How to Grow Black-Eyed Susan Vine? Detailed Guide to Growing Methods and Precautions

Black-eyed Susan vine (Thunbergia alata) is a plant introduced and cultivated in China from abroad, grown mainly for its flowers. The flowers of the black-eyed Susan vine are fairly similar to those of chrysanthemums; the flowers are generally commonly seen in orange, and the center of the flower has a black eye, which is how it got its name. Nowadays, the number of people growing black-eyed Susan vine is very large, but before growing it, we still need to understand its growing techniques in advance.

How to Grow Black-Eyed Susan Vine

1. Sowing of black-eyed Susan vine is generally carried out in spring. If conditions permit, it can also be done a bit earlier; the main thing is to ensure a germination temperature of around 20°C. However, autumn sowing is not recommended, because the black-eyed Susan vine is not very cold-tolerant; without insulation measures, sowing would only waste seeds.

2. Black-eyed Susan vine likes fertilizer. Once planted out, it should be watered and fertilized frequently from spring to autumn in order to keep blooming. The potting soil should be nutrient-rich culture soil, and a nitrogen, phosphorus and potassium compound fertilizer can also be used as a base fertilizer. During cultivation, liquid fertilizer should be replenished continuously; if a pollution-free cultivation nutrient solution can be applied regularly, that would be even more suitable. In midsummer, spray the plants with water frequently to raise the ambient humidity.

3. Black-eyed Susan vine needs full sun or slight shade, and likes it relatively warm. The medium can be 2 parts peat and 2 parts leaf mold mixed with 1 part perlite or river sand. It is relatively intolerant of drought; watering in set amounts helps growth, and occasional pruning can make the plants grow more luxuriantly and promote flowering.

Growing Methods for Black-Eyed Susan Vine

1. Environment. Black-eyed Susan vine relatively likes warm and humid environments, and likes to grow in environments with ample sunlight. The optimal growing temperature for black-eyed Susan vine is between 20°C and 30°C. Black-eyed Susan vine is not cold-tolerant; once the temperature falls below 7°C, it will be difficult to maintain normal growth.

2. Fertilizer. Black-eyed Susan vine is a plant that very much likes fertilizer. Once it begins to grow, fertilization work must be carried out strictly, which is beneficial to its flowering.

3. Soil. The growing soil for black-eyed Susan vine should be nutrient-rich soil, and suitable fertilizer can be used as a base fertilizer, with continuous supplementation during the growing process. If fertilization can be carried out regularly, it will be even more beneficial to the plant's growth.

4. Water. Black-eyed Susan vine is not drought-tolerant, so during cultivation it is essential to water in a timely manner. In summer, water should be used as a spray to mist the plant, so as to maintain ambient humidity.

Precautions for Black-Eyed Susan Vine

1. The most suitable sowing time for black-eyed Susan vine should be March each year, and repotting should be carried out step by step according to its growth state. At about the final established stage, a flower pot of about 20 cm is most suitable. Another propagation method for black-eyed Susan vine is cuttings propagation.

2. Pinching can be carried out at an appropriate time, which can cause branching; after flowering, the flower stems can be pruned in a timely manner.

Diseases of Black-Eyed Susan Vine and Control Methods

1. Powdery mildew. Control method: control the amount of nitrogen fertilizer used. Before onset, spray once every two weeks or so with 60% zineb wettable powder at 400-600 times dilution; in the early stage of onset, spray 70% thiophanate-methyl at 1000 times dilution or 15% fenarimol at 1000-2000 times dilution for control.

2. Gray mold. Control method: pay attention to ventilation and light transmission, and control humidity. In the early stage of onset, spraying once every 10 days with 70% thiophanate-methyl at 1500 times dilution or 50% amobam at 800-1000 times dilution can effectively control it.

3. Stem rot. Control method: in the early stage of onset, spray with carbendazim for control, or 65% fenaminosulf at 600-800 times dilution, etc.

The growing methods for black-eyed Susan vine are relatively simple. First, you need to understand its growth habits. In summer, shading treatment should be carried out, and in winter when temperatures are low, temperature regulation should be carried out; otherwise, it may cause the death of the plant.