Parsley is adaptable, growing in full sun to semi-shade. However in full sun it will need more frequent watering. A position with morning sun and afternoon shade would be ideal. It will also be happy on a sunny kitchen windowsill.
Water & humidity
Parsley can be a thirsty plants and doesn't like to dry out completely. Water deeply once the top 1-2cm of soil is dry. Its leaves will wilt when it needs a drink.