Hibiscus Flower Care. The Spruce Nusha Ashjaee. In winter tropical and hardy hibiscus require less water and no fertilizing.
To encourage re-bloom remove old flowers before they form seed heads or prune plants back by one third after a flush of bloom is finished. Hibiscus do best when given hibiscus fertilizer frequently but lightly. 16-32 C and cannot tolerate temps below 32 F.
May 10 2020 Prune your hibiscus plant back to about 13 in early spring.
When the new growth matures and gets more woody flowers will start to build that can last from spring to autumn. Apr 28 2021 Hibiscus Care Outdoors Hardy hibiscus plants are surprisingly easy to grow as long as you provide them with well-drained soil and a spot in full sunlight. Jun 08 2020 Hardy hibiscus do best in medium to wet soil that drains well. If you are using a slow release fertilizer you will want to fertilize 4 times a year.