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.
Deadheading, the removal of spent blooms, encourages new growth and more flowers. Annuals like zinnias and marigolds benefit from frequent deadheading, while others like impatiens are self-deadheading ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results