I recently purchased a tropical hibiscus and it had flowers and buds. I want to know if after the flower drops off, should I pinch back the end?
You can, but it is not necessary.
I'm looking after my neighbors tropical hibiscus which she transplanted into a bigger pot last November. This plant is in a glass roofed sunroom and I been noticing in the last month the leaves have turned brittle and have nearly all fallen off. I realise the extreme cold winter weather is not a favorite of this tropical plant. I tested a small branch and it is not dead, even though it looks like it is. My question is what can I do too help this plant recover, or will it die because of the freezing temperatures?
I believe the following article addresses your question: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-leaf-drop.htm
My tropical hibiscus has several branches growing from the main trunk. Are these considered suckers and should I trim them or are these a good thing? I just got the plant this year and besides a few yellow leaves it seems pretty healthy.
Without a photo we can only guess and generalize.
Branches growing from the main trunk are not necessarily suckers, and may be just natural branching that should be preserved and not removed.
If you mean that there are multiple shoots coming up from the same area at the low point just above the soil level, then those might be considered suckers, and maybe they should be thinned or removed.
One photo is next to an Advil bottle so you can see how large they get
Unless you have the tag from where it came from or know who planted it, it may be difficult if not impossible to find the exact cultivar. The only thing that we can pin down is that it is a tropical variety. They are the only type that can flower orange, like this.
Here is an article that will help you with their care: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-container-care.htm
I have 5 that I would like to save, but don't have a sunny area in which to put them. Can they go dormant in a basement that is about 60 degrees in winter? Thank you.
It sounds like your basement will work fine as far as the temperature goes. The hibiscuses may look a bit rough when they come out in the spring. Here's an article with info for you:
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/wintering-hibiscus-indoors-winter-care-for-hibiscus.htm
I live in South Florida.
It could be thrips or gall midges inside the buds. These articles tell more and how to control them.
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/pests-on-hibiscus-plants.htm
ibiscus Indoors but have some questions. I'd like to keep the tree in the basement and have it go dormant. How do I best do tha t? Should I cut it back before I take it to the basement or wait until the spring? I live outside of Buffalo, NY. I overwintered this tree last year and it really looked sad by spring. It took months to get it back to its prior year's beauty. It literally just started blooming last week.
I have not had success with that. They are tropical plants that require >6 hrs of sun to produce enough food for the roots but they do not hoard enough in winter to survive long, dark winters. Can you try putting it in a south facing window with some light instead?