Q.Hibiscus
Have a large Hibiscus, looks very healthy but hasn’t flowered this year. What should I do, please?
Thanks
Sheila

There could be a few reasons for lack of flowering including sunlight and water.
Generally the plants that appear lush and green have to much Nitrogen in the soil.
Adding a Phosphorous rich fertilizer such as Bone Meal will encourage blooming.
Here are some links for you.
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/bone-meal-fertilizer.htm
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/how-to-care-for-hibiscus-plants.htm