Flowers that complete the whole life cycle in the wild under natural conditions. ? 1. Annual flower: complete its life cycle of growth, development, flowering, fruiting and death within one year. Sowing in spring, flowering in summer and autumn, bearing fruit, and then dying. So it is also called spring sowing flowers. Such as cockscomb, cosmos, chrysanthemum, chrysanthemum, zinnia, marigold, malachite, dill, amaranth, chamomile, bougainvillea barbata, five-color grass okra, agastaches, impatiens and the like.

2. Biennial flowers: complete their life cycle of growth, development, flowering, fruiting and death within two years. That is, sowing in autumn, overwintering seedlings, flowering in spring and summer of the following year, and dying as a result, so it is also called autumn sowing flowers. Such as snapdragon, pansy, cinnamon, kale, calendula, daisy, bellflower, carnation, dwarf snow wheel, cornflower and so on. ?

3. Perennial flowers: refers to such flowers whose underground stems and roots grow year after year, and the above-ground parts blossom and bear fruit many times.

That is, its individual life span exceeds two years. Because of the different shapes of underground parts, they can be divided into two categories. ?

(1) Perennial flowers: the underground part is in normal shape, with no abnormality; The aboveground parts show annual or perennial characteristics, such as chrysanthemum, yarrow, aster, Coreopsis, perennial chrysanthemum, chrysanthemum, echinacea, Solidago, Paeonia lactiflora, Aconitum, aquilegia, clematis, Paeonia lactiflora, Abelmoschus manihot, phlox and cut flowers.

(2) Bulbous flowers: the roots or stems of underground parts are abnormal, and their hypertrophy is spherical or massive, such as tulip, hyacinthus orientalis, grape hyacinthus orientalis, Fritillaria, lily, jujube, onion, lily of the valley, colchicine, bletilla striata, narcissus, Lycoris radiata, leek, tuberose, gladiolus, iris bulbifera, spark, etc.

4. Aquatic flowers: refer to flowers that grow in water or marshland or are resistant to water and humidity. Common ones are lotus, water lily, erigeron breviscapus, Polygonum hydropiper, Pennisetum, Acorus calamus, Typha Typha, scallion, Eichhornia crassipes and so on.

5. Rock flowers: refer to flowers with strong drought tolerance and suitable for cultivation in rock gardens, such as Saxifraga, Corydalis, yarrow, Sedum, etc.

6. Lawn ground cover flowers: mainly refer to herbs covering the surface, Cyperaceae, other perennial herbs with strong adaptability, low shrubs, bamboos and vines with dense stems and leaves. Such as Zoysia japonica, Manila, Zoysia tenuifolia, Bermudagrass, Bermudagrass, Paradise Grass, centipede grass, Kentucky Bluegrass, Tall fescue, tall fescue, creeping cleavage (four seasons green), ryegrass, perennial ryegrass, white clover, red clover, horseshoe and so on.

(2) Greenhouse flowers

Flowers native to tropical, subtropical and warm areas in the south must be cultivated in greenhouses in cold areas in the north or protected in greenhouses in winter. Usually can be divided into the following categories.

1. Annual and biennial flowers: such as Guayeju, calceolaria, colored grass, primrose, etc.

2. Perennial flowers: such as African violet, Helan, Pogostemon cablin, Gerbera jamesonii, arrowroot with flowers and leaves, spider with eggs, etc.

3. Bulb flowers: such as cyclamen, vanilla, calla lily, Erythrina macrophylla, Bulb begonia, colored taro, etc.

4. Orchidaceae plants can be divided into terrestrial orchids according to their different ecological habits, such as orchids, orchids, orchids, orchids and so on. Epiphytic orchids: such as Cattleya, Phalaenopsis, Dendrobium, Paphiopedilum, etc.

5. succulent plants: refer to plants with special water storage capacity, which are stout, juicy and abnormal and can resist drought. Such as cactus, crab claw orchid, epiphyllum, aloe, green bell flower, raw stone flower, corn stone, dragon and phoenix wood, agave and so on.

6. Pteridophyte: also known as pteridophyte, such as Adiantum, Nephropterium, Nest Pteridophyte, Deer Pteridophyte, etc.

7. Insect-eating plants: such as pitcher plants, flycatchers and pitcher plants.

8. Bromeliaceae plants: such as color-leafed pineapple, tiger-striped pineapple, Phnom Penh pineapple, test-tube pineapple, etc.

9. Herbaceous woody plants: also known as semi-shrub flowers, such as upside-down golden bell, carnation, geranium, begonia and so on.

10. Flowers and trees: such as poinsettia, Dracaena, Dendrocalamus, Phyllanthus urinaria and Eupatorium odoratum.

1 1. Aquatic flowers: such as Wang Lian and tropical water lilies.