Wuyousu is a newly coined name for this flower, used to distinguish it from Yushen Su. The meaning of Yushen Lan can be interpreted as follows: the character "yu" (fish) indicates that the outer petals are fish-shaped rather than bamboo-leaf-shaped, and the character "shen" indicates that the transparency is like that of a fish skull or fish roe. In that case, Rao's Yushen Dagong is not the Yushen recorded in Zhao Shigeng's Jinzhang Lanpu (1233 AD) from the Song Dynasty...
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For Sijilan, Xiahailan and others, the time from flower buds emerging from the soil to blooming is not long, as short as about 20 days and as long as about 30 days. Management during this period is very important. But it is all about paying attention to fertilizer and water management and light management during the vegetative growth period and reproductive growth period! Flower buds turning black, scorching, dropping and dying have many causes. Most are caused by excessive moisture, excessive fertilizer, and stuffy, poorly ventilated conditions, and there is also the possibility that it is a precursor to stem rot. It may also be caused by insect bites! Generally, if flower buds can emerge, it shows that nutrition is sufficient, and there is no need to continue applying fertilizer at the roots; only foliar topdressing is needed. Before flowering, water and fertilizer should be controlled, and more sunlight should be given appropriately. When the flower buds are forming in rows, attention should be paid to withholding water 1-2 times. For Chunhuilan, after the flower buds emerge from the soil, there is a bud gestation period; from the Beginning of Autumn to before the Winter Solstice, topdressing with phosphorus and potassium fertilizer should be strengthened. This promotes the flower buds to swell and grow to full size. Whether applying fertilizer to the roots or spraying a dilute fertilizer, the interval should be controlled at 7-10 days. During the vegetative growth period of new shoots, nitrogen-based multi-element fertilizer should be the main type, to promote robust growth and achieve the goal of disease resistance and drought resistance. Therefore, the inability of flower buds to bloom normally is inseparable from earlier management.
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