Spring or early summer, before the equinox
People also ask
What are the long day and short day plants?
Long-day and short-day plants. Two familiar short-day plants are chrysanthemum and poinsettia. These plants will initiate flowers when the day lengths are shorter than their critical day length: Chrysanthemum (some types) critical day length: 15 hrs. Poinsettia critical day length: 10 hrs.
Which plants initiate flowers when the day length is longer?
Both these plants will initiate flowers when the day lengths are longer than their particular critical day length: Dill critical day length: 11 hrs. Spinach (some types) critical day length: 13 hrs. Two familiar short-day plants are chrysanthemum and poinsettia.
What is long-day flowering?
Copyright 1999, National Gardening Association. All Rights Reserved. Every plant for which flower initiation is light-dependent (and not all plants are) has a critical day-length associated with it. The term long-day describes plants that begin forming flower buds when the days are longer than their critical day length.
Do flowers bloom on different days of the week?
And some plants form flowers regardless of day length. Botanists call these day neutral plants. Tomatoes, corn, cucumbers and some strawberries are day-neutral. Some plants, such as petunias defy categorization, said VanDerZanden. They flower regardless of day length, but flower earlier and more profusely with long days, she said.