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How to Grow and Care for Blue Sky Vine (Thunbergia Grandiflora)

Written by Ivy

Nov 11 2021

How to Grow and Care for Blue Sky Vine (Thunbergia Grandiflora)
Blue sky vine(Thunbergia Grandiflora) blooms a lot and has a long flowering period. Blue sky vine can bloom from spring to autumn and winter. The shape of blue sky vine is very unique, and it is in the shape of a bell shaped flower. The color is bright and attractive, and the height of the plant can reach about 20 ~ 30 cm, Because of its beautiful appearance and tall image, it is often praised as a rich image. Therefore, many people like to carry out potted culture at home. As long as we plant a pot of blue sky vine on the balcony, we will bear many seeds in autumn and winter, and then collect these seeds, plant them in our own flower pot, and then sprout and grow up, It is beautiful every year. Generally, blue sky vine is planted in spring in most places, because the temperature at this time is very suitable, about 20 degrees.

Blue Sky Vine Quick Info

Botanical/Scientific Name Thunbergia Grandiflora
Common Name Blue Sky Vine
When to Grow/Bloom/Harvest Grow in the Summer to fall to yearround/Bloom in the summer
Uses Easy and low-maintenance container plant
Origin China, India, Nepal and widely naturalised elsewhere
Light Care Midafternoon Sunlight
Soil Care Well-drained soils
Temperature Care Warmer climates
Humidity Care Moisture
Watering Water the plant when the soil is dry
Pruning Care Prune actively growing blue-sky vine stems
Fertilizer Care Fertilize in spring and fall with a granular fertilizer
Propagation Propagate by layering
Toxic Non toxic
Flower Color Lavender-blue

Blue Sky Vine Care in Detail

How to Grow and Care for Blue Sky Vine (Thunbergia Grandiflora)

Blue Sky Vine Watering

When we water blue sky vine, we can water it as long as we find that the surface of the basin soil is white.
We should water blue sky vine properly. If it is too dry, the plant will wither, and if it is too wet, the root system will rot. Generally speaking, when we feel that the soil is nearly dry, we can pour water once, which can meet the growth needs of blue sky vine without causing ponding.

Blue Sky Vine Soil

For the selection of blue sky vine soil, we can choose half of ordinary culture soil and half of plain sandy soil for mixing, so as to make blue sky vine grow naturally. We should pay attention to that when the seedlings are in the pot, we must ensure that one plant in one pot. At the same time, the roots should also be covered with a small amount of soil, so as to reduce the damage of roots.
Blue sky vine belongs to herbaceous plants, which are no more resistant to wet soil than shrubs. When the soil is wet, the roots will rot easily, and the flowers will change color. In serious cases, it will rot. therefore, the soil humidity of potted blue sky vine should be kept at about 50%, which is the key.

Blue Sky Vine Light

Because blue sky vine prefers sunny and dry environment, planting morning glory in April is very beneficial to its growth, Blue sky vine is a plant with long sunshine. It grows vigorously with plenty of sunshine and lush leaves and flowers. In the case of insufficient light, the branches and leaves are easy to grow in vain, resulting in the lack of vegetative roots, less flowers and poor quality. If we can ensure that blue sky vine has more than 12 hours of light every day and the temperature at night is maintained above 10 ℃, it can bloom from early summer to late autumn for more than 100 days.

Blue Sky Vine Temperature

Blue sky vine is a plant with long sunshine. It grows vigorously with plenty of sunshine and lush leaves and flowers. In the case of insufficient light, the branches and leaves are easy to grow in vain, resulting in the lack of vegetative roots, less flowers and poor quality. Blue sky vine can bloom from early summer to late autumn for more than 100 days if it can ensure more than 12 hours of light every day and the temperature at night is maintained at more than 10 ℃.
The optimum growth temperature of blue sky vine is 13 ~ 18 ℃ and 4 ~ 10 ℃ in winter. It can withstand high temperature of about 35 ℃ in summer. If the temperature is too high, it is best to move into a place with good ventilation and bright scattered light for maintenance, so as not to burn the plant.

Blue Sky Vine Humidity

Blue sky vine does not require high humidity and has certain adaptability, so we should try our best to fit the growth habits of blue sky vine, provide sufficient sunshine and maintain air circulation. The rest is our daily watering and fertilization management.

Blue Sky Vine Fertilizer

As for blue sky vine fertilization, we can use nitrogen, phosphorus and potassium compound fertilizer. At the same time, we should also pay attention to the amount of fertilization, not too much. It is recommended to apply fertilizer once a half month. (Find more Climbing Plants with Flowers here.)

Blue Sky Vine Pruning

As a vine, blue sky vine will affect the flowering of the whole plant if it is not pruned in time during its prosperous period of branches and leaves. Therefore, when the branches of blue sky vine grow to six or seven leaves, we can cut off the top, which can effectively control the growth rate of blue sky vine. We have to wait until blue sky vine is implemented in the basin soil and insert a 1m long thin Bamboo pole in the center of the basin. We can then use a lead wire about 3 meters long, wrap one end of it on the bamboo pole, and then spiral upward from the basin mouth to form a tower shaped spiral frame with large bottom and small top. The upper end of the iron wire is fixed at the top of the bamboo pole. Blue sky vine is a left-handed plant. The circling direction of the lead wire must comply with the habit of blue sky vine winding to the left. When the main vine climbs to the top of the pole along the lead wire, remove the top. When the blue sky vine grows to 6 to 7 leaves, pinch the tip, so that the flowers can be large and bloom continuously.

Blue Sky Vine Repotting

Blue sky vine can be repotted from March to April. At this time, we first change the blue sky vine from a hole basin to a small basin. The diameter of the small watershed is about 8 ~ 10 cm, so it should not be too large, because blue sky vine is afraid of water. The large basin is watered once and does not dry for a long time, which is not conducive to the growth of its roots.
Before blue sky vine repotting, I should prepare the medium, load the soil into the Flower pot, and add some base fertilizer to the soil. Take the petunia seedlings out of the old pot, hold the pot with one hand and tap gently to let the plants out of the pot. The soil on the root system shall be cleaned, and the damaged, rotten and diseased roots shall be cut off. Then, the blue sky vine shall be planted in the basin, watered and placed in the semi shade.

Blue Sky Vine Pest & Disease Control

The most common diseases and pests of blue sky vine include white rust, leaf disease, etc. in severe cases, the petiole and tender stem of blue sky vine will be damaged, resulting in plant wilting and death.
Blue sky vine is mainly susceptible to white rust. The diseased parts are mainly leaves, petioles and tender stems. There are light green spots on the leaves at the initial stage of the affected leaves. In this case, we can timely remove the blue sky vine diseased plant and destroy it to reduce the infection of seeds. Select and keep disease-free seeds as breeding seeds. We should disinfect the seeds before sowing blue sky vine to avoid rotation with Convolvulaceae plants. In the initial stage, l% Bordeaux solution or 50% Phytophthora net 500 times were sprayed, and spraying 1 times every 10~15 days had better control effect.

Blue Sky Vine Propagation

How to Grow and Care for Blue Sky Vine (Thunbergia Grandiflora)

Blue Sky Vine Propagation from Seeds

The time of blue sky vine singing propagation is better from October to November, and the temperature is about 20 ℃, which is more conducive to germination. Seedlings can be seen after about 10 days. Move indoors in winter to ensure a smooth winter. If you want to carry out blue sky vine singing propagation in spring, we can choose to blossom in late April in summer. If the sowing time is earlier, it must be carried out indoors to prevent root rot caused by rainy weather. We can use more seedling tray during sowing to ensure sufficient watering. We can cover the surface with a layer of thin fine sand. If we need moisture, we can cover it with glass or white paper. The seedling raising time is about 60 days.

Blue Sky Vine Propagation from Cuttings

The suitable temperature for rooting of blue sky vine is 20 ~ 25 ℃, and the cutting survival rate is higher in may ~ June and August ~ September. Blue sky vine cuttings should be robust and disease-free branches. We can cut them from under the node base, with a length of about 10cm. The cutting mouth should be flat. 2-3 leaves can be reserved at the upper part of the cuttings, and half of them can be cut off if the leaves are too large. During the blue sky vine cutting propagation, we should pay attention to the disinfection of basin soil to prevent the infection and decay of cuttings. The cutting depth is about 1.5cm, which can be placed in the low light place. We should pay attention to spraying water to keep it wet. When the ground temperature is maintained at about 20 ℃, we can take root for about two weeks, and transplant after about 30 days.

Blue Sky Vine Benefits

Blue sky vine plays an important role for people to watch. Whether planted in the courtyard or near the fence, this plant can beautify the courtyard and play an important role for people to watch. In addition, after it is made into a potted plant, its vines climb and grow, with green branches and leaves and bright colors.
Because blue sky vine contains a large number of glycosides, this substance will decompose a large amount of morning glory in bile and intestinal fluid after entering the human body. This substance has an obvious stimulating effect on the human intestine, can accelerate the intestinal peristalsis, and is easy to cause diarrhea.
Diuresis and detumescence is also one of the important effects of blue sky vine. It can improve human renal function and accelerate the metabolism of excess water in the human body. When people have common diseases such as body edema, nephritis edema and ascites caused by liver cirrhosis, they can be treated with blue sky vine, which can quickly reduce the symptoms of body swelling.
Relieving pain and itching is also one of the important effects of blue sky vine. When people are bitten by mosquitoes and their skin is red, swollen and painful, we can directly grind the leaves of blue sky vine and smear them on the affected area, which can quickly reduce the swelling and pain symptoms. In addition, if people are accidentally stung by centipedes or bees, they can also be directly treated with blue sky vine in the future. We can grind the leaves of blue sky vine and apply them to the affected areas externally, which can detoxify, detumescence and quickly relieve pain.
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