I have 2 very large camellia bushes, which are about 15 years old. The soil is very sandy and they are full of flowers and buds, but the camellia bushes have started with yellow leaves.
Your Camellias may need fertilizing. Please read the articles below.
https://www.gardeningknowhow.com/ornamental/flowers/camellia/camellia-fertilizer-info.htm
I have a large camellia bush that always has lots of buds but they never open. I have had the bush for many years. Every year it is loaded with buds that never bloom.
Was your camellia grown from seed? Camellia seedlings can be a challenge to gardeners as they take several years (6-8 years) to bloom.
What variety of camellia do you have? The variety you have may not be suited for your particular climate and thus will not open properly (or at all).
I would review the information in the following articles which discuss the reasons why camellia buds will not open. Hopefully one of the reasons will resonate with you and resolve your issue.
http://nwdistrict.ifas.ufl.edu/hort/2015/01/27/camellia-flowers-that-fail-to-open/
https://www.gardeningknowhow.com/ornamental/flowers/camellia/camellia-flowers-not-opening.htm
I would also review the article below, particularly the section “growing camellias” and make sure you are following all the plant requirements with regards to lighting, moisture and feeding.
I have a camellia that is in full bud and has been in a pot for some years. The last few weeks the leaves have started to curl and shrivel. How do I cure this?
Leaf curl can be caused by a number of things such as over watering (is the soil damp/soggy to the touch) or under watering is the soil dry to the touch), being root-bound (is the plant too small for its pot?), etc. Also - is this pot indoors or outdoors? If outdoors, is it possible it got injured by cold weather? Another possibility for leaf curl is herbicide injury caused by drift from any spraying that may have been done nearby.
Curled leaves can be a sign of an insect invasion. Inspect your camellia for any signs of insects. One possible culprit are aphids which suck juices from leaves which then curl and become distorted. More information on aphids and recommended treatments can be found here: https://www.gardeningknowhow.com/plant-problems/pests/insects/homemade-aphid-control.htm
I hope that helps.
My camellia bushes in front of the house look like they have mildew with black color on leaves. I want to know a solution on what I can do. =)
It sounds like your camellia has black sooty mold. This article will help you with that:
https://www.gardeningknowhow.com/ornamental/flowers/camellia/sooty-mold-on-camellia.htm
Unopened buds dying and flowers turn brown and drop off. I have seen a small insect with a tiny web. How can I treat it?
The presence of webbing suggests spider mites. For more information on spider mites and a course of treatment, please visit the following links:
https://www.gardeningknowhow.com/plant-problems/pests/insects/spider-mite-treatment.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/red-spider-mites.htm
Based on your description, I also wonder if perhaps your camellia may be suffering from petal blight as well which is a fungal disease that occurs in spring caused by an abundance of moisture. The bud drop would also be explained by an abundance of moisture.
For more information on petal blight and bud drop and a course of treatment, please visit the following link:
https://www.gardeningknowhow.com/ornamental/flowers/camellia/identifying-and-fixing-problems-with-camellias.htm
We have 2 very old camellias that are under an overhang on the southern exposure of our house. They haven't ever done well. My husband was painting and did a poor job of cutting all the plants that were in the way of his scaffolding. Now those 2 plants are looking terrible. Is there any way to save these 2 camellias?
Here are some links that may help.
https://www.gardeningknowhow.com/ornamental/flowers/camellia/pruning-camellias-how-to-prune-a-camellia-plant.htm
https://www.gardeningknowhow.com/ornamental/flowers/camellia/camellia-fertilizer-info.htm
After our cold temperatures during late winter and early spring, the leaves on the southern side of our camellia turned brown. This tree does not get any direct sunlight. It has been in this location for 10 years and the only thing different was harsher than normal winter. We didn't have much snow--just cold and ice. When do I prune off the dead leaves and branches? Should I be feeding it?
It does sound as if your Camellia suffered winter burn.
Below is a few great articles to help you.
https://www.gardeningknowhow.com/ornamental/flowers/camellia/pruning-camellias-how-to-prune-a-camellia-plant.htm
https://www.gardeningknowhow.com/ornamental/flowers/camellia/camellia-cold-damage.htm
https://www.gardeningknowhow.com/ornamental/flowers/camellia/camellia-fertilizer-info.htm