In selecting summer spinach varieties, it's important to choose types that are not too late in the summer sun, have strong heat resistance, and grow quickly. Currently, several popular summer spinach varieties are cultivated across different regions of the country.
1. **Almighty Spinach**: Introduced from Hong Kong, this variety is known for its heat and cold resistance, wide adaptability, and strong winter tolerance. It grows rapidly at temperatures ranging from 3°C to 28°C. The plant stands upright, with a height of 30–35 cm. Each plant has 7–9 leaves, weighing about 100 grams. The leaves are dark green, thick, smooth, and measure 30–35 cm in length and 10–15 cm in width. They have low astringency and a soft texture. The growth period is 80–110 days, and it is resistant to downy mildew, anthracnose, and viral diseases.
2. **Huasong No. 1**: A hybrid developed by Huazhong Agricultural University, this variety matures quickly, with a growth period of 40–60 days. The plant is semi-erect, reaching a height of 30 cm. Its leaves are scorpion-shaped with deep notches, and they are broad and of high quality. It has good heat resistance, is resistant to downy mildew and viral diseases, and produces high yields.
3. **Guangdong Round Leaf Spinach**: Introduced from Guangdong, this variety has thornless seeds and oval leaves. It is highly heat-resistant and grows quickly but is not very cold-tolerant. It must be harvested before the cold season begins.
4. **United No. 1**: A hybrid bred by Shanghai Agricultural College, this variety has thorny seeds and semi-open plants. Its leaves are arrow-shaped, large, and thick, growing quickly even in hot and rainy conditions. However, it has a long seed dormancy period, and germination rates may be low at high temperatures. It can be harvested 30 days after sowing.
5. **Spring and Autumn Big Leaf**: Introduced from Japan by Shanxi Province, this variety is robust with clustered leaves. The leaves are long and oval, with a blunt tip and thick texture. Each plant weighs about 200 grams, and each leaf weighs around 20 grams. It has no strong smell and excellent quality. It is resistant to diseases, heat, and late bolting, with a growth period about 10 days longer than general round leaf spinach.
6. **Late Big Leaf**: A new variety selected by Shanxi Agricultural University, this spinach has a growth period of over 50 days. The plant reaches a height of 25 cm and a spread of 50 cm. The leaves are wide and arrow-shaped, measuring 32–40 cm in length and 14–18 cm in width, with very few fibers. It has thornless seeds and bolts 15–20 days later than other varieties. It typically produces more than 2,500 kg per mu (about 667 square meters).
These varieties offer farmers a range of options depending on their climate, soil conditions, and market demand. Whether you're looking for fast-growing, heat-resistant, or high-yield varieties, there is a suitable option available for summer spinach cultivation. With proper care and management, these varieties can thrive and provide a steady supply of fresh, nutritious greens throughout the warmer months.
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