Potassium nutrition for greenhouse tomatoes in the Northeast

Project Overview

Project Type: Farmer
Funds awarded in 2007: $7,238.00
Projected End Date: 12/31/2009
Region: Northeast
State: New Hampshire
Project Leader:


  • Vegetables: tomatoes


  • Crop Production: fertigation, nutrient cycling, tissue analysis
  • Education and Training: farmer to farmer, on-farm/ranch research
  • Production Systems: general crop production
  • Soil Management: organic matter, nutrient mineralization

    Proposal summary:

    The potassium nutrition requirements of tomatoes has been thoroughly studied for hydroponic systems and field grown tomato systems, but little work has been examined potassium nutrition for ground production in greenhouses or tunnels where leaching does not occur. This project will compare timing and quantities of potassium applications to determine the levels needed to produce high-quality fruits over a long production season while minimizing unnecessary fertilizer applications. Outreach will be through a twilight meeting, presentations, and articles.

    Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture or SARE.