Nitrogen Fertility Options for Organic High Tunnels
Cordelia Machanoff, Program Aide
Cornell Vegetable Program

Given the longer season and higher yields of tunnel tomatoes, a nitrogen fertilizer to inject or side-dress will help prevent mid-season deficiencies.
Our recommendations and pre-plant and in-season organic nitrogen sources are provided in the PDF below.
This work is part of a 2-year project between CCE Cornell Vegetable Program and NOFA-NY with support from the New York Farm Viability Institute.
Nitrogen Fertility Options for Organic High Tunnels, May 2017 (pdf; 1094KB)


Upcoming Events
Food Safety Lunch and Learn Webinar Series
February 11, 2025 : Part One: What's Going on with Food Safety?
NYS Department of Agriculture and Markets FSMA inspectors are expected to step up farm visits this season. Why are they showing up on the farm asking about FSMA? Aren't we exempt? This noontime hour we will discuss the purpose of the farm visits and what produce farmers need to know.
February 18, 2025 : Part Two: What Counts as Food Processing?
In this session, we will discuss what counts as processing and what doesn't. Stories of inspectors coming to farmers markets and auctions telling some growers certain products can't be sold usually without much explanation. We will try to make some sense of things and clear up some misunderstandings so hopefully the upcoming season goes smoothly.
February 25, 2025 : Part Three: Traceability - Benefits for Food Safety and Beyond
Can having a traceback process for your produce (and other farm products) make good business sense regardless of FSMA regulations? We will (try to) make the case for farms to have some sort of traceability mechanism in place.
Allium Pests!
February 26, 2025
Presented by Christy Hoepting (CCE Cornell Vegetable Program) and Ann Hazelrigg (Univ. of VT), this webinar will focus on organic management of pests and diseases of onions, garlic, leeks. The webinar is part of a series supported by the Transition to Organic Partnership Program.
Good Agricultural Practices (GAPs) Training
March 4 - March 5, 2025
Syracuse, NY
This two-day workshop will train fruit and vegetable growers and others interested in produce safety, the Food Safety Modernization Act (FSMA), the Produce Safety Rule, Good Agricultural Practices (GAPSs), and co-management of natural resources and food safety. (A remote attendance option is available.)