Hardy Annuals are herbaceous plants that live for just one year; they will die after flowering and setting seed and should then be composted.
Care: Hardy Annuals can stand the cold so seeds are sown outdoors in Spring to flower during early Summer and it is important that the soil is not too rich or it will encourage leafy growth instead of lots of flowers.
If buying plants during Spring clear the ground of all weeds and keep them well watered. Add plenty of well-rotted organic matter when planting and stake tall plants.
Deadheading regularly throughout the growing season will encourage more flowers although you may want to leave some flowers to allow them self-seed around the garden and save you some work.
In autumn once the plants begin to die down pull them up and put on the compost heap.