Please explain how I can provide the best conditions to encourage reblooming.
Certified GKH Gardening Expert
It really depends on the plant. Some plants can be encouraged to rebloom through deadheading (https://www.gardeningknowhow.com/ornamental/flowers/fgen/deadheading-flowers.htm).
Others need a dormancy period. While still others need a cold period.
Most plants appreciate a dose of phosphorous to help them with blooming and making sure they are getting the correct amount of light is essential.