How to raise Petunia in potted Petunia cultivation methods and matters needing attention

Petunia is not the morning glory commonly known as petunia, it is a perennial herb of the genus Euphorbia. It has a long flowering period and bright flowers, so it is often used to decorate flower beds and other places. Now potted petunia is also more common, breeding methods are not very difficult, the following Xiaobian detailed introduction of petunia breeding methods and matters needing attention.

How to raise potted petunia

1. Selection of basin soil

The basin should be slightly too permeable, and the soil should be loose and slightly acidic. Petunia should be planted in clay pots with good permeability and inner diameter of 20 cm to 30 cm, with two or three plants in each basin. If planted in purple sand basin, plastic basin and porcelain basin with poor permeability, petunia can be planted with a layer of broken charcoal or hard plastic foam at the bottom of the basin to enhance air permeability and drainage and prevent rotting roots.

2. Water quantity control

Petunia likes to be wet and afraid of drought and waterlogging. It should be often watered in spring, summer and autumn, and it is better to keep the soil slightly moist when the pot soil is dry, but never waterlogging, too wet and rotting roots, too dry leaves are easy to yellow, and basin soil is not dry and slightly moist in winter. When watering in the north, it is advisable to add some ferrous sulfate (500glucon1) to the water to prevent long-term application with alkaline water, basinization of basin soil and poor growth of leaf yellow.

3. Fertilization management

Petunia like fertilizer, but also tolerate barren, such as too much fertilization too often, easy to grow and spend less. When planting or turning the basin to change the soil, you can add some bone powder or nitrogen, phosphorus and potassium compound fertilizer as the base fertilizer in the culture soil, apply a light nitrogen fertilizer about 10 days in the seedling stage, and no more nitrogen fertilizer in the bud flowering stage, otherwise it is easy to grow and lodge, and the leaves have more flowers. It is appropriate to apply nitrogen, phosphorus and potassium compound fertilizer, which is sprayed on the leaf surface once a month once a month. 0.2% potassium dihydrogen phosphate solution is sprayed to the leaf surface once a month to promote its multi-pregnant buds, flowers are more and more beautiful, and no fertilizer is applied in winter.

4. Lighting

There is plenty of sunshine and luxuriant flowers, and there is more light when you enter the house in winter. Petunia likes light, warmth and is not resistant to cold. The most suitable growth temperature is 15 ℃ to 25 ℃, except for the midsummer high temperature (more than 34 ℃) at noon, the sun should be seen more in other seasons, and the more sunshine, the more luxuriant the growth, the more flowers, should be placed in the sunny courtyard, roof garden, south or west balcony, windowsill.

Culture methods and matters needing attention of Petunia

I. Culture methods

1. Sowing and breeding. Petunia is often cultivated once a year. The sowing time depends on the time on the market, and the actual sowing time should be adjusted according to different varieties. The seeds of Petunia are small, with 9000-10000 seeds per gram and the optimum temperature for germination is 20-22 ℃. The seeds are sown in pot and sterilized with high temperature culture soil, rotten leaf soil and fine sand mixed soil. There is no need to cover the soil after sowing, it can be lightly pressed, and it will germinate in about 10 days.

2. Cuttage culture. Indoor cultivation can be carried out all the year round. After anthesis, the germinated tip shoots are cut, 10cm is grown, inserted into the sand bed, the soil temperature is 20-25 ℃, rooting takes place 15-20 days after planting, and it can be transplanted into the pot in 30 days.

3. Tissue culture. Explants use seeds, leaves and sperm-receiving rooms. Under sterile conditions, soak in 75% alcohol for 8 minutes, then soak in 0.1% mercuric chloride solution for 7 minutes, rinse with sterile water, inoculate on MS medium, and bud appear after 15 days.

When the small buds were cut and transferred to the original medium for subculture, more than 10 buds could be obtained from one bud after 20 days. The strong buds of lcm were inoculated into 1/2MS medium containing naphthalene acetic acid 0.050.2mg/L. After 10 days, 100% rooting became complete plantlets.

II. Points for attention

Petunia likes to be dry and afraid of dampness, and it needs plenty of water in the growth process, especially in the hot summer season. But Rain Water is more, the pot soil is too wet, the stems and leaves are easy to grow; the flowering period is Rain Water, the flowers are faded, perishable, and the petals are easy to tear. With long-term stagnant water in the basin, the roots often rot and the whole plant wilts and dies.

When does Petunia blossom

The florescence of petunia is very long, from spring to autumn, if the winter temperature is higher, it can also blossom. Each petunia blossoms for a long time, continuously, and can bloom continuously for 2 or 3 months.

However, the florescence will also be adjusted with the time of sowing. Usually sow in November and blossom in April; sow in January and blossom in May; sow in April and blossom in July; sow in July and blossom in September; sow in September and blossom in April of the following year.

The difference between million Little Bells and Petunia

1. The difference between flowers

Million small bell: the flower is smaller than the petunia, the Corolla is funnel-shaped, and the flower is rich in color, and the flower is shaped like a bell, so it is called "million little bell".

Petunia: the flower is larger than a million small bell, the flower is funnel-shaped, the color is white, purple or all kinds of red, inlaid with color edge.

2. The difference between leaves

Million small bolls: the leaf is smaller than the petunia, the leaf is relatively smooth, oblanceolate or narrowly elliptic, entire.

Petunia: the leaves are relatively large, the leaves are soft and oval.

3. The difference between branches

The branches of millions of small bolls are semi-lignified or even lignified, but this is not the case with petunia.

Petunia is a long-day plant, especially in a sunny environment, but it is not suitable for exposure, preferably in a semi-shady place. At the same time, petunia is not cold-resistant and will stop growing when it is less than 4 ℃. So you must pay attention to a warmer place in winter.