List of Garden Perennials that start with the letter 'G', such as Gaillardia, Gaura and Gentiana too. These perennial plants are 'g'reat! Enjoy!
Gaillardia aestivalis var. winkleri 'Grape Sensation'
Item #: 7637
Zones: 7a to 9b, possibly colder
Dormancy: Winter
Height: 24" tall
Culture: Sun
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Gaura lindheimeri 'Pink Cloud'
Item #: 3989
Zones: 6a to 10b, possibly colder
Dormancy: Winter
Height: 30" tall
Culture: Sun
Origin: United States Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Genista sagittalis
Item #: 3975
Zones: 4a to 8b
Dormancy: Evergreen
Height: 8" tall
Culture: Sun
Origin: Balkans
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Gentiana andrewsii 'Milk Bottles'
Item #: 9979
Zones: 3a to 7b
Dormancy: Winter
Height: 18" tall
Culture: Sun to Light Shade
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Gentiana 'True Blue' PP 20,433
Item #: 8505
Zones: 4a to 8b
Dormancy: Winter
Height: 18" tall
Culture: Sun to Part Sun
Origin: Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Gentiana villosa 'Thomasville'
Item #: 11765
Zones: 6a to 9b, guessing
Dormancy: Winter
Height: 8" tall
Culture: Light Shade
Origin: United States
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Geranium 'Dragon Heart'
Item #: 8661
Zones: 5a to 7b, at least
Dormancy: Winter
Height: 24" tall
Culture: Sun to Part Sun
Origin: Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Geranium 'Rozanne' PP 12,175
Item #: 5111
Zones: 5a to 8b
Dormancy: Winter
Height: 15" tall
Culture: Sun to Part Sun
Origin: Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Gladiolus communis ssp. byzantinus 'Cruentus'
Item #: 5857
Zones: 6a to 9b, at least
Dormancy: Summer, Fall
Height: 24" tall
Culture: Sun to Part Sun
Origin: Mediterranean Europe
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Gladiolus dalenii 'Boone'
Item #: 8854
Zones: 6a to 9b, possibly colder
Dormancy: Winter
Height: 48" tall
Culture: Sun
Origin: Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Gladiolus dalenii 'Halloweenie'
Item #: 5990
Zones: 7a to 9b, at least
Dormancy: Winter
Height: 60" tall
Culture: Sun to Part Sun
Origin: South Africa
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Gladiolus 'Lilac and Chartreuse'
Item #: 12806
Zones: 7a to 10b, possibly colder
Dormancy: Winter
Height: 48" tall
Culture: Sun
Origin: Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Gladiolus 'Robeson Red'
Item #: 9159
Zones: 6a to 9b, guessing
Dormancy: Winter
Height: 48" tall
Culture: Sun
Origin: Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Gladiolus 'Rosy Cheeks'
Item #: 7006
Zones: 7a to 9b, at least
Dormancy: Summer
Height: 24" tall
Culture: Sun to Part Sun
Origin: Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Glaucium grandiflorum
Item #: 9880
Zones: 7a to 10b, possibly colder
Dormancy: Evergreen
Height: 36" tall
Culture: Sun to Part Sun
Origin: Turkey
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Gloxinia 'Little Red'
Item #: 11082
Zones: 7b to 9b
Dormancy: Winter
Height: 16" tall
Culture: Part Sun to Light Shade
Origin: Hybrid
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Gloxinia nematanthodes 'Evita'
Item #: 5556
Zones: 7b to 9b, at least
Dormancy: Winter
Height: 12" tall
Culture: Part Sun to Light Shade
Origin: Argentina
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Gymnaster savatieri 'Edo Murasaki'
Item #: 9582
Zones: 5a to 8b
Dormancy: Winter
Height: 15" tall
Culture: Part Sun to Light Shade
Origin: China, Japan, Korea
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?
Gymnocalycium deeszianum
Item #: 13031
Zones: 7b to 10b
Dormancy: Evergreen
Height: 3" tall
Culture: Sun
Origin: Argentina
Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?