Celtuce 菜心 ( 萵筍 ) Celtuce

播種期 ：4月到 8月份
發芽適溫： 15~20℃
生長適溫：12~20℃
採收：  ：± 90~120天

最初的生長類似於長葉萵苣，但在收穫較低的葉子後，植物仍保持在堅固的莖上！ 嫩莖最高可達50厘米，直徑可達4-7厘米，切忌過老，以防木質化。 這些植物像棕櫚樹一樣優雅地炫耀！ 在亞洲，莖作為切片生蔬菜非常受歡迎！ 燉和炒也可以，像蘆筍一樣柔軟。 建議：每年播種幾次，以始終保持新鮮的莖幹。
播種方法
菜心生長發育的適溫為15～20℃。不同生長期對溫度的要求不同，種子發芽和幼苗生長適溫為12～20℃；葉片生長期需要的溫度稍低，適溫為15～20℃，15℃以下生長緩慢，30℃以上生長較困難。菜薹形成期適溫為15～20℃，在晝溫為20℃，夜溫為15℃時，菜薹發育良好，約90～120天可形成質量好、產量高的菜薹；在15～20℃時，菜薹發育較快，但菜薹細小，質量不佳。在25℃以上發育的菜薹質量更差。
菜心屬長日照植物，但多數品種對光週期要求不嚴格，但充足陽光會有利於生長發育。在肥沃疏鬆的壤土上生長良好。花芽分化和菜薹生長快慢主要受溫度影響。
菜心就是萵筍, 台灣稱為嫩莖萵苣，台語稱為萵菜心（A菜心）

Sowing period: April to August
Suitable temperature for germination: 15~20℃
Suitable temperature for growth: 12~20℃
Harvest: : ± 90~120 days

The initial growth resembles romaine lettuce, but after the lower leaves are harvested, the plants remain on strong stems! The tender stems can reach a maximum of 50 cm and a diameter of 4-7 cm. They should not be too old to prevent lignification. These plants show off gracefully like palm trees! In Asia, the stems are very popular as a sliced raw vegetable! Stewed and sautéed are also fine, soft as asparagus. Suggestion: Sow several times a year to always have fresh stems.
sowing method
The optimum temperature for the growth and development of Chinese cabbage is 15-25°C. Different growth periods have different temperature requirements. The optimum temperature for seed germination and seedling growth is 25-30°C; the temperature required for leaf growth is slightly lower, and the optimum temperature is 15-20°C. Growth is slow below 15°C, and growth is slower above 30°C. difficulty. The suitable temperature for the formation of cabbage sprouts is 15-20°C. When the daytime temperature is 20°C and the night temperature is 15°C, the cabbage sprouts develop well, and good quality and high-yield cabbage sprouts can be formed in about 20-30 days; At 25°C, the cabbage sprouts grow quickly and can be harvested in 10-15 days, but the cabbage sprouts are small and of poor quality. The quality of cabbage sprouts developed above 25°C was even worse.
Celtuce is a long-day plant, but most varieties have no strict requirements on sunlight, but sufficient sunlight will be beneficial to growth and development. Grows well on fertile loose loam soil. The flower bud differentiation and the growth rate of cabbage sprouts are mainly affected by temperature.