Four o clock plant

Question

planted tubers in May, plenty of growth but as yet no flowers…do they not flower first season? If they do what month do they flower in North West England?

Answer 1

Four o'clocks do flower in the first season, but they can be temperamental about it, responding to temperature. This article should tell you more:
https://www.gardeningknowhow.com/ornamental/flowers/four-oclocks/four-oclocks-wont-bloom.htm