As one of the flowering plants you should deadhead, cosmos respond very well to the removal of spent flowers. Deadheading in the garden isn't about letting your plants listen to the Grateful Dead.

Cosmos are one of the hardest-working annual flowers in the summer garden. Easy to grow, drought tolerant once established, and loved by pollinators, they can flower continuously from early summer ...

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Vibrant pink and white cosmos flowers in a yard - Boyloso/Getty Images As one of the flowering plants you should deadhead, cosmos respond very well to the removal of spent flowers. Deadheading in the ...