Silt Whit


Denomination: 'Silt Whit'
Trade name: Silhouette White
Botanical Name: Impatiens walleriana
Applicant/Holder: Syngenta Crop Protection AG
Schwarzwaldallee 215
Breeder: Jolanda Krassenburg, Goldsmith Seeds Europe B.V., Andijk, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2007-12-24
Application Number: 07-6087
Grant of Rights Date: 2010-02-18
Certificate Number: 3772
Date rights surrendered: 2014-02-18

Variety Description

Variety used for comparison: 'BFP-7812' (Fiesta White)

Summary: The plants of 'Silt Whit' are shorter than those of 'BFP-7812'. 'Silt Whit' has smaller flowers than 'BFP-7812'. The upper side of the petals of 'Silt Whit' are white while those of 'BFP-7812' are white with light blue violet at the base.


PLANT: very short, narrow to medium width, no anthocyanin colouration on upper third of shoot

LEAF: very short, very narrow, no variegation, medium green on upper side, no anthocyanin colouration on upper side, green only between veins on lower side, no anthocyanin colouration on veins or midrib of lower side
PETIOLE: no anthocyanin colouration on upper side, very short

FLOWER: double, medium to wide, one coloured, white (RHS 155B) on upper and lower side, no eye zone, short pedicel, no anthocyanin colouration on pedicel
SPUR: no anthocyanin colouration, weak degree of curvature

Origin & Breeding History: 'Silt Whit' originated from a hybrid cross conducted by the breeder Jolanda Krassenburg, an employee of Goldsmith Seeds Europe, Andijk, The Netherlands, as part of a planned breeding program in August 2005. The cross was between the female parent 'ID03-825-2' and the male parent 'ID03-953-5'. The resultant seed was sown in November 2005. In December 2005, a single plant was selected by the breeder based on flower colour and plant growth habit.

Tests & Trials: Trials for 'Silt Whit' were conducted in a polyhouse during the summer of 2008 in St. Thomas, Ontario. Trials included 15 plants each of the candidate and reference varieties. Rooted cuttings were transplanted into 15 cm pots on April 25, 2008. Observations and measurements were taken from 10 plants of each variety on June 23, 2008. All colour determinations were made using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Silt Whit' with reference variety 'BFP-7812'

Plant height (cm)

  'Silt Whit' 'BFP-7812'
mean 12.8 17.6
std. deviation 3.70 1.43

Flower diameter (cm)

  'Silt Whit' 'BFP-7812'
mean 4.3 3.4
std. deviation 0.31 0.32

Colour of petal (RHS)

  'Silt Whit' 'BFP-7812'
upper side whiter than 155B whiter than 155B with 69C at base

Click on image for larger view
Silt Whit
Impatiens: 'Silt Whit' (left) with reference variety 'BFP-7812' (right)

Click on image for larger view
Silt Whit
Impatiens: 'Silt Whit' (left) with reference variety 'BFP-7812' (right)

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