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How to Manage and Prevent Tip Burn

Understanding and Addressing the Causes of Tip Burn

Overview

Tip burn is a common issue in hydroponic systems, manifesting as browning or necrosis at the tips of plant leaves. This condition can arise from various factors, often signaling underlying problems in the growing environment. 

Common Causes of Tip Burn: 

  1. Poor Air Circulation: 
    1. Often the most prevalent cause, poor air circulation can result from: 
      1. Inactive VAFs (Vertical Airflow Fans) 
      2. Significant leaks in ducting that disrupt airflow 
  2. Immobile Nutrients: 
    1. Nutrient deficiencies or toxicities can hinder proper plant growth. 
  3. Nutrient Uptake Issues: 
    1. Factors affecting how nutrients are absorbed by plants can lead to stress and symptoms of tip burn. 
  4. Tight Plant Growth Habit: 
    1. Crowded plants may compete for resources, leading to inadequate air circulation and nutrient distribution. 

Information Gathering for Diagnosis: 

Before discussing the issue further, please collect the following information: 

  • Location of the Issue: 
    • Where in the system did the problem occur? 
  • Cultivar Impact: 
    • How many cultivars were affected? Is it isolated to one, or does it extend to others? Include photos for reference. 
  • Percentage of Affected Plants: 
    • What percentage of the plants show signs of tip burn? 
  • Root and Shoot Impact: 
    • Were both roots and shoots affected? Provide photos if possible. 
  • Environmental Conditions: 
    • What do temperature and humidity levels look like? Note any fluctuations or spikes. 
  • Pre-existing System Issues: 
    • Are there any other known issues within the growing system? 
  • VAF System Status: 
    • Was the VAF system operational? Check for any visible damage or blockages in holes or inlets. 

Recommendations for Addressing Tip Burn: 

  • If tip burn is a significant concern for business operations or sales, consider donating the affected produce. While not visually appealing, it remains safe and edible. 
  • Ensure adherence to good sanitation practices and follow SOP: Regular Maintenance & Operations for optimal farm care. 
  • For VAF-related issues, monitor the functionality of the VAF system to ensure that fans are operating correctly and on schedule. 

Summary

Tip burn in hydroponic systems can stem from multiple environmental and system-related factors, such as poor air circulation, nutrient issues, and plant overcrowding. By collecting detailed diagnostic information, such as environmental conditions and system performance, you can identify the root cause of the problem. Following the recommended actions, such as addressing VAF system issues and maintaining optimal farm practices, will help mitigate tip burn and promote healthier plants.

For farms where tip burn is affecting product quality, donating the affected produce can be a viable option, as it remains safe to consume despite its appearance. Regular maintenance and monitoring of farm systems are essential in preventing and addressing this issue in the future.