I have had my camellias for 3 months and keep them in pots in the garden. They used to be in semi shade but I noticed the leaves turning yellow and moved them to a more sunny part of the garden. One of my camellias has now lost all its leaves and the other one still has yellowing of the leaves and they are also dropping. I used camellia soil and fertiliser when repotting after I first bought them, and they have only been replanted into bigger pots. I'm not sure what to do now as all the information online seems to conflict with one another. Also, I live in Western Australia and I'm not sure what websites are referring to what weather conditions. I would really apreciate some advice, as I love my plants but I'm still very inexperienced when it comes to gardening!
Yellowing leaves is an indication of plant stress, such as overwatering or pests. I would check the soil in your pots to make sure that it's not too moist. Also, check for any insect pests. For more information on what causes yellow leaves and to help pinpoint the cuase in yours, this article will help: https://www.gardeningknowhow.com/plant-problems/environmental/plant-leaves-turn-yellow.htm
The leaves on my 2 yr old Camellia have turned brown and dropped off. I believe it to be frost damaged. All that is left are brown buds. Is it dead, or can I do something to save it? It's a very sentimental plant. Thank you.
Most likely it will regrow come spring, at which time you can cut off the dead growth. This article should help: https://www.gardeningknowhow.com/plant-problems/environmental/tips-for-saving-cold-damaged-plants.htm
Camellias do not flower. Why?
Camellias often take their time when it comes to blooming, even healthy ones. Some varieties are prone to bullnosing as well (when buds refuse to open). This is often due to fluctuations in temperature or insufficient moisture. A lack of nutrients and poor drainage may also be factors. Phosphorus can often help with blooming issues. Try adding some bone meal to the soil around your plant and see fo this helps too.
Have a camellia garden with both Japonica and Sasanqua camellias all doing well. Have recently planted a new Sasanqua amongst these that is about 1 metre high and all the leaves are turning very brown. Can't find any trace of insects, etc. Thought recent hot spell might have burnt the leaves. Has small buds on which look okay. Do I remove leaves or do you think it is dying?
It may be suffering from transplant shock. This article will help you with that: https://www.gardeningknowhow.com/plant-problems/environmental/learn-how-to-avoid-and-repair-transplant-shock-in-plants.htm
I live in the Gulf Coast and my camellias get scale/mold on the underneath side of the leaf. When the plant stops blooming, is it ok to cut off all of the leaves?
Removing all the leaves will harm the plant. I would recommend treating the plant with neem oil. I have found it to be very effective against scale and it is also a fungicide so will take care of the mold. Here is more information: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm
My camellia leaves are just drying up and dying. Why?
If it's newly planted, then the problem could be transplant shock. This article will help you with that: https://www.gardeningknowhow.com/plant-problems/environmental/learn-how-to-avoid-and-repair-transplant-shock-in-plants.htm It could also be an issue with underwatering. Check the soil to see if it's too dry. Water should correct this. Also, if you've fertilized it recently, it could have been too much, though the leaves would likely drop as well. Finally, it could be a fungus. Treating the plant with a fungicide should help with this.
I have very large elderly camellias in my garden which have been a delight for many years. Three plants growing next to each other are are about 10 feet tall and 8 feet wide. The foliage on two of them is completely covered with a deposit which looks like soot. My local plant center tells me to wipe this off each leaf - totally impossible with such mature shrubs! Can you suggest any treatment or will I have to get someone to dig them out and dispose of them? I do not want this problem to spread to other camellias, especially the ones which I grew from seed.
This is called sooty mold, which more often than not is brought about by some type of pest, like aphid or mealy bug. I would recommend neem oil. We have found it to be very effective against these kinds of pests and will also help treat the sooty mold. These articles will explain more: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm, https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm