Yellowing spots and holes in fan leaves

Insects are doing that kind of holes , can be a catterpilar or anything else so check under the leaves , from what I can see it will not be a tiny bug but something that wou'll be abble to manage without adding anything ( just remove the bugs )

Hi @Dico29 I can't see well if it is septoria but if it is The first step to effectively dealing with leaf septoria is removing infected leaves. If caught early, you can usually prevent the spread of the disease by simply removing all infected lower leaves and burning / destroying them. However, if the disease has spread to the height of your flowers, you’ll generally want to skip this step. Removing foliage from flowering areas will greatly weaken a plant and reduce the quality of its buds.you should give the plant a leaf bath with some preventive product, bio bizz leaf coat or canna cannacure to protect the leaves of your plant. outdoors you should always play it safe. good luck mate 🙏👍