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Q.gardenia yellow leaves

Zone 35406 | karen_a_c@comcast.net added on December 20, 2017 | Answered

gardenia yellow leaves – how do I get rid of them

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Certified GKH Gardening Expert
Answered on December 20, 2017

This can be due to a large number of things. If these are newer leaves, then it can mean that you have a nitrogen deficiency. If it is the lower leaves it could indicate that There could be a lack of light, over-watering, under-watering, magnesium, calcium deficiencies. Really a great number of things.

Most commonly, a simple pH adjustment will correct most of these. You can add dolomitic lime to keep the pH stable, but it would be best to get a cheap test kit and follow the instructions to find the exact pH. Adjust accordingly to keep it around 6.5. Iron sulfate will help lower the pH if it is too high.

Here is an article that will help: https://www.gardeningknowhow.com/ornamental/flowers/gardenia/gardenia-plant.htm

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