0 1 Petunia is a perennial herbaceous flower of Petunia in Solanaceae. Originated in South America, it has rich colors, long flowering period, concentrated flowering period and diverse varieties, including large flowers, medium flowers, small flowers, double petals, single petals and upright branches. The overall effect is excellent and the adaptability is strong, so it is a good material for garden flower beds and courtyard greening. Our base has bred red, pink, blue and white varieties through heterosis breeding.
Cultivation points: Petunia seeds are small, so it is necessary to choose fine substrates, such as vermiculite, fine sand, or the mixture of these two substrates and pine needle soil; Wet the prepared seedling tray with water, evenly spread the mixture of seeds and fine sandy soil on the surface, gently spray a layer of water with a small watering can after covering the soil, and cover it tightly with plastic sheets after sowing until germination; The soil temperature was kept at 22℃-24℃ for the first few days. If the temperature is higher than 25℃, it will cause thermal dormancy; Keep it at18℃-23℃ from now on; The pH value of the soil is 5.5-6.0; Seed germination needs light, and it will come out in about 10 days.
When the seedlings grow to 5-6 leaves, they can be transplanted. The matrix can be mixed with sandy soil and pine needle soil at the ratio of 3: 1, and organic fertilizer can be added as base fertilizer.
The container can be11x11cm plastic nutrition bowl. At this time, the night temperature should not be lower than 10℃. Use compound fertilizer or switch to chemical fertilizer once every other week. Transplanting 1 month or so, you can officially enter the pot. Cultivation management after being put in pots: choose pottery pots or plastic pots of about 25 cm. Sandy soil and pine needle soil with a soil matrix of 3∶ 1 are mixed with a proper amount of decomposed organic fertilizer, and the soil pH value is 5.5-6.0; The frequency and intensity of fertilization affect flowering habits, and compound fertilizer is applied every 7- 10 days. Excessive nitrogen fertilizer and high temperature will cause plants to grow in vain. In the first six weeks after transplanting, the night temperature of 13℃ is helpful to the development of flower buds, and the ground temperature of 15℃ and the light of 13.5 hours are necessary for flowering. The night temperature of 65438 05℃ in the later stage can promote the compactness of plants and increase the base branches. Petunia is a long-day plant, so it needs light supply in weak light area. The height can be controlled by using growth regulator B-9 B-9 2500-5000PPM. Early bud removal can promote plant branching. Petunia is not easy to get sick, but it is easy to be harmed by slugs, so it can be controlled by applying granular iron in flower pots.
Petunia F 1-02 10 rose, flower diameter 8-9cm, plant height 20cm, crown width 40cm, compact plant type, large flower amount, long flowering period, rain resistance and strong stress resistance, which is an excellent material for flower beds all year round.
Petunia is a solanaceae plant, which likes light and fat. It can bloom continuously above 15℃ and is suitable for greening and beautifying family balconies, courtyards and streets. The biggest feature of hanging Petunia is hanging, which grows fast and branches strongly, and the hanging length can reach 2 meters. The cultivation techniques are introduced as follows:
1. Substrate preparation The common seedling substrates are mainly composed of peat, vermiculite and perlite, and a certain amount of pH regulator, trace elements and wetting agent are added. You can also directly purchase the professionally produced seedling substrate.
Second, the seeds should be stored in a cool and dry environment after being bought, and then opened when sowing. Seeds should be sown immediately after opening, and it is easy to absorb moisture when the seeds are placed for a long time, which leads to the decline of germination rate. Choose No.200 or No.288 seedling tray. After the substrate is put in, gently spray water to make the substrate fully wet and slightly concave, and sow a seed in each hole. Spray water after sowing, don't water it with water, and don't cover the seeds with matrix or vermiculite to keep the seeds bare.
3. After germination and sowing, put the plug into the germination chamber to accelerate germination. If there is no germination accelerating equipment, it can be covered with agricultural plastic film non-woven fabric, and the humidity is kept at 100%. Germination is accelerated at 22 ~ 24℃, and seed germination needs light. In general, seeds germinate in 6 to 7 days, and the mulch should be removed immediately after germination. Fourth, seedling management When the two true leaves of the seedling are green, start foliar fertilization, the initial concentration should be smaller (such as 75 ppm nitrogen), and then gradually increase the concentration, and it is best to apply total element fertilizer. Water should be sprayed in time at seedling stage, and the frequency of water spraying should be gradually reduced, and then watered when it is dry and wet. If the temperature and humidity of seedlings are too high, fungicides should be sprayed to prevent the occurrence of damping-off disease.
5. Transplant the seedlings when the root system of the seedlings is developed enough to be easily pulled out of the plug, move them into a small nutrition cup or a small plastic basin, or directly transplant them into a special basin for hanging baskets. According to the size of the pot, each pot can plant 1 to 5 plants. In this way, different specifications of hanging Petunia can be obtained in a short time.
6. Management Under the condition of sufficient light, the branches can bloom when they are about 10 cm long. The amount of nitrogen fertilizer should be reduced and the amount of phosphorus and potassium fertilizer should be increased at flowering stage. Pay attention to the following points in the production process: timely shaping If the branches are few and grow fast, the flower basket will not be full, and it should be trimmed in time. When Petunia grows to 15 to 20, it can grow by hanging. Old branches should be pruned in time to regenerate them. Pest Petunia The common pests are whitefly and liriomyza sativae, so it is very important to control them in time. Leaf miner can be controlled by trichlorfon. Aphids and chlorpyrifos can control whiteflies. Disease Petunia has strong disease resistance and is generally disease-free, but excessive watering can make it aging or root rot and die. Excessive drought will lead to the drying and aging of plant leaves and the death of old leaves. When the fertility is insufficient, it will also cause the leaves to turn yellow, the leaves to become smaller, the flowers to become less, and the color to become lighter. If plants are maintained for too long, or cultivated with their own cuttings, if the leaves of plants become smaller, it is likely to be caused by viruses. Special reminder: Petunia likes light, fat and drought, so it should be cultivated in sunny environment. In order to ensure that Petunia leaves are dark green and flowers are always in full bloom, fertilization should be carried out in time, and attention should be paid to cleaning up the old yellow leaves and removing the dead buds.