Eight points for attention of potted roses
1. Roses are drought-tolerant and waterlogged-afraid plants, and xerophytes are almost all waterlogged-afraid plants. If it is potted, it should be cultivated in unglazed pottery pots, and the principle of "pouring it thoroughly without doing it" should be strictly grasped. If roses are often watered (especially in rainy days with high humidity and low evaporation), the roots of roses will be soaked like pickles (which is essentially different from the principle of hydroponics) and die.
2. Cultivate plants indoors, don't put them in a hall with insufficient light for a long time, or carry them to a sunny place regularly to supplement the light. Without photosynthesis, plants will stop producing nutrients necessary for growth, lose the physiological cycle of water and nutrients (optical pump), and appear yellow leaves, rotten leaves and rotten roots until they die.
3. Any plant only likes light fertilization, and the application of concentrated fertilizer (especially chemical fertilizer) will lead to local root rot and death. According to the size of plants and pots, apply 20-40 compound fertilizers (or nitrogen fertilizers) evenly on the edge of pots every 65,438+0-65,438+0.5 months, or pour 1-2 times of light fermented rice washing water every month. As long as the leaves are green and the flowers are bright, there is no need to fertilize.
4. Soil: The soil suitable for the growth of roses must be loose, well ventilated and well drained. The flowerpot should be planted with red soil mixed with humus and dried cow dung. The proportion of mixed soil is as follows: red loam 60%, humus 20% and dry cow dung 20%. It is easy to use commercially available rose culture soil. You can also use it directly. In order to further improve ventilation, drainage and water conservation, if 2-30% ruby soil is used, the soil can reach the best state.
Nursing pruning: pruning can promote the germination of new branches. Prune after flowering, usually to the position of three compound leaves under the flower.
6. Pest control: flowerpots should be frequently sprayed with 15% quicklime water or carbendazim and potassium permanganate aqueous solution for sterilization. High temperature in rainy season from July to August is the high incidence period of leaf spot and powdery mildew, and lime-sulfur mixture with 0.3~0.5 degree can be sprayed in Pomei, once a week, 2~3 times. If longicorn larvae are found in June and July, the branches should be cut off immediately. Other leaf-eating pests will be sprayed with monocrotophos 800 times as soon as they are found, which can kill eggs and larvae.
Seven, plastic pruning: generally do not need pruning, pruning old plants to dense branches, dry dead branches, pests and diseases. Roses bloom, if they fail, pick them and then bloom, otherwise they will only bloom 1 time.
Eight, flowering control: generally speaking, natural flowering is better. Flower spraying in bud stage is bright in color and long in flowering period.