Buds and tips of branches have white crust on them. These plants are in big pots.
This could be an insect infestation with scale insects. Mealybugs and anow scale are two types of scale insect that can attack hibiscus. See these articles for help:
https://www.gardeningknowhow.com/plant-problems/pests/insects/control-plant-scale.htm
http://garden.org/nga/searchqa/answer/85344/
http://www.extento.hawaii.edu/kbase/crop/type/p_strach.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/mealybugs-control.htm
http://entnemdept.ufl.edu/creatures/orn/mealybug/mealybug.htm
I bought a gorgeous one in the spring, had it on the patio all summer then brought it into the sun porch (unheated) and it was still absolutely stunning. I moved it into the living room once the temps started to drop, and it did well for about two weeks. A few days ago, its leaves started turning brown and dropping like crazy. It truly looks like it's dying and I don't know what to do about it. Someone told me to put it in the heated basement and "ignore" it for the winter. I'd truly appreciate your advice! Thanks so much in advance.
It is very common for hibiscus and other plants brought indoors to lose some leaves (or a lot of leaves) due to the lower light levels indoors. It will still be happier in your living room than in your basement; in fact the more natural and/or artificial light you can give it, the happier it will be. If it does lose all its leaves, then you can let it go dormant in a cool room by stopping watering.
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/wintering-hibiscus-indoors-winter-care-for-hibiscus.htm
https://www.ext.nodak.edu/extnews/hortiscope/flowers/hibiscus.htm
My hibiscus has stopped blooming. It has many buds ready to open but have not done so. I have never had this happen with hibiscus before. It is in a container on my open balcony. Any treatment suggestions?
This is a common problem with hibiscus, and the plants seem to show this behavior whenever they are under stress. Make sure the watering schedule, light level, and temperature ae adequate. Also check the plant for the pests mentioned in this article:
I am trying to care for a beautiful Hibiscus plant. I have had it all summer. All of the leaves have fallen off but it is still blooming and a few buds of leaves seem to be coming out. What is wrong? Can I prune it?
During the summer, the twisted hibiscus tree can be placed outdoors as long as temperatures remain below 95 degrees Fahrenheit. Hidden Valley Hibiscus states that in temperatures over 95 degrees, the twisted hibiscus tree loses flowers but doesn't die. The plant can live in temperatures well over 100 degrees Fahrenheit successfully, although the tree may not flower in very hot temperatures. The twisted hibiscus tree needs to be placed indoors during the winter months in most regions. According to Hidden Valley Hibiscus, the tree can die within a few hours if it's outdoors when temperatures fall to 32 degrees Fahrenheit or lower. The twisted hibiscus tree also needs less water in the winter to prevent damage to the roots of the tree.I have some good work experience with a OOH ERP and my words are clearly based on what I felt through such processes in the past. http://www.platooh.com
Plant has yellow leaves and other leaves are beginning to color. Healthy looking green leaves at end of branches. A few red blossoms. Have applied a general fertilizer and water regularly.
This article will help you:
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/answers-to-what-causes-hibiscus-leaves-turning-yellow.htm
I live in a suburb of Houston,TX. I want to cut a limb off my hibiscus and rather than throw it away, I'd like to try to root it. It's a hardwood. What should I do and what kind of soil should I use? Should I bring it in or leave it outside?
Taking a smaller cutting from the limb and growing it indoors is the best way to do this. This article explains how:
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-propagation.htm
I don't actually have a question; I have a comment! We have a hardy hibiscus (rose mallow) that has thrived for about 20 years. It comes back every year bigger and just oh so beautiful. Your article says it grows to 4 feet tall. Mine grows to about 6 feet tall! People walk by and compliment us on our beautiful plant and ask "what kind of a flower is that?" and when I tell them it is a hibiscus, they are so amazed and say "Isn't that a tropical plant?" Last summer, I harvested a few seed pods and planted them in pots in the house and was so amazed that I got these little plants coming up. I got them transplanted outside in the late summer. I am so excited to see if they will come up this summer. If they do, I am going to share them with friends and co-workers. I am SO excited!!
What a beautiful plant! As to the height of 4 feet, this is merely an average for these plants. Obviously, with good care, they can grow much bigger. And you no doubt have that special touch. Thumb's up! :)
Thos flowers look beautiful! Yes, rose mallow is a great plant and it does bring a tropical look to temperate gardens.