I agree it's more due to temperature than light. I have a dark purple plant on a stand. In summer, all the flowers are purple, in winter or spring, it has white streaks.
下面引用由Cowan在 2004/04/28 09:45am 發表的內容: I agree it's more due to temperature than light. I have a dark purple plant on a stand. In summer, all the flowers are purple, in winter or spring, it has white streaks.