Q.care of young (less than 1 year old) hibiscus plants
How often do hibiscus plants need to be watered and fed during summer?
Watering will depend on the temperatures and environment conditions.
Your Hibiscus in a container may need to be watered as much as twice a day.
These links will refresh you on the care requirements.
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/how-to-care-for-hibiscus-plants.htm
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/deadheading-hibiscus-flowers.htm
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/tips-for-pruning-hibiscus-plants-when-to-prune-hibiscus.htm
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-fertilizing.htm