- USDA hardiness zones: Native to Mexico, this cosmos is an
upright, hairy-stemmed, warm-weather annual that typically grows
to 1-3 tall, but can grow to as much as 6 tall. It produces
daisy-like flowers (to 2.5î diameter) with yellow discs and
yellow rays. Leaves (to 12î long) are 2-3 pinnate with
lanceolate leaflets. Popular cultivars of this species are in
many cases compact to dwarf plants with semi-double to double
flowers and with flower colors ranging from orange to yellow to
scarlet red. Genus name comes from the Greek word kosmos which
means decoration or ornament. Additional common names for this
plant include yellow cosmos and orange cosmos. - Full sun - Dry
to medium Cosmos sulphureus is an annual that is easily grown in
average, medium moisture, well-drained soils in full sun.
Tolerates dryish soils. Also tolerates poor soils. Avoid rich
fertile soils because plants may grow too tall and flop over.
Plant seed in the garden just before last spring frost date.
Seed may also be started indoors about