Hello,
The wasps, in summer, are attracted by the same things as us. If your terrace is facing south, which is often the case, you are where they will be. In the spring, they are too busy building nests to annoy you.
By cons in the summer, they seek to recover their strength and are in search of sugar (nectar, meat juice, resin, ...) for their offspring.
If you have a south-facing meal with meat, sweet drinks, all in a flowery setting, do not complain about their presence because you send them a beautiful invitation.
They can also invite you at home because in summer, they are hungry and bulimic.
Some plants repel them including forsythias, tomato leaves, eucalyptus, and certainly many others but these solutions are never a panacea.
Attracting them is the most effective technique. They are voracious because their summer meal is crucial.
If you have a compost (often far from home), offer them a mini-ecosystem around which will delight them because once sated, they will return to the nest without step on your table.
One method that has really proven itself is to ally with them rather than counter them because, in addition, they can be of great service to you. For example, they cause a population drop in small insects wrongly called "parasites" in the spring. The best anti-chip there is.
The best is to analyze the entire food chain from the wasps and replenish this ecosystem away from your terrace. They will have no other reason to approach you than to thank you.
"If you are not careful, the newspapers will eventually make you hate the oppressed and the oppressors worship. "
Malcolm X
