Reasons for Phalaenopsis flower buds to fall off

Large temperature difference between day and night

If the temperature difference between day and night is too large, the plant will be unable to adapt to the sudden change in temperature conditions, which will cause bud drop.

Mites and other pests

Generally, the flower buds will suddenly become dehydrated and their color will turn into an abnormal dark red. When the insect infestation is serious, all the flower buds will fall off.

Root damage

Improper application of water and fertilizer will cause abnormal root growth. If the roots remain hypoxic for a long time, it will be difficult to provide sufficient nutrients, resulting in bud falling.

Environmental pollution

When the air is polluted, the harmful substances contained in it enter the tissues of the flower buds due to the effect of osmotic pressure. If you open the affected flower buds at this time, you can see small water droplets inside; the contaminated flower buds are mostly yellow-brown, and in severe cases they are black, and will become moldy and fall off.

Insufficient photosynthesis

If the plant does not receive sufficient light during the day, its respiration will increase at night, causing the plant's internal nutrients to be in short supply, making it difficult to maintain normal flower bud growth.

Poor ventilation in the greenhouse

If the indoor air is not ventilated promptly and adequately, it will be difficult to provide Phalaenopsis with sufficient fresh carbon dioxide for photosynthesis, which will also result in insufficient nutrient production.

High temperatures both day and night

That is, the daytime temperature is higher than 29℃ and the nighttime temperature is higher than 20℃. This will accelerate the metabolism of the plant, causing excessive loss of nutrients, easily causing the flower buds to turn yellow, and in severe cases, they will fall off.

Medium is too wet

If the medium is too wet during the flowering period, the oxygen content inside the root system will be greatly reduced, which will have an adverse effect on the normal development of the flower buds. Not only will the flowers be small and dull, but in severe cases, the buds will fall off.

Relative humidity is too low

If the humidity in the air cannot reach the conditions required for the normal growth of Phalaenopsis, the pollen grains in the flower will fall off.

Mechanical damage

When shaping and pruning Phalaenopsis, if the inside of the pedicel is accidentally damaged, it will affect the normal supply of nutrients. Or if the roots are accidentally broken when potting, the normal nutrient supply of the plant will also be affected.

Use of hormone drugs

If you spray Phalaenopsis with hormone drugs such as bud multiplier and dwarfing agent during the flowering and seedling stage, the plant may easily drop its buds.