Cynara cardunculus
Cynara cardunculus cardoon Asteraceae list 10.5 Perennial (short lived) Native to the Mediterranean Zone 7 A towering perennial (up to…
Allium giganteum
Allium giganteum giant purple allium Amarylidaceae list 10.1 Bulb Native to Central Asia Zone 5 Basal rosette of long, flat…
Gunnera manicata
Gunnera manicata giant gunnera Gunneraceae list 2.12 Perennial Native to southern hemisphere Not cold hardy. Will not grow 100 m…