用环剥树皮等方法可以诱导多倍体无性系提早开花。
Girdling and other treatments can induce polypoid plants to flower earlier.
植物学家Cristol Fleming认为，由于温室效应全球变暖，导致了一些植物开花的时间提早了将近两个月之多。
Cristol Fleming says she believes the appearance of flowers up to two months early is down to the changes created by global warming.
我们有些人可能会养一些多花水仙和球状水仙开花，它们开出的串串白色花朵能令春天提早到来。
Some of us may have some Paperwhite Narcissus bulbs in bloom and their highly scented white flower clusters can lift the spirits.
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