Many flower friends want to know how to manage potted osmanthus. Today, Lan Yao will talk to you about the matters needing attention and common problems in potted osmanthus cultivation.
1. Cultivation method of potted osmanthus fragrans:
1 watershed soil selection:
When potted osmanthus fragrans, the pot soil can be made of mountain mud/humus soil: garden soil: sandy soil in the ratio of 5:3:2, or garden soil: manure: river sand in the ratio of 1: 1. Rotten organic fertilizer and bone meal should be added as base fertilizer when serving in pots.
2, flowerpot selection:
When potted osmanthus fragrans, it is suggested to choose a well-ventilated soil basin for planting. The electric fan at the bottom follows the tiles to facilitate drainage.
3, the basin time:
Osmanthus fragrans should be planted in late autumn 165438+ 10-65438+early February, or early February-March in spring, so as to avoid freezing injury in winter. After the pot is put on, it should be watered and permeable, and put in a ventilated place to slow down the seedlings. After 1 week, it should be moved to the sunny place for maintenance.
4. Water management:
Potted osmanthus should be kept moist, and drainage should be paid attention to in rainy season to prevent root rot caused by too much water. When flowering in autumn, the pot soil should be avoided from being too wet, otherwise it is prone to the phenomenon of falling flowers and buds.
5, fertilization:
During spring germination, 30@ cake fertilizer water was applied every 10- 15 days, and potassium dihydrogen phosphate or calcium superphosphate was added at the same time after July to promote flower bud differentiation.
6, pruning:
After autumn flowers, prune and trim dead branches, twigs, pests and diseases, so that thick and short branches are evenly left on each side branch. And in the growing period, it is necessary to cut off the budding branches in time to avoid excessive consumption of nutrients.
7, pest control:
Osmanthus fragrans is prone to carbon maggot disease, brown spot disease, sooty blotch, whitefly disease and leafhopper disease. Attention should be paid to timely prevention and treatment.
Second, the four taboos in the cultivation of osmanthus fragrans
1, avoid alkaline earth:
Osmanthus fragrans likes slightly acidic soil, and the suitable pH value is 5.5-6.5. If planted in alkaline soil, it will lead to yellowing of leaves and even death of the whole plant.
2. Avoid pouring half water:
If the water is not enough, the surface of the soil will be wet, the lower part will be dry, and the roots will not get enough water, which will lead to the leaves becoming dry and even falling off.
3, avoid water:
The moisture in the soil is easy to cause rotten roots and fallen leaves. As time goes on, the roots will rot, leading to the death of plants. Pay attention to drainage in rainy season.
4. Avoid high temperature overwintering:
Osmanthus fragrans is cold-resistant, and can survive the winter in the open air south of the Yangtze River and indoors in North China. The appropriate room temperature is 2~4℃. If the room temperature is too high, dormant buds will germinate in winter or early spring, wasting nutrition and plants will be stunted. It is dry and windy in the early spring in the north, so potted osmanthus should not leave the room too early, otherwise the new branches will be injured by strong winds; Osmanthus fragrans is also afraid of dust and should not be planted near factories and mines.
Third, common problems in cultivating osmanthus varieties:
1, potted osmanthus is less, and the fragrance is not strong?
This is caused by insufficient nutrition or insufficient light to some extent. Osmanthus fragrans likes fertilizer. In addition to applying base fertilizer, topdressing should also be done in time before and after flowering. Osmanthus fragrans likes sunshine and should be planted in sunny and well-ventilated places and pruned in time.
2. What should I do if potted osmanthus is not easy to open?
It takes about 8- 10 years for potted osmanthus seedlings to bloom, and about 4 years for cutting. Most ramets and grafted seedlings can bloom in the second year. If potted osmanthus has reached the age of flowering, it is mainly due to improper maintenance. Such as improper watering, stagnant water, alkaline soil, excessive wintering temperature, smoke hazard, insufficient illumination, etc. Will cause osmanthus not to bloom. In addition, potted osmanthus often does not change soil, and insufficient fertilization will also affect plant flowering.
3. How can osmanthus blossom every year?
In order to make osmanthus blossom every year, maintenance is very important. First of all, we should ensure adequate illumination, and secondly, we should pay attention to fertilization. As the saying goes, if you want sweet-scented osmanthus, you always have to raise pig manure tanks. It can be seen that osmanthus is very fat. Apply foot fertilizer in winter, mainly nitrogen fertilizer in growth period, and phosphorus and potassium fertilizer in flower bud differentiation period.
4. How to prevent osmanthus from falling leaves seriously in winter?
In cold areas, potted osmanthus fragrans should be moved to a place with sufficient indoor light in winter to avoid falling leaves caused by freezing injury. Apply dilute nitrogen fertilizer after flowering in autumn and base fertilizer before winter. Sand should be covered in winter and watered with clear water.
5. Why is the sweet-scented osmanthus tip burnt?
If osmanthus fragrans suffers from diseases such as carbon maggot disease, it will show tip scorching. At ordinary times, ventilation should be strengthened, watering should not be too much, dead leaves should be cleaned up in time, and diseased leaves should be cut and burned in time.
When the pot soil is alkalized, the tip of the pot will also be scorched. Osmanthus fragrans is an acidic flower, so we should pay attention to keep the soil acidic.
If you enter the room too early in winter, or the overwintering temperature is too high, the buds will germinate early, and when you move outdoors in spring, it is easy to have dead bamboo shoots after drought and wind.