Allium cernuum
Other plants you might like if you grow nodding onion.
Abyssinian banana
Ensete ventricosum
acaena
Acaena inermis 'Purpurea'
African fern pine
Afrocarpus gracilior
African lily
Agapanthus africanus
agave
Agave geminiflora RASTA MAN
Akane Apple
Malus 'Akane'
alder-leaved serviceberry
Amelanchier alnifolia 'Regent'
Allegheny serviceberry
Amelanchier laevis
