Cultivation method of hydrangea: substrate
Preparing hydrangeas likes loose, fertile and well-drained soil. Vinegar chaff (mainly composed of chaff), cow dung, peat and garden soil can be evenly mixed in equal amounts, and then placed until they are completely cooked before use.
Cultivation method of hydrangea: illumination
Hydrangea likes semi-cloudy environment. If the light is too strong, it is easy to cause the leaves to turn green and white, and in severe cases, it is easy to cause the leaves to burn and scorch. Under moderate light, the plants grow healthily and the leaves are dark green. In hot summer, 75% sunshade net is used for shading, and the light is adjusted through its ups and downs. Pull the sunshade net on sunny morning 10, and open the sunshade net at 4 pm; Remove all sunshade nets in rainy days. The sunshade net should be gradually removed to avoid excessive light burning plant leaves.
Cultivation method of hydrangea: transplanting and shaping.
After transplanting, it is necessary to shade properly and spray water on the leaves to facilitate seedling delay. When new leaves grow, we should remove the dense branches and overlapping branches in time, leaving 3 ~ 5 branches to obtain good plant shape.
Cultivation method of hydrangea: temperature
The optimum growth temperature is 15 ~ 27℃. In the north of the Yangtze River, you have to move into a greenhouse above 5℃ in winter. In hot summer, measures such as shading, strengthening ventilation and spraying water on leaves are taken to cool down.
Cultivation method of hydrangea: watering.
It is not advisable to water too much, and it is advisable to keep the soil moist frequently. When it is dry and hot in summer, water can be sprayed on the leaves to reduce the water transpiration rate. Watering in winter? See dry and wet? For the principle, control watering during dormancy and keep it semi-dry. The water demand increases obviously before and after germination, and it should be watered 1 ~ 2 times a day.
Cultivation method of hydrangea: fertilization
In the growing period, decomposed alum fertilizer water 1 times (water 400-500 L, bean cake10-20-30 kg, pig manure 20-30 kg, ferrous sulfate 5-6 kg) is applied every 15 days, and leaves are exposed every 15 days. During flower bud differentiation, phosphorus and potassium fertilizer should be added appropriately. Dormancy period, fertilization stops.
Control of leaf spot of Muxiuqiu (1). Mainly harmful to leaves, the lesions are round to polygonal, brown or dark gray, and the edges are purple-brown or nearly dark brown. Spraying 500 times solution of 65% zineb wettable powder or Bordeaux solution (1: 1: 200) at the initial stage of the disease, spraying 1 time every 7 days for 2-3 times continuously.
(2) rust. It mainly harms leaves, which have large pale yellow to rusty brown spore piles, and the diseased leaves are dry and broken. Spraying 800 times 15% triadimefon wettable powder in the onset season.
(3) Rhizoctonia solani. It mainly harms leaves and stems. The leaves near the ground produce waterlogged chloasma, which spreads to the stems, resulting in dry leaves and black stems. Spraying 800 times solution of 75% chlorothalonil wettable powder or 500 times solution of 50% thiram wettable powder at the initial stage of onset.
(4) powdery mildew. It mainly harms leaves and can infect stems in severe cases. The leaves show a light gray mold layer and gradually turn light brown. Spraying 15% triadimefon wettable powder 1000 times or 70% thiophanate-methyl wettable powder 1000 times during the onset period, spraying 1 time every 7 days for 2 ~ 3 times in a row.
(5) scale insects. It mainly harms young stems and leaves, causing yellowing of leaves and dry branches. When a small amount appears, gently brush it off with a soft brush, and then rinse it off with clear water. When using chemicals, it is better to spray 80% dichlorvos 1000 times or 50% chlorpyrifos EC 1000 times during the hatching period of nymphs.
The knowledge about hydrangea extends to deciduous or semi-evergreen shrubs, up to 4 meters. Bark is grayish brown or grayish white; Buds, young skills, petioles and inflorescences are densely covered with gray-white or yellow-white tufted short hairs, and then gradually become hairless.
Leaves gradually fall from winter to the next spring. Oval to ovoid or ovoid oblong, 5 ~ 1 1 cm long, blunt or slightly pointed at the top, round at the base or sometimes slightly heart-shaped, with small teeth at the edge, densely tufted short hairs at the top at first, hairy only at the midvein on the back, tufted short hairs at the bottom, 5 ~ 6 pairs of lateral veins, mutual netting before the edge, slightly concave at the top, and with midvein at the bottom. Petiole length 10 ~ 15 mm.
Cymes are 8 ~ 15cm in diameter, all of which are composed of large sterile flowers. The total pedicel length is 1 ~ 2cm, and there are 5 first-grade radiation branches, and peanuts are on the third-grade radiation branches. The calyx tube is tubular, about 2.5 mm long and 65438 0 mm wide, hairless, with the same length of calyx teeth as the calyx tube, rectangular and obtuse at the top; Corolla white, radial, diameter 1.5 ~ 4 cm, lobes round and obovate, tube very short; Stamens about 3 mm long, anthers small, suborbicular; The pistil is sterile.
Hydrangea flower arrangement maintenance precautions Hydrangea is a very love the water plant. When maintaining, the water level in the vase must not be low, and it needs to be filled with water. Change the water and cut the roots every day, otherwise it will easily lose water. You can often spray water around hydrangea to increase air humidity. You can spray a proper amount of water on the flower heads during the day. At night, you can cover the surface of hydrangea with wet paper towels and then spray water. If the hydrangea falls, you can soak the whole hydrangea in water, which is easy to recover. If dehydration is not serious, soaking for about 4 hours is usually enough. If the situation is serious, it is best to soak all night.
Maintenance points of ball flower arrangement