Petunia native to South America, because of its low plant (20 cm to 40 cm), the name of the flower is like a cow, in fact, it and the morning glory is not the same family of flowers, Petunia is Solanaceae, Bi An annual or perennial herb is produced in winter solanum, while morning glory is a year-old twine rattan flower of the genus Convolvulaceae. Petunia stem erect, the whole plant has viscous hairs above and below, leaves alternate, young leaves slightly opposite, ovate, entire, few sessile, flowers solitary at leaf axils or terminal, calyx calyx, corolla funnel-shaped, Some petals are corrugated and have many colors. They are red, purple, pink, orange, purple, blue, white, and complex colors. They are colorful and very beautiful. The natural flowering period is long (from April to November). In winter, if you can maintain room temperature above 15°C, you can enjoy flowers throughout the year. It can be planted in flower beds, and it should be planted in pots to beautify the balcony. , it is deeply loved by people. Home potted petunias points are as follows: First, the basin should be transparent slightly larger, the soil should be slightly acidic. Petunias should be planted in earthenware pots with good permeability and inner diameter of 20 cm to 30 cm. Two or three plants per pot, such as those with less transparent zirconia pots, plastic pots and porcelain pots, can be grown in pots. Put a layer of crushed charcoal or broken hard plastic foam blocks at the bottom to enhance the ventilation and drainage and prevent rot. It can also be planted with plastic hanging pots (1 pot per pot), hanging on the balcony or window. In order to use the loose and fertile slightly acidic sandy loam, the best cultivation method is to use hibitor leaf, vegetable garden topsoil, sand or perlite to prepare the culture soil in a ratio of 5:4:1. The pH is preferably between 5.8 and 6.2. A pH of more than 6.6 inhibits the iron uptake by the root and leads to yellowing of the leaves. Avoid heavy clay and saline-alkali soil. Second, seeding and cutting are easy to reproduce, and pruning and cutting are more. Petunia is generally used for sowing and breeding. Spring sowing begins in summer and autumn, and autumn sowing begins in winter and spring. The seeds are very small, first mixed with fine soil, should be diluted when broadcast, after sowing covered glass or plastic film, home semi-shady place, often spray moisturizing, 18 °C to 24 °C a week can emerge, remove the glass, seedling height 2 Transplanting once in centimeters, when the seedling height is about 8 centimeters, it will be planted in the pot, and the heart will be picked to promote its branching, and then the heart will be picked again two or three times to make the plant low, with many branches and flowers. The branches that are removed can be used for cutting propagation, first use chopsticks to make a hole in plain soil, insert it into compaction, set a half shade, and often spray water to moisturize. In the spring and autumn, 10 days to 15 days, rooting can take place. Can be planted in pots from 10 days to 15 days, and the survival rate is low in summer. The winter cuttings must be covered with plastic film. After petunia flowering, each species chose to retain a few flowers for seeding, and the rest of the flowers were cut or cut short, promoting more branches and more flowers. Third, water moderate drought protection, fertilizer, phosphorus and potassium less nitrogen. Petunia hi moist, afraid of drought and fear of quagmire, spring, summer and autumn seasons often watering, see the basin soil is dry, always keep slightly wet, but it must not be waterlogging, easy to rot, too dry, too dry Easy to yellow leaves, pelvic soil in winter can be slightly moist. When watering in the north, add ferrous sulfate (500:1) to the water to prevent long-term alkaline water pouring, alkaline alkalinization, and poor yellow leaf growth. Petunia likes fertilizer, but also resistant to barren, such as excessive fertilization too busy, easy to grow but spend less. When planting or turning pots and changing soil, add bone powder or NPK fertilizer as base fertilizer in the culture soil. Apply a thin nitrogen fertilizer at the seedling stage for about 10 days. Do not apply nitrogen fertilizer to the flowering stage at the bud stage. With less flowers, NPK fertilizer should be applied for 15 days or so. A 0.2% potassium dihydrogen phosphate solution should be sprayed once a month to the leaves to promote more precocious buds, more flowers and brighter colors, and no fertilizer in winter. Fourth, the sunshine is abundant and luxuriant, and winter sees more light. Petunia hi light, hi warm, not cold. The most suitable growth temperature is 15°C to 25°C. Except for midday high temperature (above 34°C), the shade should be properly shaded at noon. In the rest of the season, sunshine should be more common. The more abundant the sunshine, the more flourishing the growth, the more flowers, and the better. Yu Xiang courtyard, roof garden, south or west balcony, windowsill. Before and after the frost fall into the room to be placed in the south or west to the windowsill more see the sun, keep the room temperature above 2 °C can safely winter, more than 10 °C can continue to grow, more than 15 °C can bloom. Before and after the Qingchun Qingming out of the room, the soil was re-cut after turning the pots, and a thin nitrogen fertiliser was applied once or twice to restore its growth and blossom. After two wintering old strains, the growing trend is waning, which can be eliminated in the autumn and the seedlings that were planted in the spring and autumn of the year will be replaced.
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