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The fastest growing flowering plants are the annuals.

Some of the more common annuals are:

-Cosmos

-Marigolds

-blue flax

-Sunflowers

-Alyssum

-Poppies

-Snapdragons

-Corn cockles

One of my personal favorites which grows in a period of 6-9 weeks is the Zinnia flower! ;) Check it out, it comes in many colors! <--- Added to the original answer, i couldn't resist :P

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13y ago

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