These are the plants that complete their life cycle in one growing season. As their ultimate goal is to reproduce them self (by set seed).
Deadheading will prevent seed formation, thus, make the flower last longer.
Annual typically splitted into 3 groups:
- Hardy (or cool-season) annuals: grow in cool or moderate temperature like early spring and fall, can tolerate exposure to light frost.
- Tender (or warm-season ) annuals: require heat to grow, and grow poorly during cold weather. Best to plant in late spring.
- Half-hardy annuals: Tolerate a wide range of temperatures.