Causes of Yellow Leaves on Rose Bushes

Yellow leaves on rose bushes can develop yellow leaves for a variety of reasons including fungal disease, insect pests, environmental stressors and incorrect gardening practices. While it may be difficult to pinpoint the cause of the problem right away, identifying the root causes can help you get your roses back to their healthy green state.

One common cause of yellowing leaves is overwatering or underwatering. Watering too frequently can lead to soggy soil that suffocates the roots and prevents them from absorbing nutrients. If you have been overwatering, try to give your plant less water and allow the soil to dry out a bit between irrigations. You can use a moisture meter or simply sense the soil’s moisture with your hands to determine how wet the soil is.

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Another common cause of yellowing is improper fertilization. If you have been feeding your roses too frequently with granular or foliar fertilizers, the yellowing leaves may be a result of nutrient burn. Reduce the amount of granular and foliar fertilizer you feed your roses to see if that helps.

Sunlight deprivation is also a common cause of yellowing leaves. The lower leaves of the rose bush can become shaded by more prominent branches and lose their ability to absorb sunlight, causing them to turn yellow and eventually fall off the plant. If this is the case, try moving your roses to a sunnier location.

Finally, excessive heat can also cause roses to turn yellow. If the weather is hot and dry, it can soak up the moisture in the leaves, causing them to curl up and then yellow or brown. To help combat this, water your plants earlier in the day and make sure the soil dries out before the evening.