What is the planting method of Petunia?

Morning glory is almost a necessity for flower shops, but most flower shops don't know how to grow morning glory. The following carefully recommend several methods of planting Petunia flowers, hoping to help you.

Petunia flower planting method 1, sowing: Petunia seeds are fine, so there is no need to cover the soil when sowing. Scatter the seeds on the surface of fine soil and spray water (don't water them directly, lest the seeds be washed deep into the soil) to let the seeds germinate. The optimum temperature for Petunia seed germination is 15-20℃. Generally, the temperature is lower than 10 degree, so it can't germinate, and indoor sunlight will also affect germination. The temperature is too low to germinate or grow slowly after germination. If the temperature is too high, the buds will rot easily.

Sowing can be done all year round in southern Guangdong. I broadcast it every 2-3 months, because I can keep bloom all year round. For plants that have been aging, even if I bloom again, I will still? Humanitarian destruction? . In order to keep the ornamental of balcony potted flowers. The substrate I use for sowing and planting is sandy soil mixed with commercial culture soil (1: 1). Spray water to keep the soil moist, but not too wet, otherwise the seeds will not germinate in the deep layer. According to the weather and temperature, seeds can germinate 5- 10 days after sowing.

2. When the seedlings grow 4-5 true leaves, they can be transplanted into large pots. Use 20 cm flowerpots, one for each flowerpot. The cauldron is also made of the above soil, but granular organic fertilizer and compound fertilizer are added as base fertilizer. Do not directly bask in the sun for the first few days after transplantation, and put it in a ventilated and cool place. The seedlings will grow new leaves in a few days. Under the condition of suitable temperature (15-25 degrees), it can grow very big in a month.

3. Petunia seedlings are very weak. Water should not be soaked too wet, otherwise it will rot easily, especially if it is too cold or too hot. Petunia likes dry and is afraid of wet. In the process of growth, it needs enough water, but it must not be watered too much. Don't water too much at seedling stage to make its root system developed. In this way, plants flourish.

4. At the initial stage of planting, the soil should be supplemented with sufficient base fertilizer. In the past, too much water was used at seedling stage, which led to rotten roots. After pulling up the plants, it was found that the roots were very underdeveloped. It is good to adopt the method of drought without waterlogging.

5. Dilute nitrogen fertilizer can be applied at this time. I usually dilute it with compound foliar fertilizer and urea and spray it on the leaves. The base fertilizer I use is organic mixed fertilizer (produced in Shenzhen), which contains chicken manure, bone meal, bean dregs and so on. Each pot used about 20-30 grams (estimated). I seldom use inorganic compound fertilizer. The leaves are a little yellow because of the lack of fertilizer. Apply dilute nitrogen fertilizer (urea, etc.). ), it is best to spray on the leaves.

6. When stamens appear, nitrogen fertilizer is not applied, and potassium dihydrogen phosphate solution is used to spray leaves instead. In this way, plants will not grow in vain, and there will be many stamens. After Petunia blooms, I spray a mixture of potassium dihydrogen phosphate and organic amino acid liquid fertilizer on the leaves every 7- 10 days. It is found that it has obvious effect on prolonging the flowering period and increasing the brightness of flowers. You can try. If the liquid concentration is not too high, it doesn't matter even if it is sprayed on flowers. The concentrations I sprayed were all below 0. 1%, and no effect was found on flowers.

7. about picking the heart. As long as the application of water and fertilizer is well controlled at seedling stage, the plants will naturally branch without topping. None of my petunias are top-notch. If the plant grows unevenly (for example, one branch grows fast and the other branch grows slowly), the plant type can also be controlled and adjusted by pinching.

Sowing methods and temperature conditions of Petunia.

The suitable temperature for Petunia to germinate smoothly is about 18-25℃, and the suitable temperature for further seed growth is about 22-34℃. Under normal circumstances, Petunia can germinate in 3-7 days. It is best for flower friends to create such a temperature environment when planting Petunia, otherwise it is unknown whether they can successfully breed healthy Petunia.

edaphic condition

In the selection of sowing soil, the mixed soil of high temperature sterilized culture soil, humus soil and fine sand can be used. After sowing, the seeds can germinate smoothly without covering the soil, which takes about 5-7 days.

Humidity condition

Before sowing, the seedling soil can be fully watered, and the seedling soil should be kept moist after sowing, so as to avoid being too dry and affecting normal germination.

Planting knowledge and seedling raising of morning glory: the germination temperature of morning glory seeds is 20 ~ 30℃, and it is usually planted at the end of April and the beginning of May (it can be advanced in the south), and it is planted in fine sand seedbeds according to varieties. When the humidity is moderate, it germinates for about 10 days. After about 10 days, the cotyledons will be completely open. When the real Ye Gang germinates, it should be transplanted into a small pot. Too early seedlings are weak, and too late roots are damaged, which is not conducive to future development. Small pots should be marked with varieties.

Planting: After the seedlings in the small pot grow two or three real leaves, the roots have developed, so they can be planted in the middle pot, and the base fertilizer can be added in advance. As teacher Mei said, morning glory is not afraid of heavy fertilizer, and you can use horseshoes and cooked hemp residue as base fertilizer. The root system development of morning glory needs temperature, so it is necessary to turn the pot frequently, let the sun shine evenly, and let the root system develop completely.

Picking: When the real leaves of morning glory grow three or four pieces, vines begin to grow in the center, so it should be picked at this time. After the first pit removal, branches and vines were born between the axils of leaves. After the branches and vines grow three or four leaves, the core is removed and combined with plastic surgery. Top dressing should be applied after each pit removal, and the fertilizer used is similar to that used by chrysanthemums. Be careful not to let fertilizer and soil pollute the leaves (including cotyledons) to avoid the leaves falling off. When vines grow, they will enter flowering period (usually one month after planting). Ideally, the first leaf of the vine will have axillary buds, and the second and third leaves will have flower buds in the axils. After the bud is formed, the stipules of the bud can be removed to facilitate the development of the bud. In order to ensure the full supply of nutrients to the flower buds and produce large and gorgeous flowers, we can also remove some flower buds and cultivate a single flower, just like cultivating a variety of chrysanthemums. After flowering, the residual flowers should be picked and not used as seeds, so as not to affect the nutrition of the next batch of flowers. Of course, after three or four batches of bloom, axillary buds are overgrown and difficult to control. General varieties can be planted in the field, and excellent varieties can stay at any time.

Keep seeds: Good varieties must keep good seeds. When autumn is ripe, take the seeds away and label them for preservation. If there are varieties, they should be kept. After selecting the female parent and the male parent, cut off the upper end of the bud at dusk the day before flowering, then remove the stamens and wrap them with wax paper. The next morning, take off the wax paper bag, pollinate it artificially with the stamens of the male parent, and then wrap it with wax paper. After a week or two, the wax paper package can be removed, but the pollination package must be marked and recorded. In the second year, all the hybrid seeds should be planted well, and the results can only be seen after flowering, so as to study the role of various genetic factors.