Water – Allowing the soil to dry out causes brown spots on gardenia flowers and buds that drop off before they bloom, so keep the soil around the shrub moist at all times. Bud mites cause the tips of the buds to turn brown, and the buds fall off before they bloom.Click to see full answer. Hereof, why are my gardenia buds not opening? Moisture and Nutrients Inadequate or excessive moisture can cause gardenia buds to drop before they open. Water the plant’s soil when the top 1 inch of the soil feels dry to the touch; keep the soil evenly moist, and spread a 3-inch-thick layer of mulch on the soil to retain moisture.Furthermore, why are my gardenia buds turning yellow? Poor drainage will cause both the leaves to yellow and buds to drop off. Another cause of yellow leaves is soil with a high pH. Too high, and the gardenia isn’t able to take in nutrients including magnesium and iron, resulting in yellow leaves. Buds dropping off can also be caused by low humidity. Likewise, how do you keep gardenia buds from falling off? Keep your gardenia out of drafts and in a room 55 to 65 degrees when trying to encourage or prolong bloom. Warmer and colder temperatures can interfere with flower development and lead to bud drop. Keep the soil moist but not wet. Fertilize gardenias with a dilute solution of any flowering houseplant fertilizer.Why are my flower buds dying?Improper Watering – Improper watering causes a great deal of stress to many plants. Under watering may cause plants to redirect water from enlarging buds to food-producing areas in an act of self-preservation. Over watering often leads to root rot, or other fungal infections that may destroy developing flower buds.

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