Can they be split into separate plants?
You would be better off creating new plants from cuttings that can be taken from new growth or branches that have not yet matured. The root ball needs to remain intact for the most part, so it's not recommended that you split it. These articles may help you:
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-propagation.htm
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-propagation.htm
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/transplanting-hibiscus.htm
Bought (2) hibiscus plants 2 weeks ago when it was in the 80's and 90's. Could not get my landscaper over quick enough to plant these plants, so they were exposed a couple of days. Got watered twice daily but still dried up a bit and turned yellow. Are they still okay and will they service? What should I do now? Cannot send you a picture, sorry.
As long as the branches are still pliable, they should recover. But it will take them a bit to recover to their full beauty. How long will depend on how much damage occurred.
I have two tall hibiscus trees, I would like to trim them back while they are outdoors for the summer. When is a good time to cut them back and how do you you were to cut?
Here is a link that will help you.
Why do the buds on my Hibiscus fall off before they bloom?
This link will help you pinpoint the causes.
My husband and I planted our first plant, a hibiscus, in 2012 at our first home. In 2013 it came to our second home. We plan to move hopefully within the next year or two but our hibiscus has grown a lot since first getting it. I don't want to leave it behind because it has a lot of meaning to me and my husband. It reminds us of how we first started out. Is there any way I can transport it? I'm sure the roots are huge by now.
This link will help you with the move of your Hibiscus.
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/transplanting-hibiscus.htm
I have a beautiful hibiscus tree that is probably 12 to 15 years old and doing well. However, the past two years the flowers have become less and less. Also, I noted more yellowish leaves (iron depletion?). I am not sure what to use to get this tree in better shape. The tree receives full sun and is watered 3 times a week now.
Yellow leave can indicate that there is an iron issue, but I would think that overall the plant likely just needs some general fertilizer. If possible, have the soil at the base of the plant tested and then, if the test confirms a nutrient deficiency, add some balanced organic or chemical fertilizer to the soil as far out as the drip line of the plant.
These articles should help:
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-fertilizing.htm
I have three Hibiscus plants that were beautiful when I got them, but now the leaves are turning yellow. Am I watering them too much? Every day I break off yellow leaves some days as much as 12 leaves. Thank you.
The soil should be moist, but never soggy. When the top inch or so of soil dries out, then watering again--throughly.
Make sure you water so the entire root ball is watered and excess water drains from the container.
On warm dry days, you may need to water twice a day.
Yellowing leaves can be caused by a few other things, so the article below will help you.