What annuals have blue flowers?

Question:

What annuals have blue flowers?

Answer:

Several annuals have blue blooms and make great additions to containers, baskets, and bedding plantings.  They include: 

Common Name	Genus	Height (inches)	Light	Comments
Dwarf morning glory	Evolvulus glomeratus	6-10	Sun	Non-vining plant; often used in containers
Lobelia	Lobelia erinus	6-10	Sun to part shade	Blue, lavender, and white flowers
Baby blue eyes	Nemophila menziesii	6-10	Sun to part shade	Blue, lavender, and bicolor flowers
Wishbone flowers	Torenia fournieri	6-10	Part shade to shade	Blue/violet, lavender, burgundy, pink, and white
Forget me not	Myosotis	6-12	Sun to part shade	Sky blue flowers with white/yellow centers; reseeds; naturalizes
Petunia	Petunia hybrids	6-15	Sun	Blue-purple flowers and many other colors
Dwarf morning glory	Convolvulus tricolor	8-18	Sun to part shade	Non-vining plant; combinstar-shapedation of blue, gold, and white in each flower
Floss Flower	Ageratum	10-30	Sun to part shade	Taller cultivars are great cut flowers
Cape forget-me-not	Anchusa	12-15	Sun- part shade	Biennial; reseeds
Sapphire flower	Browallia	12-24	Sun – part shade	Blue or white flowers
Love in a mist	Nigella damascena	12-24	sun	Blue, lavender, or white flowers
Tweedia	Oxypetalum caeruleum	12-24	Sun to part shade	Light blue star shaped flowers; milkweed family
Borage	Borago	12-30	Sun	Edible flowers
Cornflower	Centaurea cyanus	12-30	Sun	Blue, pink, or white flowers
Mealycup Sage	Salvia farinacea	15-36	Sun	Blue, white, violet flowers
Larkspur	Consolida	15-48	Sun	Blue, white, and pink flowers; reseeds

Learn more in this article: Blue Blooms for the Midwestern Garden.