Management of several common flowers in summer

Rose

In summer, potted rose is mostly dormant and semi-dormant, so how to break dormancy, rejuvenate and maintain, promote rose blossom continuously in summer, has become the focus of summer management. To this end, the measures that should be taken are:

First, thinning and pruning. After the rose blossoms, it should be cut off below the third compound leaf of the withered flower to promote strong new branches and blossom as soon as possible. Weak branches and short branches should be cut first and high, while strong branches should be cut back and short to promote weakness and suppress strength, and strive to blossom neatly. The cutting length of long branches should not exceed 1 prime 2 to prevent axillary buds from sprouting slowly. In addition, there should not be too many flowers in each crop, otherwise, the nutrients will be dispersed, the flowers will be small and the next crop flowers will be affected. It is suitable to have 3-5 potted rose.

Second, increase fertilizer and water. In summer, rose grows rapidly, water evaporation and nutrient consumption are large, only the supply of adequate nutrients and water, in order to ensure exuberant growth. The diluent of bean cake and poultry manure after closed fermentation should be applied every 10 days during flowering to make the plant blossom and break the dormancy state of rose in summer. The soil of potted rose is limited, and the hot weather is easy to dry, so it is necessary to increase the number of water spraying, preferably once in the morning and afternoon, to create a humid environment and promote the growth of flowers and leaves.

Third, proper shading. When the average temperature is 20: 25 ℃, it is most favorable for rose to grow and blossom. When the temperature exceeds 33 ℃, rose is in a semi-dormant state. Therefore, it is best to move the potted flowers to the ventilated place under the tree or scaffolding from 8 am to 4 pm in summer to receive scattered light to create a suitable environment for rose growth and flowering.

Fourth, loosen the soil and weed. Fine wire rake can be used to break the soil and weed, loosen the basin soil, enhance the aeration performance and promote the normal growth of the root system.

Fifth, prevent diseases and insects. High temperature in the rainy season from July to August is the high incidence period of many diseases. Flowerpots should often be sterilized with 15% raw lime water or carbendazim, potassium permanganate solution and so on. Leaf spot disease can be sprayed with 50% carbendazim wettable powder 500-1000 times. Powdery mildew can be treated with 600-fold triadimefon or 400-fold trimethoprim. Spray twice a week for three times in a row. When it is found that longicorn beetle larvae are harmful, the branches should be cut off immediately. When leaf-eating pests are found, they should be sprayed immediately to control them.

Alocasia macrorrhiza

Dishui Guanyin (sea taro) is a famous large indoor foliage plant with thick and bright leaves, suitable for display in the living room and rich in tropical scenery. When the soil water content is large, it will drip down from the tip or edge of the leaf, hence the name "dripping Guanyin".

Dishui Guanyin is resistant to yin and afraid of strong light. In summer, the flowerpot should be placed in a ventilated place where there is no direct light, and water is often sprayed to the surroundings and leaves to increase the air humidity, reduce the leaf temperature and keep the leaves clean. But don't overwater, or the tubers will rot. Sometimes dry and sometimes wet, no stagnant water is the best.

Dishui Guanyin grows rapidly in summer and has a large demand for nutrients. Liquid fertilizer such as rotten bean cake water and compound fertilizer (like nitrogen fertilizer) should be applied alternately every 15-20 days, otherwise it is easy to cause empty baldness at the lower end of the stem and smaller yellow leaves or leaves. The application of 2% ferrous sulfate solution every 20 days or so can make the dripping Guanyin leaves bigger, thicker and green. When Dishui Guanyin is long enough for family display, the whole plant is sprayed with 2% paclobutrazol solution, the plant is not only small and exquisite, but also the leaves are thick, and the ornamental value is higher.

Tulip

The flowering period of tulips is from March to May every year. After the tulip blossoms, the underground part of the new bulb develops rapidly, and the mother bulb disappears as a seed bulb. So the tulips should immediately cut off the pedicels and plant the leafy bulbs in the pot (or on the ground). Basic fertilizer should be added first, preferably bean cake crumbs and bone powder to promote the growth of the split bulbs. the new bulbs develop from the lateral buds in the axils of the mother's fleshy scale leaves. When the terminal buds of the mother bulbs form flower buds, the lateral buds germinate.

During the period of promoting the germination of lateral buds, thin fertilizer should be applied two or three times, and usually it should be watered to prevent drying.

When the tulips enter the semi-dormant period in summer, the bulbs should be dug out of the basin, dried and stored. According to the growth law of apical dominance, the development of the first lateral bud below the apical flower bud is the most robust and can become a good flower bulb, and the order of the following lateral buds is weakened. Wait until September to October and then re-pot the good flowering bulbs and apply base fertilizer. It can be planted in the open field in winter, and the pot can be placed in a warm place facing the sun outside. the pot soil should be dry and avoid dampness. in this way, after the Beginning of Spring next year, it will grow new leaves from the soil, apply thin fertilizer twice, and bloom again in March or April.

Early Chrysanthemum

The natural florescence of early chrysanthemum is around the National Day, and the field management in summer has a direct impact on whether it can blossom on time, so it is particularly important. Technical points of field management in summer:

Appropriate watering early chrysanthemum likes to be wet and afraid of waterlogging, and summer watering is very important. Large amount of water can easily lead to rotten roots, and lack of water affects plant growth, so it should be watered in accordance with the principle of seeing dry and wet. It can be watered every 4-5 days, and pay attention to loosening the soil and preserving soil moisture after watering. There should be little or no watering in cloudy and rainy days, and stagnant water should be eliminated in time in rainy days to prevent the roots from rotting for too long. Watering should also have a good time, should be watered in the morning and evening, must not be watered at noon.

Reasonable heart picking can make the early small chrysanthemum plant shape plump and more pregnant buds. Coring should start when the chrysanthemum seedlings grow 6 leaves, and then pick the heart once for every 6 leaves, usually 3 to 4 times before flowering.

Proper fertilization in summer is the peak growth season of early small chrysanthemum, proper fertilization is very necessary, but the amount of fertilizer should be determined according to the growth of the plant. The plants with exuberant growth should be fertilized less, those with poor growth should be fertilized more, the interval of fertilization should be about 20 days, the application of fertilizer should be based on three-element compound fertilizer, and should be stopped after flowering.

The main diseases and insect pests of early chrysanthemum are gray leaf spot, black spot, gray mold, aphids, shell insects and ground tigers. If there is an occurrence, 50% carbendazim 500x solution or 75% chlorothalonil wettable powder 800x solution can be used to control gray leaf spot, black spot and gray mold. 1000 times omethoate EC is used to kill shell insects and aphids, and ground tigers can be poured around the plant roots with 1500 times of phoxim. The dosage is 300 ml per plant, which can also be combined with watering. (source of information: Ningbo Agricultural Economic Network)