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Denomination: 'Agrotwo'
Botanical Name: Ageratum houstonianum
Applicant/Holder: Syngenta Seeds B.V.
P.O. Box 2
1600 AA
Breeder: Monica Sanders, Syngenta Seeds B.V., Enkhuizen, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-317-7511
Application Date: 2006-11-09
Application Number: 06-5640
Date Withdrawn: 2008-08-25

Variety Description

Variety used for comparison: 'Agrosamtis' (Artist Rose)

Summary: 'Agrotwo' differs from 'Agrosamtis' mainly in plant height and floret colour. The plants of 'Agrotwo' are taller than those of 'Agrosamtis'. The unopened disc florets of 'Agrotwo' is purple while those of 'Agrosamtis' is brown purple. After dehiscence, the disc florets of 'Agrotwo' is violet and white towards the tips while those of 'Agrosamtis' is blue pink.


PLANT: annual, upright-bushy growth habit, medium branching
STEM: light green, medium anthocyanin colouration at nodes, strong pubescence, medium thickness

LEAF: simple, broad ovate shape, acute apex with mucronate tip, cordate base, crenate margins, absent to medium blistering, medium pubescence on upper side, medium pubescence on lower side veins only, medium green on upper side, no variegation, petiole present

FLOWER: inflorescence, absent or very weak anthocyanin on pedicel
DISC FLORET: purple when florets unopened, violet and white towards the tips and aging to white when florets opened

Origin & Breeding History: 'Agrotwo' was developed by the breeder M. Sanders, an employee of Syngenta Seeds B.V. in Enkhuizen, The Netherlands. The cross was made in October 2001 between the female parent identified as W0074-1 and the male parent variety 'Agrosamtis'. The variety 'Agrotwo' was selected from the resultant progeny as a single plant in August 2002 based on criteria for plant habit, vigor, flower size and colour, and good branching characteristics. Asexual reproduction by cuttings was first conducted in August 2002 in Enkhuizen, The Netherlands.

Tests & Trials: PBR trials were conducted in a polyhouse during the spring of 2007 in St. Thomas, Ontario. Trials included 15 plants of the candidate and reference variety. Rooted cuttings were transplanted into 15 cm pots on May 10, 2007. Observations and measurements were taken from 10 plants of each variety on June 25, 2007. All colour measurements were made using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Agrotwo' with reference variety 'Agrosamtis'

Plant height (cm)

  'Agrotwo' 'Agrosamtis'
mean 22.2 16.1
std. deviation 2.63 1.79

Colour of disc bud (RHS)

  'Agrotwo' 'Agrosamtis'
unopened disc floret 70B 186B

Colour of disc floret (RHS)

  'Agrotwo' 'Agrosamtis'
main colour 75B and N155B toward the tips 186D

Click on image for larger view
Ageratum: 'Agrotwo' (left) with reference variety 'Agrosamtis' (right)

Click on image for larger view
Ageratum: 'Agrotwo' (left) with reference variety 'Agrosamtis' (right)

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