Many long-day plants germinate in summer and flower:

Name: Many long-day plants germinate in summer and flower:
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Many long-day plants require a certain amount of light to flower and usually germinate in the summer months when day length is longer. They then require a period of cold temperatures, known as vernalization, before they can flower. This period of cold is typically over the winter months, meaning the plants will flower the following spring.

Many Long-Day Plants Germinate in Summer and Flower