KORpolare

Rose

Variety Description

Varieties used for comparison: 'KORkeesky' (Dark Mandy Kordana) and 'KORpot003' (Apache Kordana)

Summary: 'KORpolare' has larger leaves which are darker green and less glossy than those of 'KORkeesky'. The terminal leaflet in cross-section is flat for 'KORpolare' while it is concave for 'KORpot003'. 'KORpolare' has more petals per flower than 'KORkeesky'. The flowers of 'KORpolare' are larger in diameter with larger, darker red petals than 'KORkeesky'. The profile of the lower part of the flower is convex for 'KORpolare' while it is flat for 'KORkeesky' and concave for 'KORpot003'. Reflexing of the petal margin is moderate for 'KORpolare' while it is strong for 'KORpot003'. The basal spot on the inner side of the petal is white for 'KORpolare' whereas it is medium yellow for 'KORkeesky'. The outer stamens of 'KORpolare' are light yellow whereas those of 'KORkeesky' are medium yellow and those of 'KORpot003' are pink.

Description:

PLANT: miniature type, upright growth habit
YOUNG SHOOT: no anthocyanin colouration
PRICKLES: few, predominantly greenish and reddish

LEAF: medium to large, dark green on upper side, no anthocyanin colouration, weak to medium glossiness on upper side
TERMINAL LEAFLET: absent or very weak undulation of margin, ovate, rounded base, acuminate to acute apex

FLOWERING SHOOT: no flowering laterals, very few flowers
SEPAL: medium extensions
FLOWER BUD: medium ovate in longitudinal section
FLOWER: double type, red colour group, density of petals is dense, round to irregularly rounded shape when viewed from above, profile of upper part is flat, profile of lower part is convex, no fragrance, reflexing of petals one by one is absent
PETAL: transverse elliptic, absent of very weak incisions, moderate reflexing of margin, weak undulation, medium size, one colour on inner side, intensity of colour on inner side is lighter towards apex, main colour of inner side is dark purple red (RHS 53A/60A), basal spot on inner side is small and white, main colour on outer side is purple (RHS 60C)
OUTER STAMEN: predominant colour of filament is light yellow
SEED VESSEL: small to medium size at petal fall
HIP: pitcher shape

Origin & Breeding History: 'KORpolare' originated in 1999 from a traditional hybridization, seed harvest, and planting. During the following spring, the seed germinated and selections were made. All hybridization and selections were conducted in glasshouses located in Klein Offenseth-Sparrieshoop, Germany. 'KORpolare' was selected based on its above average disease resistance, improved flower colour with excellent shelf life, and suitability for propagation by cuttings in pots for subsequent forcing under greehouse conditions, particularly during winter production.

Tests & Trials: The PBR trial for 'KORpolare' was conducted in 2013 at Westbrook Greenhouses Plant #3 in Beamsville, Ontario. The trial consisted of fifteen 10 cm pots for each of the candidate and reference varieties. Each pot contained 4 plants spaced 2 to 3 cm apart. The pots were approximately 1 cm apart. Measured characteristics were taken from 10 plants or parts of plants. All colour determinations were made using the 2001 Royal Horticultural Society (RHS) colour charts.

Comparison tables for 'KORpolare' with reference varieties 'KORkeesky' and 'KORpot003'

Flower diameter (cm)

Number of petals per flower

Petal length (cm)

Petal width (cm)

Main colour of petal (RHS)

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Rose: 'KORpolare' (left) with reference variety 'KORkeesky' (right)

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Rose: 'KORpolare' (right) with reference variety 'KORpot003' (left)

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Rose: 'KORpolare' (centre) with reference varieties 'KORpot003' (left) and 'KORkeesky' (right)