These perennials wont grow well if you plant them before winter.
Canna Lilies
Althoughcanna lilies(Cannaspp.)
are treated as annual plants in cold climates, these flowering plants can be kept as perennials inUSDA Zones710.
Credit: David Patterson
For better results, plant these delicate beauties inspring after the danger of frost has passed.
False Indigo
Compared to canna lilies and tender salvias,false indigo (Baptisiaspp.)
is a relatively hardy plant, but it still grows better when planted in spring.
Credit: Blaine Moats
False indigo is cold-hardy in Zones 38.
Bougainvillea
Bougainvillea plants(Bougainvilleaspp.)
are famous for their vibrant flowers that bloom from spring through fall in Zones 9-11.
Credit: Marty Baldwin
Dahlias
Lynn Karlin
In cold areas, dahlia tubers (Dahliaspp.)
Mandevilla
A heat-loving plant,mandevilla(Mandevillaspp.)
is mostly grown as an annual in North America, although some gardenersbring potted mandevilla indoors in winter.
Credit: Blaine Moats
Lavender
Growers in mild climates may have success plantinglavender(Lavandulaspp.)
They are cold-hardy in Zones 59.
Rosemary
Like lavender,rosemary(Rosmarinus officinalis)prefers relatively dry conditions.
Credit: Denny Schrock
In wet weather, it can develop root rot or issues with powdery mildew.
This lovely night-bloomer is cold-hardy only in Zones 710.
Credit:Lynn Karlin
Credit: Alison Miksch
Credit: Bob Stefko
Credit: Denny Schrock
Credit:Dean Schoeppner
