Q.Taken Indoors For Wintering
Sweet peppers taken indoors. Sunlight bulbs are in place. It’s 23/24c as we have heat lamps for tortoises. Why am I getting tiny flower buds which drop off and don’t even make it fĺoowes. Mr Gibbons
Certified GKH Gardening Expert
If it was doing well outside, but started declining indoors, then I would suspect that the plant is showing signs of stress from a drastic change in environment.
This can be due to lack of light, as well. Peppers need full, bright sunlight to thrive and fruit. Dropping of flowers can be a sign that the light is bright enough to sustain growth, but not bright enough to sustain flowering and fruiting.
https://www.gardeningknowhow.com/edible/vegetables/pepper/how-to-grow-indoor-peppers.htm