Geranium ROZANNE
‘Gerwat’
rozanne geranium
geraniaceae
Violet-blue flowers with a white eye;
palmately lobed foliage
15–20 in. high; 2–3 ft. wide
Full sun–part shade
Blooms June–October
Zones 5–8
pruning rozanne looks great all
season and has set the new standard
for geraniums. It starts blooming a
little later than other geraniums, but
then goes nonstop until frost, even
without pruning. Plants can be shaped
at any time if they outgrow their
allotted space; they will quickly
recover and pick up where they left off.
Occasional deadleafing may be needed
in hot and dry locations. Cut back dead
foliage in late fall or in early spring
before growth resumes. This is asterile hybrid that sets no seed.
other maintenance Amazingly
adaptable, rozanne can take sun or
part shade—plants in full shade flower
well but get floppy. A good,
humus-rich, moist but well-drained
soil will produce the lushest plants,
but rozanne isn’t too fussy and has a
fair degree of drought tolerance.
Staking is rarely necessary. Plants
spread more than you might expect
and can be used as groundcover.
related plantS Geranium ‘Orion’
is a hybrid that looks similar to
rozanne and performs similarly, but
its flowers are bigger and bluer. It also
frequently displays long-lasting red
fall foliage, a feat which rozanne
does only rarely. It may reach up to 6 ft.
wide. If plants get scraggly after the
summer bloom, cut back heavily for
autumn rebloom. This plant was given
a 4-star rating by Richard Hawke at the
Chicago Botanic Garden Plant Trials. Geranium rozanne ‘Gerwat’