As camellias get older and bigger, they develop more and more buds throughout the plant. When the shrub gets real big, this bud production takes a lot of energy from the plant and the number of flowers increases as their size decreases. Pruning is required to correct this.
Unfortunately, severe pruning should be left for times when the plants are dormant, not for times when the temperatures are going to sizzle. Minor pruning here and there is ok at any time but is preferable before July.
Why? Well, camellias begin to develop flower buds in June-July, more or less. We are at the point when any type of pruning would affect next year's bloomage.
I have included a link below with pruning information that may be useful. You can also click on this link to contact the Aiken, South Carolina Camellia Society. Because of the age of those shrubs, you may also want to consult with them personally.
Regarding the yellowing of leaves, it may be normal. Evergeen leaves usually stay about 1-2 years. Old leaves in camellias are shed starting in late spring and early summer. My sasanquas are in the process of doing that now.
If you notice additional symptoms, post another message. Meanwhile, keep their soil moist (not wet). Water when it feels dry or almost dry; if not sure how to do this, insert a finger into the soil to a depth of 3-4". Maintain 3-4" of mulch and regularly check for pests on top and below the leaves. Fertilize monthly with cottonseed meal from spring thru early-to-mid summer. Cottonseed meal is an organic slow release fertilizer available in many cattle/feed stores, local & organic minded nurseries. Luis |
Here is a link that might be useful: Pruning and Disbudding of Camellias
