Hybrid Tea rose

02-052-1
02-052-2

Blue Monday®

Hybrid tea rose

TANnacht – Mathias Tantau Jr.

Delicate, cool-toned lavender base colour with a silvery tint. - hybrid tea rose - medium strength, well scented rose - sweet, fruity aroma

– Unique lavender‑purple blooms with silvery sheen.
– Strongly remontant, flowers generously all season.
– Upright, elegant habit for beds and specimens.
ADR award and Certificate of Merit holder.
– Healthy foliage with very good disease resistance.
Special feature: Medium, sweet‑fruity fragrance ideal for cutting and indoor enjoyment.
Water-wise – Neat composition
Blue Monday®
vivianaROSE® ORIGINAL 2-litre own-root potted rose
24,80 £
Unfortunately, we are currently unable to ship to the United Kingdom; we only deliver to countries within the European Union. For more information, please contact us!
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BLUE MONDAY® – lavender purple tea-hybrid rose - Tantau

Let BLUE MONDAY® bring a wash of cool, lavender romance to your coastal garden, combining elegance with true garden endurance in a compact, upright hybrid tea that suits family plots and breezy verandas alike. Its refined, high-centred blooms make it ideal for relaxed “girly” gatherings, offering reliably repeat-flowering colour for vases and beds from early summer onwards, even where light salt-laden winds and changeable showers demand secure rooting and steady anchoring. Planted as a pharmaROSA® ORIGINAL own-root rose, it builds quietly from root strength in the first season, gathering above-ground vigour in the second, and reaching its full ornamental impact by the third year, rewarding minimal care with long-term reliability in small and medium UK gardens.


Usage options

Target areaReasoning
Small coastal front garden bed The compact, upright habit keeps BLUE MONDAY® neatly within typical Cornish and Devon front plots, giving structure without overwhelming narrow beds beside paths or drives. Its easy-care nature and own-root longevity appeal to the occasional gardener and the busy beginner.
Coastal veranda container (40–60 litres) In a generously sized 40–60 litre container, this hybrid tea offers elegant, high-centred blooms at a comfortable viewing height, while its strong own-root system gradually secures the plant against wind and variable moisture. Ideal for the veranda rose-lover.
Cut-flower corner in a family garden Blue Monday® was bred as a tea-hybrid cut rose, so its long, straight stems and classic form make it perfect for a small cutting patch, providing repeat waves of fragrant, lavender-purple blooms for indoor arrangements. A pleasure for the home bouquet-maker.
Low-maintenance mixed border with grasses Its moderate height and neat, upright structure sit beautifully among sea-themed grasses such as Festuca and Carex, creating a calm, textural foil for the cool-toned flowers, while the rose’s good disease resistance keeps maintenance predictable for the casual planter.
Wind-exposed yet sheltered-by-fence bed Placed by a fence or low wall, the plant copes well with typical coastal gusts while benefiting from some shelter, combining deep rooting and upright growth with weather-tolerant foliage that handles blustery showers and light salt spray, supporting the seaside homeowner.
Feature specimen near a seating area As a single specimen at the recommended wider spacing, its glossy dark foliage and pale lavender blooms become a calm focal point beside a bench or tea table, offering an easy-care, fragrant highlight that matures steadily for the garden relaxation-seeker.
Informal lavender and sea-kale strip Partnered with sea kale, Lavandula and blue sedges, BLUE MONDAY® extends the flowering season with refined, remontant blooms that bridge gaps in colour, while its reliable framework adds quiet order to loose planting schemes, supporting the coastal-style enthusiast.
Small urban back garden with clay soil In heavier UK clays improved with grit and compost, its own-root system settles progressively, giving a stable, long-lived plant whose moderate water needs are easy to manage, offering structure and colour without fuss for the time-pressed city gardener.

Styling ideas

  • Sea-Breeze Feature – Position BLUE MONDAY® as a single specimen near a bistro set on a sheltered veranda, where its lilac-blue blooms echo sea and sky – for the contemplative tea-drinker.
  • Shingle Ribbon – Thread several plants through a shingle bed with sea kale and blue sedges, letting the cool-toned flowers punctuate the silvery foliage – for lovers of naturalistic coastal schemes.
  • Lilac Cut-Flower Strip – Create a narrow border by a sunny fence, spaced for easy access, to harvest long-stemmed blooms all summer – for home florists who like simple, reliable cutting rows.
  • Grassy Calm – Weave it into a drift of Festuca and Crocosmia, using its upright form as a quiet anchor amongst looser textures and warm accents – for gardeners seeking low-fuss sophistication.
  • Veranda Duo – Plant one rose per 40–60 litre pot, paired with trailing thyme or low lavender, giving a long-lived, fragrant welcome by steps or doors – for compact-space coastal veranda owners.

Technical cultivar profile
ParameterData
Name and registration Hybrid tea rose; registered as TANnacht, marketed as BLUE MONDAY® and also known as Blue Moon in exhibitions; premium gold quality, authenticated for vivianarose.co.uk customers.
Origin and breeding Bred by Mathias Tantau Jr. (Rosen Tantau, Germany) from ‘Sterling Silver’ seedling × unknown seedling; introduced and registered in 1964, with NIRP International as initial distributor.
Awards and recognition Holds the ADR award from 1964, signalling robust garden performance and dependable health in trial conditions, plus a National Rose Society Certificate of Merit the same year for floral quality.
Growth and structural characteristics Upright, moderately thorny shrub reaching about 85–115 cm in height and 75–105 cm spread; moderately dense, glossy dark green foliage provides a tidy, architectural presence in beds.
Flower morphology High-centred, pointed, double blooms with 26–39 petals, classic cut-flower profile on mostly solitary stems; medium-sized flowers, strongly remontant with a generous, reliable second flush.
Colour data and phenology Lavender-purple, cool-toned blooms with a silvery sheen; colour lightens in strong sun but holds better in cooler weather; buds open from crimson-purple through pale lilac to gentle lilac-blue.
Fragrance and aroma Medium-strength fragrance combining sweet and fruity notes; well-scented for close seating areas and cutting, yet not overpowering, adding a refined perfume to small family gardens.
Hip characteristics Due to its very double flowers, hips are sparse; when formed they are small, globular, 12–18 mm across, with warm orange-red colouring, offering modest late-season ornamental interest.
Resistance and winter hardiness Rated resistant to powdery mildew, black spot and rust; hardy to about −21 to −18 °C (RHS H7, Swedish zone 3, USDA 6b), with moderate heat and short-term drought tolerance if watered.
Horticultural recommendations Best in full sun with improved drainage on heavier soils; plant 55–100 cm apart depending on use; deadhead for neatness; regular watering in hot spells keeps repeat flowering consistent.

BLUE MONDAY® offers refined lavender blooms, reliable repeat flowering and a compact, long-lived own-root structure that settles in steadily, making it a thoughtful choice for relaxed coastal and family gardens.

Detailed product attributes

Product Identification Data

Product Name: BLUE MONDAY® – lavender purple tea-hybrid rose - Tantau
Product Type: vivianaROSE® ORIGINAL - 2-litre own-root potted rose
Cultivar Authenticity: Verified:29.03.2025
Cultivar Quality Rating: premium gold
Item Number: [456] 02-052 (14.02.2026) vivianarose.co.uk

Name and Registration

Meaning of Cultivar Name: The term "Blue Monday" refers to the characteristic blue, melancholic mood of English Mondays and also alludes to the lavender-blue–purple tone of the flower.
Cultivar Synonym: Blå Måndag; Blue Moon; Mainzer Fastnacht; Mainzer Rad; Navo-Rose; Sissi®; Sissy
Original Trade Name: Mainzer Fastnacht
Current Trade Name: Blue Monday® Hybrid tea rose TANnacht
Rose Group: Hybrid Tea
Commercial Type: hybrid tea rose
Commercial Group: Hybrid tea rose
Exhibition Category: cut flower; exhibition tea hybrid
Collection: Hybrid tea rose

Origin and Breeding

Initial Distributor: NIRP International (France)
Breeder: Mathias Tantau Jr.
Breeding Company / Institution: Rosen Tantau (Uetersen, Germany)
Breeding Year: Germany, 1964
Parentage: 'Sterling Silver' seedling × unknown seedling

Awards and Honours

Competition and Show Awards: National Rose Society Certificate of Merit (1964)

Growth and Structural Characteristics

Height: 2.8-3.8ft (85-115 cm)
Spread: 2.5-3.4ft (75-105 cm)
Growth Habit: upright
Foliage: The variety has moderately dense foliage. Its leaves have a glossy surface and a dark green hue.
Prickliness: moderately thorny
Self-Cleaning Description: Most of the spent blooms remain on the plant and require deadheading.
Self-Cleaning Intensity: self-cleaning weak

Flower Morphology

Petal Count: 26-39
Flower Fullness: double flowered
Flower Shape: high-centred, pointed bud (cut-flower type)
Flower Size: M (1,5-2,75 in)
Inflorescence Type: solitary
Colour Code: ARS code: M RHS code: 75A (outer), 75C (inner)
Repeat Flowering: It is strongly remontant and produces an abundant second flush.

Colour Data and Phenology

Colour: lavender-purple
Flower Colour Description: Delicate, cool-toned lavender base colour with a silvery tint.
Closed Bud: Deep crimson-purple with a slightly greyish sheen.
Newly Opened Flower: Pure lavender blue, with a silvery coating on the outer petals.
Full Bloom: Gentle lilac-blue with a silvery tone that fades towards the petal edges.
Before Fading: Pale pink‑lilac hue with a greying margin.
Colour Fading Description: In strong sunlight it may lighten; in cool weather the colour is more long-lasting.

Fragrance and Aroma

Fragrance Strength: medium strength, well scented rose
Fragrance Character: sweet, fruity aroma
Pollinator Attraction: Its very double flower form and the reduced accessibility of the stamens make it poorly attractive to pollinators.
Pollinator-Friendly Rating: Its double flowers make it less attractive to pollinators; primarily an ornamental variety.

Hip Characteristics

Hip Shape: spherical
Hip Colour: orange-red
Hip Comment: Because of its double flowering, hip formation is expected to be scarce; occasionally produced, 12–18 mm in diameter, globular, orange-red hips.

Resistance and Hardiness

Hardiness (°C): -21–-18 °C
Heat and Drought Tolerance Description: According to the descriptions, it tolerates moderate drought only for a short period and requires regular watering in hot weather.
Disease Resistance: resistant
  • powdery mildew – resistant
  • black spot – resistant
  • rust – resistant

Horticultural Recommendations

Recommended Planting Distance: for mass planting 65 cm, for hedging 55 cm, as a specimen 100 cm
Planting Density: in square planting 2,5 plants/m², in hexagonal arrangement 2,9 plants/m²
Partial Shade Tolerance: Best in full sun
Maintenance Requirement: Maintenance requirement low; good disease resistance, generally requires little intervention.
Primary Uses: flowerbed, cut flower, specimen

Comments

Strengths: Water-wise – Neat composition
Companion Plants: Carex flacca 'Blue Zinger' - Glaucous sedge Crocosmia sp - Montbretia Liatris spicata 'Alba' - Blazing star
Comment: -
BLUE MONDAY® – lavender purple tea-hybrid rose - Tantau
Delicate, cool-toned lavender base colour with a silvery tint. - hybrid tea rose - medium strength, well scented rose - sweet, fruity aroma
Online rose purchase - hybrid tea rose - Blue Monday® - lavender-purple - (2.8-3.8ft (85-115 cm))
Inflorescence: solitary Height: 2.8-3.8ft (85-115 cm) Flower shape: high-centred, pointed bud (cut-flower type) Winter hardiness: 6b lavender-purple - NIRP International (France) hybrid tea rose - Flower size: M (1,5-2,75 in) Flower size: M (1,5-2,75 in) - Height: 2.8-3.8ft (85-115 cm) Height: 2.8-3.8ft (85-115 cm) - Flower fullness: double flowered Blue Monday® - Roses in the garden | vivianaROSE® Original - premium gold Mathias Tantau Jr.

We showcase the external appearance of the roses available for online purchase from our webshop.


Which product type is right for you?


Information

In what condition do we send the rose from our online webshop?

Let us ask ourselves the question: What do I want to use the rose for?
Flower? - Location? - Screening? - Fragrance? - Height? - Breeder? - Rose hips?

Rose purchasing information
Payment methods - Delivery costs - Delivery - Complaints handling

Care guide

Our product is a rose grown with PharmaRosa®’s unique cultivation technology!

2 litre, own-root, potted rose.
With seasonal shoots appropriate to the time of year.
With a well-developed root system that permeates the growing medium.
Quality compliant with E.N.A. (European Nurserystock Association) requirements.
Supplied in unique, damage-preventing packaging.
Can be planted at any frost-free time.
True-to-variety rosebush, with unique identifier.

The own-root, potted PharmaRosa® rose is a well-rooted plant that guarantees reliable establishment for you, so it can be planted at any time of year during frost-free periods.


Crop: several varieties and several stages of development in one short crop section.
Shoot system: intense growth of fresh basal shoots on a young plant.
Root system: demonstration of the vigorous root system permeating the growing medium, with the pot removed.
Balance: mature plant with a root system and shoot system that are in harmony.

Information about the videos
This video series is not a “seasonal showcase”, but a way to make the essence of PharmaRosa®’s own-root production tangible: how the plant is built, what the root system looks like and how the shoot system renews itself. The footage was therefore taken at different times and of plants at various stages of development, so mixed levels of foliage and differing stages of growth may appear. These clips are not a ‘sample’ of the batch delivered to you, but an illustration of how the technology works. The current condition of the rose you are purchasing – typical for the given time of year and what you can realistically expect to receive in your parcel – is shown at the top of the product page.

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Product types

Pages for private customers
Garden roses for the family garden, with minimal care  → ORIGINAL®
Premium garden roses – instant impact, a truly showpiece garden  → EXTRA®
Pages for professionals and private customers
Roses for public spaces – large areas, sustainable maintenance  → NATURAL®
Roses for projects – hedge and row planting, fast implementation  → RAPID®
For professional partners only
Production – propagation material for garden roses, wholesale  → NEONATAL®

Company details

PharmaRosa Ltd.
Company registration number: 01-09-717479
VAT number: 13075314-2-43
Plant health registration no.: HU130721
Bank account (IBAN):
HU85117631891388688400000000
BIC (SWIFT): OTPVHUHB
Bank name: OTP Bank Nyrt.