Bougainvillea will drop leaves if it's gotten too much water, not enough water, not enough sun or if your temperatures drop too low. Here are some tips:
https://www.gardeningknowhow.com/ornamental/vines/bougainvillea/bougainvillea-garden-care.htm
https://www.gardeningknowhow.com/ornamental/vines/bougainvillea/pruning-bougainvilleas.htm?utm_source=ReviveOldPost
How far away from a house foundation should you plant an Australian Bottle tree ? How tall do they grow? How long are the roots?
The best time to transplant bougainvillea is in spring before new growth begins. Only move up one container size. No need to be in a hurry to repot; they bloom best when potbound.
Here is info on bottle tree. I did some research and didn't find anything about invasive roots, however as a general rule, trees should be planted 15 feet from the house. It has only a few surface roots and a deep taproot. They can grow up to 50 feet and the canopy spreads with age. The only negative was the reference to dropped fruit is a litter problem and can damage bare feet and mowers.
https://www.gardeningknowhow.com/ornamental/trees/bottle-trees/growing-kurrajong-bottle-tree.htm
http://www.public.asu.edu/~camartin/plants/Plant%20html%20files/brachychitonpopulneus.html
I asked this gardening question months ago and NEVER received an answer! I hope one of your experts will answer my question this time!
I have searched the posts for your username, and could not find any previous question on the subject. I will answer it, here, though.
These plants are very particular. If any of the parameters are out of the range that it should be, the plant will fail to flower.
Generally, Watering issues, too much feed in the soil, and stress of any type will halt flowering. This article will go into more detail:
https://www.gardeningknowhow.com/ornamental/vines/bougainvillea/bougainvillea-not-blooming.htm
I am not sure where to prune plant and how much. It is still blooming and has buds. Thank you
Generally, trim to keep the form that you wish it to have or if it has grown "too much" for your indoor winter location. Usually, that does not mean major pruning. If you are happy with the way it looks and it is not too big for the inside of your home, just leave it alone too.
https://www.gardeningknowhow.com/ornamental/vines/bougainvillea/pruning-bougainvilleas.htm
https://www.gardeningknowhow.com/ornamental/vines/bougainvillea/bougainvillea-pruning.htm
I really need help. My potted bougainvillea was growing beautifully with lovely foliage. All of a sudden the leaves are drying out, crumpling and dying, a slow but inexorable process. It gets plenty of sun and I dont overwater or fertilise it. There are no other signs of disease or pests.
Unfortunately, without photos it would be hard to say. Unfortunately, though, it sounds like overwatering or wet and heavy soils.
They will not tolerate clay soils, heavy soils, or moist soils, for that matter. They enjoy a thorough dry out between waterings.
In the meantime, this article will help you to know what care these plants need:
https://www.gardeningknowhow.com/ornamental/vines/bougainvillea/bougainvillea-garden-care.htm
Bougainvillea plants in hanging pots.
Likely, you will have to catch whatever it is, in the act! Until you do, you will need to guess and keep trying. Likely, it is some insect or flying animal. This collection of articles will offer suggestions on controlling insects of many sorts:
https://www.gardeningknowhow.com/plant-problems/pests/pesticides
This article will offer some suggestions on the care of your Bougainvillea:
https://www.gardeningknowhow.com/ornamental/vines/bougainvillea/bougainvillea-garden-care.htm
Do Bougainvillea have suckers coming off their main stem?
It sends off new green growth from the woody stems. But I wouldn't call those suckers. You can pinch those back for a bushier look. You can prune off any dead wood in fall or early spring.
https://www.gardeningknowhow.com/ornamental/vines/bougainvillea/bougainvillea-garden-care.htm
https://www.gardeningknowhow.com/ornamental/vines/bougainvillea/bougainvillea-pruning.htm
https://www.gardeningknowhow.com/ornamental/vines/bougainvillea/bougainvillea-garden-care.htm