Introduction and culture methods of Persian chrysanthemum how to raise beautiful Persian chrysanthemum

Cosmos is a beautiful ornamental plant, relatively tall and sparse, large and beautiful flowers and strong vitality, can be planted in front of and behind the house, below, take a look at the relevant knowledge bar.

I. Introduction to cosmos

Cosmos is an annual herb, belonging to Compositae, Autumn Ying, also known as Autumn Ying, Big Autumn Cherry, Gesang Flower, Eight-petal Plum, Broomstick Plum. Cosmos, also known as Autumn Ying, Cosmos, originated in Mexico. Like light, bear barren soil, avoid fertilizer, soil is too fertile, avoid hot, avoid ponding, do not adapt to high temperature in summer, not cold. Loose, fertile and well drained loam is required. Compositae, autumn British. Herbs, slender stems erect, leaves simple and opposite, heads borne on slender pedicels, terminal or axillary. The central part of the flower disk occupied by cylindrical flowers is yellow. Achene rafters, seed life 3-4 years, dry grain weight 69. Flowering summer autumn.

II. Morphological characteristics of cosmos

Cosmos is an annual herb, plant height 30-120cm, thin stem erect, branched more, smooth stem or with micro-hair. Leaves simple, opposite, ca. 10 cm, bipinnately divided, lobes narrowly linear, entire edentate. Capitoles inserted on slender pedicels, terminal or axillary, flowering stems 5 - 8cm. Total package sheet 2 layers, inner edge film. Tongue flower 1 round, petal tip assumes tooth shape, petal 8, have white, pink, crimson. The central part of the flower disk occupied by cylindrical flowers is yellow.

3. Cultivation techniques of cosmos

Cosmos strong, like sunlight, drought resistance, soil requirements are not strict, but can not ponding. If it is planted in fertile soil, it is easy to cause excessive growth of branches and leaves, affecting flowering quality. Seedling height 5 cm that line transplant, leaves 7-8 when planting, can also be thinning after direct seeding. If the planting ground is applied with base fertilizer, no fertilizer is needed during the growth period. If the soil is too fertile, the branches and leaves are easy to grow and the flowering is reduced. Or apply 5 times the amount of decomposed urine every 10 days during growth. Dried days when irrigation 2-3 times water, that can grow, flowering well. 7-8 Bloomers are less likely to bear fruit during high temperatures. The seeds are easy to shed after maturity and should be harvested in the early morning. Cosmos is a short-term plant. Spring seedlings tend to have luxuriant leaves and few flowers. Summer seedlings are short, neat and flowering. It grows rapidly and can be removed several times to increase branching. Cosmos plant tall, planted in the windward should be set up pillars to prevent lodging and damage. Generally, more short plants are bred, that is, when the seedlings are 20-30cm high, the top is removed, and then the new terminal buds are removed several times in succession, and the plants can be dwarfed; at the same time, the number of flowers is increased. A little base fertilizer should be applied to the planting nursery. Seed picking is suitable for picking achenes when they become slightly black, so as not to scatter after maturity.

In late March and early April, seeds are sown in open seedbeds. Germination can occur even at a relatively low ground temperature of 15 ° C, but if sown early, it will grow into a giant plant 2m high, and it will easily lodge due to typhoons or plant weight. There are also early-blooming varieties that bloom 50-70 days after sowing, so they should be sown early and autumn. After the flowers and fruits are ripe, the cosmos plant dies and the seeds are automatically sown to continue life. It can also be harvested when the fruit is ripe, seeded in late March of the following year, and can bloom after 2 months. Cuttage propagation can also be selected, in May, you can select strong top branches, cut 8 cm to 10 cm long for cuttings, 3 to 5 plants for a cluster inserted in the flowerpot, the pot should be buried in the soil, exposed to the ground 4 cm to 5 cm, watering shade, half a month later that root. After rooting, thin fertilizer solution is applied once every 15 days, and when it grows to 15 cm, the terminal bud is picked again to promote multiple branches. If the fertilizer is properly controlled, flowers can be seen in about 45 days.

1. Notes:

1 Sowing in late July.

② After spring sowing, pick the heart when it grows to 40-50cm, and let the axillary buds bloom.

3. erect short bamboo and other pillars as soon as possible.

2. Preventing the lodging of cosmos:

(1) Sowing in July and August. Cosmos sown during this period can flower in October and the plants are short and neat.

2. Take the heart. During the growth period of cosmos, it needs to be picked many times, on the one hand, it can make the whole plant dwarf, on the other hand, it can also promote the germination of branches and increase the number of flowers.

3. Apply less fertilizer and water. Too much fertilizer and water easily lead to excessive growth of plants and lodging, and flowering sparsely.

The above is the knowledge of cosmos, I hope it can help you.