New Guinea Impatiens flowers four seasons important conditions, flowering maintenance

New Guinea impatiens has the characteristics of more flowering, longer flowering period and more tolerance to semi-shade than ordinary domestic impatiens, so it is more suitable for indoor culture. The following editor will share with you how to cultivate New Guinea impatiens to make its florescence longer and bloom full of pots.

The flowering period of New Guinea Impatiens

The flowering period of impatiens is very long and can bloom from spring to autumn, which is also suitable for indoor breeding. In the process of breeding, as long as we manage it well, we can make it bloom longer, bloom continuously, and the flowers are colorful.

Key points for the conservation of impatiens in New Guinea

New Guinea impatiens is a plant in the middle and lower layers of the tropical rain forest. It likes warmth, is not resistant to high temperature, cold, drought and waterlogging, and belongs to a relatively delicate plant (but it has a long flowering period and beautiful flowers, so we still have to raise it. Appearance is justice). According to the above characteristics, so we should pay attention to the following problems in the maintenance process.

1. Temperature requirements of New Guinea Impatiens

New Guinea impatiens like warmth, suitable for 25-30 degrees temperature, but can not bear high temperature, it will dormancy when the temperature exceeds 30 degrees, so we have to shade, spray water and other cooling work when the summer temperature is high.

It is not hardy, so we must breed it above 10 degrees in winter.

two。 Lighting requirements of impatiens in New Guinea

Although New Guinea impatiens is shade-tolerant, it also needs proper light at flowering stage, which is good for its bud formation, which is also an important condition for it to bloom more and more brightly.

3. Lighting requirements of impatiens in New Guinea

New Guinea impatiens is not resistant to waterlogging or drought, likes wet environment, we must pay special attention to watering, do not miss watering and overwatering, if missed for a day, it may wilt, if more watering may lead to root rot, because its root system is also quite fragile, so loose soil, so it is not easy to accumulate water.

Usually we can spray more water on the leaves and sprinkle some water around the plant to ensure its wet environment.

4. Fertilization method of Impatiens balsamina in New Guinea

New Guinea impatiens needs to add some phosphorus and potassium fertilizer during the growing period and flowering season. Because of its long flowering period, it can be added during the flowering period to ensure its adequate nutrition and provide sufficient conditions for its flowering.

The above is the flowering maintenance method of New Guinea impatiens. For more information, please continue to follow Huayu Valley.

Key points of cultivation of New Guinea Impatiens

New Guinea Impatiens can blossom all the year round if the temperature is suitable. New Guinea Impatiens is a horticultural hybrid with bright colors. It should be noted that New Guinea impatiens are afraid of the cold and will wither the whole plant in case of frost.

New Guinea Impatiens

1, light and temperature: new Guinea impatiens like warmth and sufficient light, can not bear cold, avoid hot sun exposure, the suitable temperature for growth is about 20 degrees, flowers will become smaller when more than 25 ℃, and relative humidity must be increased if more than 30 ℃ in order to make the plant grow continuously. When the temperature is relatively low, the plant growth stops, and when the temperature drops below 7 ℃, it will suffer frost damage.

2. Matching soil: like moist and afraid of drought, avoid waterlogging. When the moisture is insufficient, it is easy to cause the phenomenon of falling flowers and leaves. It has strong adaptability to soil, and the pH value should be controlled between 5.5 and 6.5. Rotten leaf soil, vegetable garden soil and sand should be mixed with 5 ∶ 3 ∶ 2 to form loose, fertile and breathable sandy soil. The basin should not be too large. The basin soil should be dry and wet, and it should be watered until the bottom of the basin comes out of the water. waterlogging will rot the roots and branches and leaves will wither if it is too dry. The most important part of family maintenance is to maintain a certain air humidity, it is appropriate to often spray water to the plant.

3. Fertilization: impatiens in New Guinea have a long flowering period and usually need more nutrients, so some nitrogen fertilizer can be applied appropriately at the seedling stage. During the growing period and flowering period, nitrogen, phosphorus and potassium compound fertilizer should be applied once from 10 to 15 days. Avoid single application of nitrogen fertilizer, otherwise there will be more leaves and less flowers. If you accidentally stick the fertilizer on the leaves during fertilization, you should spray water and wash it off in time.

Greenhouse potted plants of New Guinea Impatiens

New Guinea Impatiens (Impatiens hawkeri) belongs to the genus Impatiens of Impatiens family, with rich flowers, red, white, pink and complex colors, bright and cheerful color, plump and round plant type, flowering in four seasons, long flowering period and unique leaf color, so it is widely used in flower bed layout, overhanging planting and so on. Especially as the annual supply of potted flowers, it is quite popular in the European and American markets, the market sales volume is increasing rapidly, and new varieties appear every year, not only the flowers and colors are richer, but also the plant resistance and disease resistance are improved.

China began to introduce ornamental varieties of New Guinea impatiens in the early 1990s. As a fashionable potted flower, it is increasingly favored by people. Supply falls short of demand and the market prospect is broad.

Rooting seedling production

The seeds of New Guinea impatiens are usually difficult to obtain, and almost all of them are propagated by cuttings except for the first generation of hybrids. Flower producers can obtain New Guinea impatiens cuttings in a variety of ways, but they must ensure that they are high-quality breeding materials free from diseases and insect pests.

In the selection of cuttings, plants with good growth and free of diseases and insect pests were selected as mother plants, which were specially used for cutting cuttings. 2-2.5cm cuttings with terminal buds are the best propagation material, requiring no more than 2 fully expanded leaves and 3-4 leaves that are not fully expanded. Leave 1. 0-1.3cm stem segment below the lowermost leaf so that it can be inserted into the matrix. The suitable cutting density is that the cuttings leaves do not cover each other. If buds have already appeared in panicle cutting, all buds should be removed or discarded. When the cuttage propagation of New Guinea Impatiens is carried out in China, the cuttings are sometimes as long as 6-7cm, even more than 10cm, resulting in difficulties in mother plant maintenance and waste of breeding materials. In addition, the longer cuttings have high maturity, may have completed flower bud differentiation, difficult to root, and have a greater possibility of various diseases and insect pests, destroying the uniformity of plant growth. Cuttings should be cut as soon as they are cut. If they cannot be cut in time, they should be placed in open pockets and sprayed continuously. The rooting rate of New Guinea impatiens cuttings is close to 100%, and rooting element treatment is generally not needed.

All articles related to cutting should be kept clean and all items in contact with cuttings should be disinfected. The cutting utensils can be soaked in 10% medical disinfectant for 60 minutes or sterilized with 10% household bleach for 30 minutes.

Cutting substrate

A variety of cutting substrates can be used, such as peat soil, vermiculite, perlite, plain sand and so on, but all substrates must have good drainage and high air permeability. The practice shows that the mixture of peat soil and vermiculite at the volume ratio of 1 ∶ 1 is very suitable for rooting of New Guinea impatiens cuttings. The content of soluble salt in cutting substrate was lower than that of 0.75mmhos/cm (EC=0.75ms/cm), and the pH value was maintained between 5.5 and 6.5.

Environmental condition

During the cutting period, the light intensity was controlled at about 250 μ mol / m2 ·s. After rooting, the light intensity can be increased to about 400 μ mol / m ~ 2 ·s to improve the growth rate of roots. The daytime temperature is 24 ℃ and the night temperature is 21 ℃-22 ℃. When the substrate temperature is 22 ℃-24 ℃, it is the most suitable for rooting, and it is best to be heated by ground temperature. If indoor full-light spray cutting is used, with the difference of weather, the spray frequency decreases from 5 seconds every 15 minutes in sunny days to 5 seconds every two hours in cloudy days; there is no need to spray at night, otherwise it is bad for growth. If small arch shed cuttings are used, they should be sprayed 1-2 times a day, properly ventilated during the day and covered at night. Under the condition of high temperature and humidity, the callus was formed in 5-7 days, the root length reached 0.6cm in 10-14 days, and the spraying frequency decreased to once every half an hour. After 3-4 weeks, the root length was long enough to be transplanted into the pot. There is no need to apply fertilizer during cutting. The cuttings should be transplanted into the pot immediately after they are long enough, otherwise the free development of the roots will be restricted.

Finished flower production

Cultivation substrate

The cultivation substrate of New Guinea impatiens requires good drainage and ventilation, but its water retention is slightly better than that of other flowers, because all varieties need a lot of water and can not wilt. The substrate with high water retention can provide sufficient water for its normal growth. In the production process, peat soil and perlite are generally mixed according to the ratio of 2-3 ∶ 1 as the cultivation substrate, and appropriate amount of vermiculite, fermented bark, sawdust or rock wool can be added according to the actual situation.

In the preparation of cultivation substrate, the pH value was adjusted to 5.86.2 with lime, 2kg of perphosphate and a small amount of trace element compound fertilizer could be added per cubic meter of substrate. The pH value of culture medium should not be lower than 5.8. otherwise, it is easy to cause trace element poisoning.

Fertilizer and water management

The greenhouse with better conditions had better provide fertilizer and water by drip irrigation. Do not apply fertilizer or only a small amount of fertilizer before the plant crown reaches the edge of the cultivation container, and the concentration of nitrogen fertilizer is about the same as that of potassium fertilizer. If perphosphate is used in the cultivation medium, the concentration of nitrogen and potassium fertilizer is from 150ppm to 200ppm, otherwise it should contain phosphorus 50-75ppm. Some data show that New Guinea Impatiens grows fastest when the concentration of N fertilizer is 12mmol/L (about 170ppm). The nitrogen uptake of New Guinea Impatiens was different in different growth stages, and there was little requirement for nitrogen in the early stage, but sufficient nitrogen supply was required in the later growth stage (after 40-70 days). The total nitrogen absorbed in the whole growth period was 0.5g / plant, and the absorption amount of nitrate nitrogen (Nitrate-N) was higher than that of ammonia nitrogen (Ammonium-N). Excessive ammonia nitrogen often led to the shedding of plant leaves and buds. Therefore, nitrate nitrogen should be used mainly in the process of management. If it is not possible to apply fertilizer every time, the nutrient solution should be applied once after every three times of watering, and the concentrations are: N300-350ppm, P100ppm, K300-350ppm. New Guinea Impatiens likes low concentration fertilizer. It has been proved that the electrical conductivity (EC) of nutrient solution is higher than 1.5mS/cm, and the plant growth is poor. The salinity of the substrate is too high, the leaves are narrow and curly, do not extend, root growth is inhibited, or even rot, but if the lack of fertilizer, the leaf color is mottled. New Guinea impatiens is sensitive to trace elements, excessive trace elements lead to poisoning, resulting in necrotic spots on the lower leaves or leaf edges, top death or decay, and obstacles to the development of the top leaves. Impatiens magnesium deficiency in New Guinea is very common and can be treated with magnesium sulfate once a month at a concentration of 600 grams per 100L of water.

The condition of fertilizer and water management is good, the leaves of New Guinea impatiens are bright and thick, stiff and extended, and the leaf area is large, otherwise the leaves are thin and wrinkled, and the plant grows slowly.

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