Give them full sun in winter and spring and avoid afternoon sun in summer. They prefer cool temperatures. Allow them to dry slightly between waterings. They are sensitive to over-watering and like average to low humidity. Fertilize them every two weeks.
Primroses can bloom for several weeks.
This type of primrose is an annual and will not re-bloom. Geraniums need full sun or very strong light. They tolerate a wide range of temperatures. Keep them a little on the dry side, especially when not in bloom. They tolerate average humidity.