Rhododendron is a shade-loving plant, and direct sunlight is not good for its growth. Therefore, it is best to choose a shady place, or take this into account when designing greening, and deliberately arrange trees in a special garden.

Rhododendron likes acidic soil with good drainage, but because all kinds of gardens and landscapes use cement as roads and pavements, the soil in Rhododendron planting area is alkaline, so it is necessary to replace the soil in planting area and add a certain amount of peat soil.

North of the Yangtze River, potted plants are used for viewing. Potted soil consists of humus soil, sandy soil and the same soil (7:2: 1) mixed into cake fertilizer, manure and so on. , stir well and plant. Generally, change pots or soil in March in spring.

The area south of the Yangtze River is mainly planted in the ground, which should be planted before germination in spring. The place should be in a ventilated and semi-cool place. The soil should be loose and fertile, rich in humus, and acidic sandy loam is suitable, and it is not suitable for water accumulation, otherwise it is not conducive to the normal growth of rhododendrons. After planting, be sure to water it.

Step 2 plant

Rhododendron is most suitable for planting in early spring or late autumn. If it is planted in other seasons, a shade shed must be built. When planting, the roots and soil must be uniform, but not too tight, and the soil surface near the roots is in an arc state, which can not only protect the shallow roots of plants from freezing damage, but also facilitate drainage. ?

3. Temperature

Move out of the greenhouse in the middle and late April, first put it in the lee of the sun, cool in summer, or put it in the shade under the tree to avoid direct sunlight. The suitable growth temperature is 15-25℃, and the highest temperature is 32℃. From mid-June, autumn, 10 is moved indoors, and it is placed in a sunny place in winter. The room temperature is kept at 5- 10℃, and the lowest temperature cannot be lower than 5℃, otherwise it will stop growing.

Extended data:

First, the growth environment

Rhododendron is born under sparse shrubs or pine forests in mountainous areas at an altitude of 500-1200 (-2,500) meters. It likes acidic soil, and it doesn't grow well or even can't grow in calcareous soil. Therefore, soil scientists often regard rhododendron as an indicator crop of acidic soil.

Rhododendron likes a cool, humid and ventilated semi-cool environment, which is afraid of extreme heat and cold. The suitable growth temperature is 65438 02℃ to 25℃. When the temperature exceeds 35℃ in summer, the new shoots and leaves grow slowly and are in a semi-dormant state.

Sun protection is required in summer, and attention should be paid to keeping warm and cold in winter. Avoid exposure to the scorching sun, and it is suitable for growth under scattered light with low light intensity. If the light is too strong, the young leaves will be easily burned, and the old leaves will also be scorched, which will lead to plant death in severe cases.

Cold-proof measures should be taken when planting rhododendron in the open field in winter to ensure its safe overwintering. Among the ornamental rhododendrons, Rhododendron occidentalis has the weakest cold resistance, and freezing injury is easy to occur when the temperature drops below 0℃.

Second, the flowering period

If you want to see flowers in the Spring Festival, you can move the potted flowers to the sunny place at 20℃ in the greenhouse in June+10 in 5438 or 20 days before the Spring Festival. Other management is normal, and flowers can be seen during the Spring Festival. If you want to see flowers in May 1 day, you can move the flowerpot indoors below 5℃ for cold storage before germination in early spring, move it to the sunny place in the greenhouse at 20℃ in April 10, and move it out on April 20, so you can see flowers in May 1 day.

So the temperature can adjust the flowering period, and it will open at four o'clock as you like. In addition, the plants cut immediately after flowering can bloom in late June at 65438+ 10; If pruned in the peak season, the flowering period can be delayed by about 40 days; If pruning is combined with cutting, the flowering period can be postponed to February of the following year. Therefore, pruning in different periods also affects flowering time.

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