Floribunda (Beetrose)Rosen-Tantau (Hans Jürgen Evers), 2013Bicolour

Sirius

TAN05415; apricot-pink buds open into brilliant white flowers: a 'two-tone' drift; an ADR-rose, and a repeat prize-winner at international competitions.

ADR 2013 · since 2017 also known as “Martin Luther Rose”

Variety profile Gardeners' photos

Variety profile

Flowering

Repeat, in flushes

Repeat-flowering nonstop, from June to October, in flushes; self-cleaning. Months are approximate, for the climate of Ukraine.

Awards

ADR 2013

Gold at The Hague and Glasgow 2016 · best floribunda at Hradec Králové 2015 · Warsaw 2021

Winter hardiness

−20 °C

South and centre of Ukraine; in the north, with winter protection. South and central Ukraine · in the north with winter cover.

Compare reference temperatures

Plant size

60–80 × 80 cm

Habit: Upright, bushy, compact
Dimensions: 60–80 cm tall × around 80 cm wide (taller in favourable conditions)
Support: Not needed; a self-supporting border bush
Shoots: Sturdy, straight
Branching: Dense, branched

Flower

6–8 cm

Bud shape: Light pink with an apricot and yellow undertone
Open flower: Flat, cupped, semi-double; diameter 6–8 cm
Centre: Yellowish white, with visible yellow-orange stamens
Fullness: Semi-double to full (17–25 petals)
Flower carriage: In dense sprays (large clusters); many-flowered

Fragrance

Light; delicate, soft

Disease resistance

4 out of 5

Black spotresistantPowdery mildewresistant

High, ADR-level: black spot 4/5, powdery mildew 4/5.

Sun

Sun / partial shade

Self-cleaning: sheds its spent flowers by itself.

Thorns

Moderate

thornlessfewmoderatemanyvery many

Moderate thorniness (there are few exact data for this variety).

Foliage

Healthy, glossy, rich green, dense.

All characteristics in a table

Group: Floribunda (Beetrose)
Breeder: Rosen-Tantau (Hans Jürgen Evers), Germany, 2013
Bud shape: Light pink with an apricot and yellow undertone
Open flower: Flat, cupped, semi-double; diameter 6–8 cm
Centre: Yellowish white, with visible yellow-orange stamens
Colour: White-apricot blend: young flowers are warm apricot-pink, open flowers are brilliant white; a bush carries warm and white flowers at the same time (a 'two-tone' effect)
Fullness: Semi-double to full (17–25 petals)
Flower carriage: In dense sprays (large clusters); many-flowered
Flowering: Repeat-flowering nonstop, from June to October, in flushes; self-cleaning
Fragrance: Light: delicate and soft
Hips: Due to self-cleaning, it almost never sets hips
Habit: Upright, bushy, compact
Branching: Dense, branched
Shoots: Sturdy, straight
Thorns: Moderate thorniness (there are few exact data for this variety).
Dimensions: 60–80 cm tall × around 80 cm wide (taller in favourable conditions)
Support: Not needed; a self-supporting border bush
Foliage: Healthy, glossy, rich green, dense
Resistance: High, ADR-level: black spot 4/5, powdery mildew 4/5
Variations of the variety: Since 2017 the same variety has been sold as 'Martin Luther Rose' (for the 500th anniversary of the Reformation): this is a rebranding, not a sport

Colour scheme

White-apricot blend: young flowers are warm apricot-pink, open flowers are brilliant white; a bush carries warm and white flowers at the same time (a 'two-tone' effect)

Rose neighbours

Winchester Cathedralpure white

Claire Austincreamy white

Desdemonawhite with pink

Munstead Wooddark raspberry · contrast

Perennials to plant nearby

Catmint (Nepeta)blue

Sage 'Caradonna'purple

Lavender 'Munstead'lavender

Baby's breath (Gypsophila)white mist

Neighbouring roses

White and cream varieties keep the same clean, fresh palette around Sirius; warm apricot buds echo the “warm” neighbours.

Winchester Cathedral Claire Austin Desdemona Munstead Wood

Perennial companions

Blue, lavender and white plants set off the fresh white-and-apricot palette:

catmint (Nepeta)sage 'Caradonna'lavender 'Munstead'baby's breath (Gypsophila)

Contrasting accents

Blue spikes and a sheer “mist” add depth to the light palette:

DelphiniumNepeta Six Hills GiantGypsophila

More about the variety

Hips: Due to self-cleaning, it almost never sets hips
Variations of the variety: Since 2017 the same variety has been sold as 'Martin Luther Rose' (for the 500th anniversary of the Reformation): this is a rebranding, not a sport

How to grow

Where to plant. In a bed, a border, a white flower garden, a low hedge, or containers; the 'two-tone' effect of warm buds and white flowers looks good in mass plantings.

Climate. South and centre of Ukraine, without protection; in the north, with winter protection (USDA zone ~6).

Care. Minimal, an ADR-variety and healthy; full sun or light partial shade, fertile soil; self-cleaning, so removing spent flowers is not essential.

About the name

Name. Sirius, the brightest star in the night sky (α Canis Majoris, the 'Dog Star'); the brilliant whiteness of the fully open flower echoes that bright white star.

Breeding. Bred by Hans-Jürgen Evers for Rosen-Tantau (Germany) in 2005, on sale since 2013. Patent code: TAN05415. Parent forms not published.

Significance. A German ADR-rose of 2013 and a repeat prize-winner at international competitions (gold at The Hague and Glasgow 2016, best floribunda at Hradec Králové 2015, and others). From 2017 the same variety has been sold under the name 'Martin Luther Rose', for the 500th anniversary of the Reformation, referring to Martin Luther's heraldic white rose.

Frequently asked questions about Sirius

Does Sirius need winter protection?

The cultivar’s reference temperature is −20 °C. Overwintering depends on the conditions. South and centre of Ukraine; in the north, with winter protection.

How many times a season does Sirius flower?

Repeat-flowering nonstop, from June to October, in flushes; self-cleaning.

How big does Sirius grow?

60–80 cm tall, about 80 cm wide.

Which diseases affect Sirius?

Overall resistance: 4 out of 5. High, ADR-level: black spot 4/5, powdery mildew 4/5.

How much sun does Sirius need?

Sun / partial shade; self-cleaning: sheds its spent flowers by itself.

What does Sirius smell like?

Light: delicate and soft.