The four Eisheiligen names Bonifatius, Pankratius, Servatius and Sophie are calendar from May 12th to 15th. Only after this time should you flowersthat hibernated in the basement or in the greenhouse.
Because up to these days there is still a risk of night frost. After that, it may still happen, but that's no longer the case in most German regions. So the flowers can get out. But don't just put it in the garden or on the terrace.
Avoid blazing sun
There are also a few things to consider so that the plants can move. So they should not be placed in the blazing sun immediately, but should slowly get used to the sun in the shade or partial shade.
Don't forget to fertilize
You also have to fertilize them vigorously and finally cut off the dead branches and branches or stems that are too thin or too long are cut. The flowers survive the move perfectly and delight the gardener with new blooms.