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Common and Latin names |
Plant Type, Hardiness |
Blooming Time |
 |
Queen of the night, Dutchman's pipe cactus
Epiphyllum oxypetalum |
Tropical plant, zone 10-11
Link to Epiphyllum page
More information |
Spring (night) |
 |
Quince, Flowering quince
Chaenomeles sp. |
Shrub, zone 5-9
Grow quince for bonsai |
Spring |
 |
Rainbow shower
Cassia fistula x C. javanica |
Tropical flowering tree, zone 10 |
Spring |
 |
Rain lily
Zephyranthes sp. |
Bulb, zone 8-11
More information |
Spring |
 |
Rangoon creeper
Quisqualis indica |
Tropical vine, zone 10-11 |
Summer |
 |
Ranunculus
Ranunculus sp. |
Bulb, zone 8-10
More information |
Spring to Summer |
 |
Rattlesnake master
Eryngium yuccifolium |
Perennial, zone 4-8 |
Summer |
 |
Redbud
Cercis canadensis |
Flowering tree, zone 4-9
More information |
Spring |
 |
Redbud, White Eastern Redbud
Cercis canadensis var. alba |
Flowering tree, zone 4-9
More information |
Spring |
 |
Red Calliandra
Calliandra calothyrsus |
Tropical tree, zone 10-11
More information |
Spring |
 |
Red ginger
Alpinia purpurata |
Tropical bulb, zone 9-11
More information |
All seasons |
 |
Red hot poker
Kniphofia uvaria |
Desert plant, zone 5-9
More information |
Summer |
 |
Red hot poker vine
Norantea guianensis |
Tropical vine, zone 10-11 |
Spring |
 |
Rhododendron
Rhododendron sp. |
Shrub, hardiness varies with species
Rhododendron Society |
Spring |
 |
Rose
Rosa spp. |
Shrub, zone 5-9
Rose page |
Spring |
 |
Rose of Sharon
Hibiscus syriacus |
Shrub, zone 5-8 |
Summer |
 |
Rose mallee
Eucalyptus rhodantha |
Tropical, zone 7-10
More information |
Spring in US |
 |
Rose turtlehead
Chelone obliqua |
Perennial, zone 5-9 |
Summer |
 |
Rosinweed sunflower
Helianthus silphioides |
Perennial, zone 4-9 |
Fall |
 |
Royal poinciana
Delonix regia |
Tropical flowering tree, zone 10-11
More information |
Summer |
 |
Rudbeckia, Coneflower
Rudbeckia hirta. |
Perennial, zone 4-8 |
Summer |
 |
Ruellia, Dwarf Bluebell, Mexican petunia
Ruellia brittoniana |
Perennial, zone 7-10
Ruellia for Southern gardeners |
Spring to Fall |