Morning glory is a climbing vine. When growing, it will continuously rotate and wind along the climbing objects (such as bamboo poles and ropes) and extend upwards. The peak period can exceed10cm a day. Morning glory usually blooms in red, rose and purplish red, but also in red and white varieties. It blooms every morning and withers at noon. Morning glory is also called morning glory because it looks like a trumpet.

Petunia is an annual twining herb. The flower of this plant looks like a trumpet, so it is called morning glory in some places. Morning glory is planted in spring and blooms in summer and autumn. There are many varieties of morning glory, including blue, scarlet, pink, purple and mixed colors. Petal edge changes greatly, so it is a common ornamental plant. The fruit is oval and can be used as medicine. Morning glory has three leaves and a heart-shaped base. The flowers are white, purplish red or purplish blue, funnel-shaped, and the whole plant has coarse hair.

cultivation techniques

grow seedlings

The germination temperature of morning glory seeds is 20 ~ 30℃, and it is usually sown at the end of April and the beginning of May (it can be advanced in the south), and it is sown in fine sand seedbeds by 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.

liquid manure

Potted soil can be sandy loam rich in humus, which is made of humus 4 parts, garden soil 5 parts and river sand 1 part, and a small amount of bone meal is applied as base fertilizer at the bottom of the pot. 1 week, apply dilute liquid fertilizer. During the rest period, apply pancake fertilizer or compound fertilizer every 2 ~ 3 weeks. Spraying 1 ~ 2 times of "Doctor Mai" potassium chloride aqueous solution in bud stage will make the flowers big and colorful. Water often, especially in summer, but there should be no water in the basin. Morning glory likes sunshine, so it should be cultivated in the sunny place of the courtyard or on the balcony or windowsill facing south.

Field planting

When Petunia is potted, after the seedlings in the small pot grow two or three true leaves, the root system can be planted in the middle pot, and the base fertilizer can be added in advance. The root development of morning glory needs temperature. According to Japanese researchers, using black pot to absorb heat is better than using red pot to absorb heat. Turn the pots frequently, so that the sun shines evenly and the roots develop well.

Pick a heart

After the real leaves of morning glory grow to three or four pieces, vines begin to grow in the center, which should be removed 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.

Seed maintenance and hybridization

Good varieties must keep good seeds, and they should be classified and labeled when they mature in autumn. 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.