Will fertilizer fix yellow leaves?

Fertilizer is not a catch-all solution for yellow leaves. It only helps if the issue stems from nutrient deficits - which is 20% of the time - but fertilizing indiscriminately builds salt up. It will only exacerbate the yellowing of the leaves. I killed my fern learning this lesson.

Before administering any fertilizer, be sure to test your soil to know exactly what's going into your plants. Simple test kits are available for checking pH and nutrient levels in your soil. When I tested my gardenias, I discovered that the soil was alkaline, which restricted iron uptake. I used chelated iron (not regular fertilizer), and within a few weeks, the gardenias had regained their green color.

Use targeted supplements exactly for known deficiencies. Nitrogen deficiencies require balanced applications. Iron deficiencies require amendments with an acidic product. Magnesium deficiencies use Epsom salts. Always water plants before applying any products to avoid root burn and increase uptake.

"Testing the soil annually with some organic amendments will help eliminate any fertilizer issues. For instance, I am now adding compost every spring to continue providing nutrients. Slow-release fertilizers that do not leave salt behind are applied every three months to prevent deficiencies, thereby reducing the chance of salt buildup. This method keeps my plants healthy and vibrant without the use of added chemicals. "

Read the full article: 10 Reasons Why Leaves Turn Yellow