Q.Cause of bud drop in Aeschynanthus radicans
I received this plant when it was almost dead. I cut it back and it’s been growing beautifully and fast. The plant looks healthy. It’s been in the same place for almost a year, inside, at a South facing window (I’m in the northern hemisphere). The plant gets mostly direct light until about noon. I water it about once a week or a little less (through the summer). I fertilized it through the summer with 12-28-12. There’s no bugs anywhere as I’ve looked through the plant and buds. However it started budding about 3 mths ago and just before they bloom the buds fall off. I’ve probably lost about 10 so far and there’s still a lot that are cropping up along each stem. I can’t figure it out as everything else looks healthy.
Any help would be greatly appreciated!
Thank you
Michelle

Certified GKH Gardening Expert
Well you are giving it light, water and fertilizer, so I wonder if the humidity is too low. The lipstick plant is a tropical plant and is used to high humidity. You can mist it several times a week with room-temperature water in a mist bottle.
Here is more on the care of the lipstick plant:
https://www.gardeningknowhow.com/houseplants/lipstick-plant/growing-lipstick-plants.htm
https://www.gardeningknowhow.com/houseplants/lipstick-plant/pruning-lipstick-plant.htm