7/23/2019 Cosmos Sulphureus

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BOTANICAL NAME: Cosmos sulphureus(KOS mos sul fer EE us)

COMMON NAME: Yellow Cosmos

NAME DERIVATION:  From the Greekword kosmos (beautiful, ornament) andsulphureus (refers to sulfur yellow ower

!olor)"

FAMILY: 

 Asteraceae

NATIVE RANGE: #e$i!o 

HARDINESS:  %"&" ' true annual

HABIT AND SIZE:  priht, *+ tall and spread of ' -+" .abit is loose and open"

FLOWERS: /riht yellow, !omposed of dis! (the !enter owers) and ray (the outer

petals) owers" 0he dis! owers are !onsistently yellow1 the ray owers !an 2ary fromshades of sulphur yellow to orane and red" Flowers are often semi3double, sometimesdouble"

BLOOM TIME:  4une 3 September

FOLIAGE: 5innate or bipinnate, opposite, *6 lon with narrow lobes and hairy marins"Stems are 73sided and bran!hed"

CULTURAL NEEDS:  Full sun, e$!ellent drainae" 8oes not like o2erly fertile soil" 9erydrouht tolerant"

MAINTENANCE NEEDS: 8eadhead for !ontinuous bloom" 0he stems may need to bepin!hed ba!k if rowin too tall and oppy" :ea2e some seed on the plants late in theseason and allow them to self sow"

POTENTIAL PITFALLS: Stem !anker, powdery mildew, aphids" &!tually ;uite immuneto pests and diseases"

GARDEN USES:  #i$ed border, meadows, buttery ardens, !ut owers" 0ends to bedeer3resistant"

PROPAGATION: 8ire!tly sow seeds after daner of frost is past" Can also start indoors7 ' < weeks prior to last frost date"

 

7/23/2019 Cosmos Sulphureus

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OTHER SPECIES AND CULTIVARS:

=/riht :ihts+ ' rows - ' 7+ tall, owers in shades of brilliant orane, red, old

=Cosmi! >ed+ ' smaller (rows to about *6 tall), dark reddish3orane owers

Cosmos bipinnatus is similar to C" sulphureus, but the !olor rane is white to mau2e topink and the foliae is la!ier" 0here are do?ens of !ulti2ars of C" bipinnatus"