Due to a strong sunshine, especially in a really hot summer, watering schedule have to be continued through August too.
Carry on spraying your trees to prevent insects and pest, but it is time to change your balanced bonsai food to less nitrogen but more potassium and phosphorus-containing product to help to harden the wood and encourage the development of flower buds.
The best fertilizer for this purpose is a tomato fertilizer such as:
Product can be purchased by clicking on the picture
Check the wires on your trees as the branches start to thicken during August. Wire what starts to bite in the wood should be removed and reapply if it’s necessary.