Flower color
Blue flowers
250 garden plants with blue blooms, with bloom times, hardiness zones, and sun needs. Build a blue color scheme that lasts across the season.
Showing 1 to 60 of 250 plants
How this list is made
Derived from each plant's flower color tags and bloom colors, as stored in the BloomsEye library, which was written with AI assistance. Of these 250 plants, 209 have been checked against outside sources (21 fully verified); the rest have not been checked yet, and each plant's own page says which. The cards are AI-generated illustrations.
True blue is close to the rarest thing a flower can be, and most garden blue is really violet caught at the right angle. 250 plants here answer to it, fewer than any color but green. Blue also recedes harder than anything else: a single blue plant at twenty feet simply disappears, so it has to be planted in mass before it registers at all. Planted that way it does two things nothing else does. It cools a hot scheme on contact, and it makes orange and yellow look twice as bright, sitting opposite them. Much of what is blue here is also small and early, as the blue flowers guide shows: squill, grape hyacinth, windflower.
Related guides
Agapanthus
Agapanthus
Full sunZones 7–112.5 ftModerate
Listed as toxic to dogs and cats
Ageratum
Ageratum houstonianum
Full sunZones 10–1112 inModerate
Alpine Squill
Scilla bifolia
Full sunZones 3–84 inModerate
Angelface Blue Summer Snapdragon
Angelonia angustifolia 'Anblu140'
Full sunZones 10–111.5 ftModerate
Appalachian Blues Skullcap
Scutellaria 'Appalachian Blues'
Part shadeZones 4–91.5 ftModerate
FoliageAquavita Juniper
Juniperus virginiana 'FARROWJVBF'
Full sunZones 4–912 ftLow
Arkansas Bluestar
Amsonia hubrichtii
Full sunZones 5–82.5 ftModerate
Astra Double Blue
Platycodon grandiflorus 'Astra Double Blue'
Full sunZones 3–810 inModerate
Azure Rush Geranium
Geranium 'Azure Rush'
Part sunZones 5–81.5 ftModerate
Azurri Blue Satin Rose of Sharon
Hibiscus syriacus 'DVPazurri'
Full sunZones 5–910 ftModerate
FoliageBaby Blue
Picea pungens 'Baby Blue'
Full sunZones 2–720 ftModerate
Bachelor's Button
Centaurea cyanus
Full sunZones 2–112.5 ftLow
Balloon Flower
Platycodon
Full sunZones 3–82 ftModerate
FoliageBar Harbor Juniper
Juniperus horizontalis 'Bar Harbor'
Full sunZones 3–88 inLow
Beekeeper Bluebeard
Caryopteris × clandonensis 'Minigold'
Full sunZones 5–92.5 ftModerate
Bernadine Clematis
Clematis 'Evipo061'
Part shadeZones 4–94.5 ftModerate
Listed as toxic to dogs and cats
Beyond Midnight Bluebeard
Caryopteris × clandonensis 'CT-9-12'
Full sunZones 5–92.5 ftLow
Big Bluestem
Andropogon gerardi
Full sunZones 4–96 ftLow
Big Daddy Hosta
Hosta 'Big Daddy'
Part shadeZones 3–82.5 ftModerate
Listed as toxic to dogs and cats
Bigleaf Hydrangea
Hydrangea macrophylla
Part sunZones 5–95 ftHigh
Listed as toxic to dogs and cats
FoliageBlue Angel
Hosta 'Blue Angel'
Full shadeZones 3–93 ftModerate
Listed as toxic to dogs and cats
FoliageBlue Arrow Juniper
Juniperus scopulorum 'Blue Arrow'
Full sunZones 4–913 ftLow
Blue Bacopa
Chaenostoma cordatum
Part sunZones 9–116 inModerate
Blue Bird
Delphinium 'Blue Bird'
Full sunZones 3–75 ftModerate
Listed as toxic to dogs and cats
Blue Bird
Hibiscus syriacus 'Oiseau Bleu'
Full sunZones 5–98 ftModerate
Blue Canterbury Bells
Campanula medium
Full sunZones 4–102.5 ftModerate
Blue Chiffon
Hibiscus syriacus 'Blue Chiffon'
Full sunZones 5–98 ftModerate
Blue Chip
Buddleia 'Lo & Behold Blue Chip'
Full sunZones 5–92.5 ftLow
FoliageBlue Chip Juniper
Juniperus horizontalis 'Blue Chip'
Full sunZones 3–98 inLow
Blue Crown Passionflower
Passiflora caerulea
Full sunZones 6–913 ftModerate
Listed as toxic to dogs and cats
Blue Fan Flower
Scaevola aemula
Full sunZones 10–118 inModerate
FoliageBlue Feathers Hinoki Cypress
Chamaecyparis obtusa 'Ivan's Column'
Full sunZones 4–84 ftModerate
Blue Fescue
Festuca glauca
Full sunZones 4–812 inLow
Blue Fortune Agastache
Agastache 'Blue Fortune'
Full sunZones 5–103 ftModerate
Blue Freesia
Freesia 'Blue Heaven'
Full sunZones 9–101.5 ftModerate
Blue Giant
Scilla forbesii
Full sunZones 3–86 inModerate
Blue Glitter Sea Holly
Eryngium planum 'Blue Glitter'
Full sunZones 5–82.5 ftLow
Blue Globe Onion
Allium caeruleum
Full sunZones 3–92 ftModerate
Listed as toxic to dogs and cats
Blue Glow Globe Thistle
Echinops bannaticus 'Blue Glow'
Full sunZones 3–83.5 ftModerate
Blue Hill
Salvia × sylvestris 'Blauhügel'
Full sunZones 4–81.5 ftLow
Blue Horizon
Ageratum houstonianum 'Blue Horizon'
Full sunZones 10–112 ftModerate
Blue Ice Blue Star
Amsonia 'Blue Ice'
Full sunZones 4–91.5 ftModerate
Listed as toxic to dogs and cats
Blue Indigo
Baptisia australis
Full sunZones 3–93.5 ftModerate
Listed as toxic to cats
FoliageBlue Italian Cypress
Cupressus sempervirens 'Glauca'
Full sunZones 7–1039 ftLow
Blue Ivory Hosta
Hosta 'Blue Ivory'
Part shadeZones 3–81.5 ftModerate
Listed as toxic to dogs and cats
Blue Jacket
Hyacinthus 'Blue Jacket'
Full sunZones 4–810 inModerate
Listed as toxic to dogs and cats
Blue Jay
Delphinium 'Blue Jay'
Full sunZones 3–75 ftModerate
Listed as toxic to dogs and cats
Blue Jean Baby Russian Sage
Salvia yangii 'Blue Jean Baby'
Full sunZones 4–82.5 ftLow
Blue Larkspur
Consolida ajacis
Full sunZones 2–113 ftModerate
Listed as toxic to dogs and cats
Blue Lisianthus
Eustoma grandiflorum
Full sunZones 8–111.5 ftModerate
Blue Marvel
Salvia nemorosa 'Blue Marvel'
Full sunZones 4–91.5 ftLow
Blue Mirror
Delphinium grandiflorum 'Blue Mirror'
Full sunZones 3–71.5 ftModerate
Listed as toxic to dogs and cats
Blue Mistflower
Conoclinium coelestinum
Part shadeZones 5–102 ftModerate
FoliageBlue Moon Sawara Cypress
Chamaecyparis pisifera 'Blue Moon'
Full sunZones 4–82.5 ftModerate
Blue Moon Wisteria
Wisteria macrostachya 'Blue Moon'
Full sunZones 3–920 ftModerate
Listed as toxic to dogs and cats
Blue Moon Woodland Phlox
Phlox divaricata 'Blue Moon'
Part shadeZones 4–812 inModerate
Blue Mouse Ears Hosta
Hosta 'Blue Mouse Ears'
Part shadeZones 3–812 inModerate
Listed as toxic to dogs and cats
Blue Oat Grass
Helictotrichon sempervirens
Full sunZones 4–82.5 ftLow
FoliageBlue Pacific Juniper
Juniperus conferta 'Blue Pacific'
Full sunZones 6–912 inLow
Blue Pansy
Viola wittrockiana 'Blue'
Part sun8 inModerate8 in wide
Blue flowers by season
A plant is counted in every season it flowers in, so a long-flowering one appears in more than one. The named picks are the plants whose whole flowering sits in that season, not the ones that only pass through it.
Spring
March, April and May
114 plants
Summer
June, July and August
174 plants
Fall
September, October and November
79 plants
Blue flowers for shade
59 of these 250 plants will flower in less than a full day of sun.
The longest-blooming blue flowers
31 of these plants hold their flowers for 5 months or more. These are the longest of them.
Blue flowers by height
Mature height, in the three bands a border is planted in. Anything over 10 ft is structure rather than a border plant, and a climber is sized by whatever it is growing up, so both sit this out.
Front of the border
under 12 in
45 plants
Middle of the border
12 in to 3 ft
136 plants
Back of the border
3 ft and up
45 plants
Keep exploring
Design your garden
Drop plants onto a 3D plan, see how they fill in, and watch the whole garden bloom across the year.