West Sussex,
United Kingdom 
Re Camellia - photos attached - advice req'd. if plant is still viable? - is 15-20 years old - approx 7 ft tall - last fowered March/April 2024 - blooms drop-off very early - leaves - browning - looking rather tired! comments/advice welcome
John S.
12 Jul, 2024
Answers
The lack of nutrients is the cause of the yellowing of the leaves. Feed with an acid-loving fertiliser like Miracle-Gro Azalea, Camellia & Rhododendron Soluble Plant Food. As far as the flower drop, the buds are fixed in late summer of the previous year so a feed of potash (tomato feed will do if you have some at hand) should help.
12 Jul, 2024
I agree with the advice above.
12 Jul, 2024
Hungry, chlorotic. Feed with specialist acid loving plant feed.
12 Jul, 2024