warm season annuals - uaex.edu · warm season annuals •plant after the danger of frost is past...
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Annuals
Master Gardener Series
2004
University of Arkansas
Cooperative Extension Service
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Warm Season Annuals
• Plant after the danger of frost is past – in
south Arkansas after April 1, in central
Arkansas after April 10 and April 20 in
north Arkansas
• Space plants 12 to 18 inches apart
• Fertilize at planting, and periodically
throughout season.
• Water as needed.
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Annuals for the
summer sun – 6 hours or more
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Lobularia maritima ‘Rosie O’ Day’ Sweet Alyssum
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Dusty Miller
(Centaurea cineraria)
• Plant as a winter
annual with pansies or
in spring with warm
weather plants
• Will overwinter down
to zero
• Good for edging and
background
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Periwinkle or Vinca • Loves the heat
• Glossy green
foliage
• self-cleaning
flowers.
• Stem canker
problems
more common
with overhead
watering.
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‘Cooler Series’ Periwinkle
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Plumed Cockscomb Crested Cockscomb
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Lantana
• Loves the heat
of summer;
tolerates drought
• Used as an
annual
• May overwinter
• ‘New Gold’ was
a 2000 Arkansas
Select winner
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Variegated Lantana
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Butterfly Pentas
2002 Arkansas Select
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Petunias
• Belong to the potato family and do best in
good soil before the summer gets too hot
• Cut plants back if they stop flowering
• All commercial cultivars are F1 hybrids
• New “Wave” type are more vigorous and
tolerate heat better than most
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Wave petunias are
heavy feeders, so
fertilize at least
monthly to keep
them blooming
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Calibracoa
- 2001 Arkansas
Select
- Similar to
petunia but with
smaller blooms
- In protected
areas may
overwinter
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Portulaca grandiflora Moss Rose
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Portulaca oleraceae Purslane
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Scarlet Sage
Salvia splendens
• Summer flowering
annual responds well to
water and fertilizer
• Pinching heads off will
keep the plants in bloom
• Loves the heat of an
Arkansas summer
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Ageratum houstonianum Floss Flower
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Melampodium
• 1999 Arkansas Select
winner
• Loves heat – a Texas
native wildflower
• Self cleaning
• Depending on variety
grows 8 to 18 inches
tall
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Marigolds (Tagetes)
• T. patula (French)
• Plants small stature
under 16 inches
• Blooms smaller –
often yellow or orange
• Easy to transplant and
grow
• Spidermite magnet
• T. erecta (African)
• Plants 24 to 36 inches
tall
• Blooms 3 to 4 inches
across and mostly
yellow
• Often late flowering
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Tagetes patula
French Marigold
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Garden Zinnia
• Full sun plant that is
mainly grown from
seeds planted directly
in the garden
• Can bloom in 5
weeks from seed
• Powdery mildew is a
major disease
problem.
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Zinnia angustifolia ‘Crystal White’ a 1998 Arkansas Select
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ZZ. elegans x Z. angustifolia
(Profusion series)
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Ipomea batas ‘Marguerite’ and ‘Blackie’
Sweet Potato Vine
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Marguerite Sweet Potato Vine
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Pelargonium x hortorum
Garden Geranium
• Grown from cuttings
or seeds
• Best in pots in the
cooler weather of
spring
• Not a good summer
bedding plant in the
south because of heat
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Flowers for the
Shade Garden
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Impatiens or Sultanas
• Best flowering annual
for the shade
• Grows quickly from
seed
• Flowers all summer
• May reseed in a
favorable site
• Dwarf forms available
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Sultana (Impatiens)
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New Guinea Impatiens
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Wax Begonia • Grows best
in shade but
will take full
sun
• Slow from
seed so must
be grown as
a transplant
• Flowers in
pink, red or
white
• Pest free
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Dragonwing
Begonia 2001 Arkansas Select
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Coleus - the foliage plant for sun or shade
• Many fancy leafed forms
• Grows well in the soil or in containers
• Sensitive to cold temperatures
• Watch for mealybugs
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Cool
Season
Annuals
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Dianthus chinensis ‘Snowfire’
• Plant in fall or
spring
• Blooms fall
through spring
• Shear back in
summer for fall
bloom
• Sensitive to
water
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Snapdragon
(Antirrhinum majus)
• Winter annual in
zone 7 and south
• Used as a cut
flower
• Usually will not
make it through our
hot summers and
remain in bloom
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Ornamental Kale plant in September for best show
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Ornamental Kale is hardy to about 15 degrees F
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Pansy • Winter annuals
• Pansies are the most
popular winter color
plant south of zone 6
• Usually ineffective
after May 15 in most
years as plants
stretch out as nights
warm up
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Viola flower compared to a Pansy flower
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Plant Pansies before November 1 in North Arkansas.