to control during the growing season. Surface cultivation between rows to control seedlings is effective, but in-row mechanical cultivation is quite disruptive. Flame weeding of seedlings between rows is also effective if no hay mulch is being used. -CLS





Garlic Fertility Table 1 (pdf; 184KB)

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Upcoming Events

Good Agricultural Practices (GAPs) Food Safety Training

March 10, 2026
Newark, NY

Learn about food safety on the farm! This event hosted by the Cornell Vegetable Program, Cornell Lake Ontario Fruit Team, CCE Wayne County, and the NYS Department of Agriculture, will cover good agricultural practices (GAPs) to help reduce the risk of microbial contamination on the farm, keeping food and consumers safe.

View Good Agricultural Practices (GAPs) Food Safety Training Details

Urban Ag Food Safety Webinar

March 11, 2026

Urban and small-scale producers are encouraged to join us for the Urban Ag Food Safety webinar, featuring speakers from Cornell Cooperative Extension and Cornell IPM. We will explore the 'why' behind food safety, providing a basic overview and diving into specific urban ag considerations including water, pest, rodent, and soil health challenges. We will touch on the regulation and marketing landscape, and share resources for learning more. Bring your questions!

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2026 NYS Processing Vegetable Educational Meeting

Event Offers DEC Credits

March 16, 2026
Batavia, NY

Processing vegetable industry members who grow, manage, or support crop production for Farm Fresh First/Nortera Foods, Seneca Foods and/or Love Beets, are encouraged to sign-up for the 2026 NYS Processing Vegetable Industry Meeting! You will:

  • Network at this in-person meeting.
  • Learn the results of industry-funded research.
  • Have a voice in Cornell research and Extension.

DEC recertification credits available: 2.0 in categories 1a, 10, and 23.

2.0 Certified Crop Advisor (CCA) credits available.

View 2026 NYS Processing Vegetable Educational Meeting Details

Announcements

2025 Year in Review

Our 2025 Year in Review and 2026 Preview report highlights some of the many research and educational programs led by our team in 2025. Plus, we provide a sneak peek at some of our plans for 2026!
  • Integrating Laser Weeders into Muck Onion Production
  • Cornell Vegetable Program Advances Cover Crop Research
  • New, Interactive Pesticide Safety Programming Protects Farmer Health
  • Specialty Potato Variety Trial Tests Varieties During a Hot Growing Season
  • Mushroom Enthusiasm Grows
  • Equipping Sweet Corn Growers for an Emerging Disease: Tar Spot
  • Farm Food Safety Educational Outreach
  • Sustainable Pest Management for New York Urban Farmers
  • In 2026...


Cornell Crop and Pest Management Guidelines Paused

From Cornell IPM:

Highlighting its commitment to quality and long-term sustainability, Cornell Integrated Pest Management's Pesticide Safety Education Program has announced a pause in production of the 2026 Cornell Crop and Pest Management Guidelines.

Cornell IPM Director Alejandro Calixto said this temporary measure is the result of a comprehensive reimagining process facilitated by Illume Projects of Ithaca, which included end-user interviews, internal surveys and sales data analytics.

"It became clear to us that we cannot continue producing the guidelines and fully restructure them at the same time," Calixto said. "By pausing production, we can dedicate all available resources and time to rebuilding the production process, ensuring that when we re-launch in 2027, the guidelines will reflect a modernized approach built around the grower and other user experience."

A series of annually updated reference manuals produced by Cornell IPM and the College of Agriculture and Life Sciences (CALS), the Cornell Crop and Pest Management Guidelines are widely used by farmers, agronomists, crop consultants and extension educators in New York and throughout the Northeast. They include information about current IPM recommendations, pesticide options, cultural practices, nutrient management, disease, insect and weed identification and resistance-management strategies.

Calixto and Pesticide Safety Education Program Lead Mike Helms will spearhead efforts to restructure the guideline process over the next 12 months, with a goal of launching a more streamlined, user-friendly version in 2027.

Limited copies of the 2025 guidelines remain available for purchase while supplies last through The Cornell Store. The 2026-2027 Greenhouse Guidelines will be available.

For more information contact Helms at mjh14@cornell.edu.


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