Everything is Coming Up Roses
LoAyne Voigt
Renville County Extension Agent
Plant Survival Factors
• Temperature zones
• Freeze – thaw cycles
• Snow cover
• Sun scald
• Late spring frosts
• Road salts and pollutants
Hard to Determine Hardiness?
Some people can grow certain kinds
of roses, while others can’t.
Zones are a starting point.
We can also look at what our
limiting factor may be and create a
micro-climate.
Rose Types
• Bush Roses
– Hybrid teas, floribundas, grandifloras
• Miniature and patio roses
• Ramblers and large flower climbers
• Winter hardy shrub roses
– Both old fashioned & modern hybrids
Cold Hardy Roses
• May be that conventional rose bush
that has survived the neglect and
abuse of many gardeners (and non
gardeners) over a number of years,
one that our grandmothers may
have planted or its stock
– Hansa Rose
– Persian Rose
– Harrison’s Yellow Rose
Canadian Bred Roses
• Parkland Series
• Explorer Series
• Artist Series
• These are among the hardiest
hybrids on the market!
Parkland Roses
• Developed at Morden
Research Station.
• Goal was to develop
roses hardy in the
Prairie Provinces.
• Wider range of color
• Many have good
disease resistance
• No climbers – not very
fragrant
Morden Centennial Rose
Explorer Series
• 22 cultivars
• Bred at Ottawa,
Ontario, later Quebec
• Canadian explorers
• Mostly pinks & reds
(a few yellows)
• Don’t bloom
continuously
• Most are semi-double
blooms
Lambert Closse
The Artist Series…
• Independent rose
breeders
• Research Station in
Ottawa closed,
and Morden really
cut back
• Honors famous
Canadian artists
• So far there are
only two released
Emily Carr
Felix Leclerc
Site
Selection
 Well drained with
about 6-8 hours
of sun
 Away from roots
or shady areas
 Site is very critical
for roses success
 If it does not
adapt to location
– move it
Site Preparation
• Good air movement – do not crowd
• Do poorly in high alkaline soils
– Sulfur, manure, peat moss can amend
high alkaline soils
• Like moisture; roots don’t like to be soggy
• Initially mix bone meal or super phosphate
in the soil (nothing additional)
• Dig a nice deep hole, no crimping or
bending of the roots
Watering
• Deep watering –
once a week.
Roses have deep
roots
• 2 gallons/week
• Avoid wetting
foliage as much as
possible
• Make sure plant is
dry by night fall
Fertilizing
General
A Good Schedule
• Organic works great – lots
of compost and manure
• Personally – I don’t use
much commercial, instead
use sheep manure
• Do not over apply the
Nitrogen
• There are special rose
mixtures, basically a 1-2-1
ratio. e.g.: 10-29-10 or 6-12-8
1) First fertilization - early
spring at clean up.
2) Right before first
bloom – early June.
3) Mid- July
4) Stop fertilizing August
1st. Roses need to
harden off for winter.
Purchasing Plants
Bare Root
Container Grown
• Keep roots moist at all
times
• Keep cool and dark
place
• Mix roots with
dirt/mulch
• Before planting cut
back broken or
damaged roots
• These are already
growing
• Always remove the
pot- even if the fiber
type
• Minimize root
disturbance
Deadheading
Cut just above an
outward facing 5leaflet leaf on a
cane strong
enough to support
a new bloom
Stop deadheading
after September 1