Biology Question:

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Some flowers, such as Bachelors Buttons, Zinnias, Marigolds, and Petunias last pretty much from the time they start blooming until frost. Others, such as Irises, Tulips, and Daffodils bloom in the spring for a short time. Daylilies bloom in the summer. Mums bloom in the fall. Many varieties bloom longer if you pinch off the old blooms. The best way to choose flowers for the bloom-time you want is to obtain one or more seed catalogs or a book of flowers that gives information on each one.