Deadhead-Free

[blueyes]

In the life of most annuals, the "goal" is one of setting seed, so there's little impetus for the plant to keep flowering if seeds are being formed. If you remove the faded flowers on plants like marigolds, pansies, calendula and zinnias however, the plant is "tricked" into continuing to put all its energy into continuing to flower.
Not having to deadhead allows one to enjoy gardening even more.

Self-Cleaning Flowers (no deadheading needed)

impatiens [New Guinea and doubles)
begonia (fibrous, angel-wing, waxleaf, doubles, dragon wing)
melampodium (also reseeds but not a huge problem)
Mexican zinnia (Zinnia angustifolia)
crocosmia
Alpine ivy geranium
cascade geranium (Pelargonium sp.)
vinca
lantana
Calibrachoa (trailing petunias--includes the 'Million Bells', 'Liricashower', 'Celebration' and 'Colorburst' series)
selected canna
Anise Hyssop
pink (chinensis 'Carpet Snow Fire')
agastache (Honey Bee Blue)
petunia (many of the new ones, including groundcover types)angelonia
nemesia
Agyranthemum
celosia (plume and wheat types)
diascia
Gaillardia pulchella
Salvia farinacea
verbena (groundcover types)
Osteospermum
toothache plant (Spilanthes )
Tithonia
spider flower (Cleome)
rudbeckia
Golden shrimp plant
Balcon geraniums