1. Annual flowers.
A plant that completes its life cycle during the growing season. That is, from sowing to flowering, fruiting and dying are all completed in one growing season. Generally, spring sowing, summer and autumn growth, flowering and fruiting, and then withering, so annual flowers are also called spring sowing flowers. Such as impatiens, cockscomb, zinnia, Scutellaria barbata, marigold and so on.
2. Biennial flowers.
Flowers that complete their life cycle in two growing seasons. In those days, only vegetative organs grew, but after years, they blossomed, bore fruit and died. This kind of flower is usually sown in autumn and blooms in the following spring. Therefore, this kind of flower is often called autumn sowing flower. Such as colored carnations, violets, kale, chrysanthemums, etc.
3. Perennial flowers.
Individuals who live for more than two years can blossom and bear fruit many times. According to the morphological changes of underground parts, they can be divided into two categories:
(1) Perennial flowers: the underground part is normal in shape and does not deteriorate. Such as peony, Hosta, Hemerocallis, etc.
⑵ Bulb flower: The underground part is abnormal and hypertrophy.