The five common camellia problems you're most likely to face are petal blight, bud drop, tea scale, root rot, and chlorosis. Most of these are easy to fix once you know what to look for. Your camellias will bounce back fast if you catch the issue early and take action right away.
I dealt with chlorosis on my own japonica about two years ago. The leaves turned yellow but the veins stayed green. It looked wrong and I had no clue what was happening at first. NC State Extension told me that yellow leaves with green veins mean chlorosis. I treated it with iron chelates mixed into the soil around the base. Within six weeks the new leaves came in dark green and healthy. I test my soil pH every spring now to make sure it stays acidic enough to prevent this from happening again.
Camellia petal blight is one of the most heartbreaking problems you'll face. Your blooms develop brown spots that spread fast and turn the whole flower into mush. A fungus in the soil causes it, and the spores live in fallen petals on the ground. The fix is simple but you have to stay on top of it. Pick up every fallen petal and throw them in the trash. Never put blighted flowers in your compost pile since the spores will survive and spread back to your plants next season.
Bud drop happens when your camellia sets buds but drops them before they open. Drought stress during August and September is the usual cause. Your plant builds its flower buds during late summer. If the soil dries out, those buds fall off before winter arrives. Sudden temp swings can do the same thing to your plants. I tested watering my camellias twice a week in August last year and kept every single bud on the plant. Give yours one inch of water per week during dry spells and you'll see far fewer dropped buds.
Camellia pests and diseases also include tea scale and root rot. Tea scale shows up as tiny white or brown bumps on the bottom side of your leaves. These pests suck the sap from your plant and cause yellow spots on top. Spray your plants with neem oil every two weeks until the scale is gone. Flip your leaves over and check the undersides each month to catch them early.
Root rot comes from wet, soggy soil that never drains well. If your camellia wilts even when the soil feels damp, root rot is the likely cause. You need to improve your drainage or move the plant to a raised bed with better soil. Mixing in perlite or coarse sand helps your soil drain faster and keeps your roots healthy all year long.
UF IFAS notes that magnesium lack is the most common issue for camellias in Florida. Your soil in that region tends to run low on this nutrient. A dose of Epsom salt mixed into the soil once a year helps prevent it. For the rest of the country, iron lack from high pH soil causes the most trouble. Test your soil every year and add sulfur if your pH climbs above 6.5 to keep your plants in the safe range.
Most common camellia problems come down to soil health and basic care. Check your drainage before you plant. Test your pH once a year. Water well in late summer. Pick up fallen blooms. These four habits will save you from 90% of the problems other camellia growers fight with every season. Your plants are tougher than you think when you give them the right foundation to grow on.
Read the full article: Camellia Flower: A Complete Guide
