Roses

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Roses
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Classification of roses

• Modern garden roses
• Old garden roses
• Species roses

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Types of modern roses

• Hybrid teas
• Grandifloras
• Floribundas
• Shrub
• Climbing
• Rambling
• Patio
• Miniatures

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Grandiflora (large-flowered bush)
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Floribunda (cluster-flowered bush)
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Shrub roses

• David Austin (English)
• Dr. Griffith Buck
• Knockout
• Belindas Dream

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Old (European) garden roses

• Alba
• Bourbon
• Centifolia
• China
• Damask
• Gallicas
• Hybrid musk
• Moss
• Noisette
• Portland
• Tea

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Alba roses
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Centifolia roses
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Damask roses
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Species Roses

• Wild
• Wild hybrids
• Rugosas

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Buying roses

• Bareroot
• Potted

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Planting roses
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Planting roses
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Rose maintenance

• Fertilization
• Once per month during growing season

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Rose maintenance

• Sanitation
• To limit disease
• Remove leaf litter, pruning waste
• Do not compost!
• Sanitize pruners
• 10 clorox, 3-5 minutes (but corrosive over time)
• Rubbing alcohol

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Pruning
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Pruning

• Deadheading

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Yearly pruning

• Prune when dormant (between leaf fall and spring
  bud break not in winter)
• Remove dead/dying canes
• Remove pencil-thin canes
• Tear off suckers on grafted roses

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Rose insect pests

• Japanese beetles
• Spider mites
• Thrips
• Aphids

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Rose pests- japanese beetles
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Japanese beetle control
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Japanese beetle grub control
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Rose pests - aphids
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Rose pests - thrips
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Rose diseases

• Black spot
• Powdery mildew
• Botrytis blight (gray mold)

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Blackspot- a fungal disease
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Viral disorders

• Rose yellow mosaic (RYMV)
• Rose (common) mosaic (RMV)

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Disease management

• Good sanitation (planting bed, tools)
• Fungicides
• Daconil, thiomyl (systemic), baking soda

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Plant disease resistant cultivars
120 rose cultivars, breeding lines, and species
were planted in field trials at two sites
(College Station and Overton with Dr. Brent
Pemberton) in Texas in 1993 and 1994 to evaluate
their resistance to the blackspot fungus. The
plants were set on 3 foot centers with 4
replications in a randomized block design. Rating
were done 3 to 4 times per year for percent of
the leaflets with blackspot and leaf defoliation
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Easy going
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Pest control
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Biological pest control

• Wheel bugs

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Biological control

• link

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Propagating roses

• Seed propagation
• Requires 3-4 weeks stratification
• Hardwood cuttings
• Semi-ripe cuttings
• Bud grafting
• Layering

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Hardwood cuttings

• 3 months old

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Rose Information

• American Rose Society