This text is talking about the lights in 广州湛涌村。
由于如秋后,广州的日照时间缩短,自花苗上盆起,花农们就会利用电灯补光来延迟花期。
This bit confused me (I'm easily confused). Is it right that 自 ... 起 work together as 'from when' or 'starting from when' here?
自...起 since
自花苗上盆起
starting from when the seedlings are put in their pots
If this is right, you can clearly see the power of Chinese to express ideas in a very concise manner!