Plant issue

The symptoms you're describing, with damage mainly on the upper half of the plant's leaves, could be indicative of nutrient imbalance or pH fluctuation. Leaf burn at the edges suggests a potential excess of certain nutrients. The fact that flushing with pH-adjusted water stopped the progression is a good sign. It likely helped remove excess salts or imbalances in the growing medium. To troubleshoot further: Check pH Levels: Regularly monitor the pH of your water and soil. Ensure it remains within the optimal range for your plants. Fluctuations can affect nutrient uptake. Nutrient Levels: Assess the nutrient levels in your soil. Excessive amounts of certain nutrients can lead to leaf burn. Consider using a balanced, well-formulated fertilizer. Watering Practices: Ensure that you are not overwatering or underwatering. Both extremes can stress the plant and affect nutrient uptake. Lighting: If the issue is only on the upper leaves, evaluate your lighting setup. Too much intensity or proximity of the light source can cause leaf burn. Keep a close eye on your plants, and if you notice any new developments or changes, adjust your care accordingly. Sometimes, these issues can be trial-and-error to find the perfect balance for your specific growing conditions.