1, rational fertilization

0. 1% ~ 0.2% multi-component foliar fertilizer solution was applied to rhododendron Belgium at seedling stage for about 20 days, and the amount of fertilizer was appropriately increased from one month before flowering, with 0.2% available phosphorus and potassium fertilizer as the main fertilizer, and it was applied every 10d to prevent overgrowth and promote the flowers to grow bigger and brighter. Stop fertilization during flowering to avoid promoting new branches and unfavorable flowering. Pay attention to the fact that fertilization should not be too thick and excessive to avoid fertilizer damage.

2. Summer management

Belgian cuckoo likes cool and humid climate. In summer and autumn, it should be placed in a cool and ventilated place, and clear water should be sprayed on the branches and leaves and around. You can also put water on a shallow tray and a flowerpot on the tray, so that the flowers can slowly absorb water from the bottom of the shallow tray. Therefore, the cultivation place should be in southerly wind, semi-cloudy or scattered sunlight, and 60% sunshade net can also be covered, especially in summer, in order to achieve the purpose of ventilation, moisture-proof, sun protection and heatstroke prevention.

3, soil disinfection

The growth of Rhododendron Belgium needs not only loose and acidic soil, but also strict soil environmental conditions. When preparing soil, soil is disinfected with 1.5 kg carbofuran and 1000 times diluted potassium permanganate solution per mu, which can prevent and control cutworms, crickets, scorpions and diseases. Potted soil can be fumigated with steam or disinfected with potassium permanganate before planting, so that the soil can meet the requirements of cleanliness, hygiene and no pests and diseases.

4, cultivation points:

Pots with 15cm for potted plants have thin roots, and the fertilization should not be too thick, otherwise the roots cannot be absorbed. Fertilize 1 time every half month during the growth period or use Huiyou 2 1-7-7 acid fertilizer. When new leaves grow and flower buds differentiate and form, the basin soil remains moist. Control watering during flowering to avoid excessive water loss. Pruning, pruning and coring should be carried out during the growth period, and the long branches and sprouting branches in the rhizosphere should be cut off. Be sure to change pots after flowering, because the root system is fragile and easy to break, so pay attention to less damage to new roots when operating.

5, pest control:

The harm of brown mold often occurs, and it should be sprayed with Bordeaux mixture or 50% carbendazim wettable powder 1000 times. In summer and autumn, it is vulnerable to red spiders and army worms, and 80% dichlorvos EC 1500 times can be sprayed.

:? Matters needing attention in breeding of rhododendron in Belgium

1. Newly bought azaleas should try to keep the air humidity and basin soil moist. It needs air circulation, but it can't be directly blown by the cold wind, let alone moved to the outdoor wind, and it is not in a hurry to change soil and fertilize. If the purchased azaleas are in winter, they should be fully illuminated, and indoor maintenance should be placed in the sunny place of the south window as far as possible. The ambient temperature should not be lower than 12 degrees, and it is better to keep it at 18 ~ 22 degrees.

Don't change places at will, lest the temperature change dramatically. Don't put it in a dirty place. Because the family temperature is low in winter, and indoors, the pot soil is often wet but not dry, so watering must be strictly controlled. You can observe it carefully at first. When it was found that the young leaves wilted slightly, the potted soil was short of water.

At this time, you can spray water on the leaves first, then water them later, and usually spray more water on the leaves to keep the humidity of the small environment. Especially in winter, water spraying should be given priority to, supplemented by watering.

2. Rhododendrons bloom too much, bloom for too long, and consume a lot of nutrition, so nutrition should keep up. Insufficient nutrition supply is also one of the reasons for leaf wilting and defoliation. It is necessary to remove residual flowers in time to reduce useless consumption of nutrition. If the twigs growing on the roots and branches are cut off in time, these measures can effectively maintain the vitality of plants and try to suppress wilting and defoliation.

References:

Baidu encyclopedia azalea