【English Name】 Garden cosmos
【Family】Composite family
【Place of origin】Mexico
Flower Saying: happy forever
Gift flower etiquette: salad in a glass dish into the colors of the cosmos and put some grapes. Tie white and pink ribbons on the dish.
Its scientific name has beautiful cosmos and harmonious meaning. Originally it is the autumn flower which is the short-day plant, but now it has a lot of early flowering varieties, they are red, yellow, pink, white, and complex color. They are colorful.
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| Garden Cosmos |
Breeding methods
Seed or cuttings.
Cosmos by seed propagation. Generally early spring sowing, flowering in May and June, hot climate on August and September , more rain, less flowering. Cool autumn days and then continue to bloom until frost. If sown in July and August, then in October will be able to blossom, and the strains of short and neat. Sowing the seeds of a self-cosmos ability, once planted, the future will give birth to a large number of self-sowing seedlings, if a little protection, can bloom as usual. Available in mid-April in open beds broadcast, such as temperature suitable for about 6 to 7 days seedlings can be unearthed. Feasible cuttings during the growth period, under the section on the left and some robust scissor 15cm shoots, inserted in the sandy loam, the appropriate shade and keep the humidity, 5 to 6 days to take root.
April sowing, germination rapidly germinate 7-10 days after sowing. Softwood cuttings can also be used after inserting 15-18 natural roots.Transplant seedlings with 4-5 true leaves and topping can also be broadcast after thinning.Such as planting to impose basal, the growing season do not need to fertilize the soil if too fat, easy to leggy branches, flowering reduced. July-August period of flowering by high temperature is not easy to knot. Mature seeds easy to fall off, you should seed in the morning. Cosmos is a short-day plants, sowing seedlings tend to spend less leafy,summer-sown seedlings plant is short, neat, flowering continuously.
Cultivation and management
Cosmos of strong, likes the sun, drought-resistant, strict requirements on the soil, but not water. If it planted in the fertile soil, it can lead leggy branches, affecting flowering quality.Height 5 cm that line transplantation, leaves 7 - 8 when planting can also be broadcast after thinning. Such as planting to impose basal, the growing season do not need to fertilize the soil if too fat, easy to leggy branches, flowering reduced. Or every 10 days during the growing water decomposition applied five times the urine once. When drought pouring 2 to 3 times the water, that is able to grow, bloom well. July-August period of flowering by high temperature is not easy to knot. Mature seeds easy to fall off, you should seed in the morning. Cosmos said, according to the short plants, sowing seedlings tend to spend less leafy, summer-sown seedlings plant is short, neat, flowering continuously. Its rapid growth, topping multiple times to increase branching.
Cosmos tall plants, planting should be set at the windward pillar to prevent lodging and breakage. More generally bred dwarf trees plants, ie 20 ~ 30cm high when seedlings go to
the top, and then after several consecutive weeks of newborn bud removal, the plants can dwarf; also increased the number of flowers. Planting nursery should be slightly Fertilizers. Black seed is appropriate achenes slightly changed when picking, so ripe scattered.This species seedlings subject to short day treatment to normal flowering, should have the appropriate planting time; should be exposed to live, but also nursery; planting soil about 1cm, about 5-10 days of emergence; namely transplanting seedlings 5-6 true leaves, colonization from 30-50cm, topping the growing season to promote branching and control in order to avoid excessive late lodging. Strict requirements on the soil, but not water, not cold, avoid heat. Resistant infertile soil.
Maintenance points
Propagation: seed or cuttings. Can also make use of softwood cuttings in summer.Sown in late March early April, the seeds sown in the open field seedbed. In the lower ground temperature at 15 ℃ can germinate, but if sown very early, then the height 2m grow into a giant strains due to the weight of a typhoon or plants prone to lodging. Have been 50-70 days after sowing early flowering varieties open, so to points early on and fall off planting.
Management: hi warm and humid sunny, slightly resistant to early frost, soil strict. Height 5 cm that line transplantation, leaves 7 - 8 when planting. Strict requirements for fertilizer,every 10 days during the growing water decomposition applied five times the urine once. High school to be located before flowering varieties pillar to prevent hurricane lodging. Its rapid growth, topping multiple times to increase branching. Prone to spider mite damage when hot, should be early prevention. As late July to early August sowing, after 50 - 60 days to flowering, plant height and neat for the National Day use. Mature seeds, optional large Seyan inflorescence flower cut, dried seed.
Want to cultivate adult dwarf, not lodging cosmos, should take the following measures:
① In late July sowing.
② spring they grow to 40-50cm when the topping, so buds flowering.
③ dwarf bamboo pillar erected as soon as possible.
Disease and injury: Be sure to take to deal with mildew, aphids, spider mites response. Sprinkle on the mold benomyl against pests sprinkle granules or Tolan.
How to prevent cosmos lodging
Cosmos plant type is relatively high and sparse chic, spend big and beautiful, but often therefore appear lodging, big brake landscape. Lodging for the cosmos, you can take the following measures to prevent:
① July ~ August sowing. In the meantime you can sow cosmos October flowering and dwarf plants and neat.
② topping. The growing need of the cosmos repeatedly topping, one can make the entire dwarf the other hand, can also promote germination of branches increased number of flowers.
③ less fertilizing watering. Excessive fertilizer prone to produce leggy plants lodging, and blossom scarce.
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