Rose Baronesse

'Baronesse' is a relatively obscure but historically interesting Hybrid Tea rose from Rosen Tantau, commercially released in 1989. It combines classic, orange to orange-red fragrant flowers with upright plant and repeat-flowering character traditionally expected of late twentieth-century Hybrid Teas. It belongs to a period when Tantau was refining large-flowered roses for both garden display and the increasingly important cut-flower market.

DESCRIPTION OF THE VARIETY

The historical 'Baronesse' discussed here is the Tantau cultivar associated with the denomination 'TANessenor', a rose protected in Germany at the end of the 1980s and recorded in horticultural collections as belonging to the Hybrid Tea class. Because the name 'Baronesse' was later reused by Tantau for unrelated roses, correct identification is especially important for collectors and rose historians. Properly understood, the original 'Baronesse' is a warm-coloured Hybrid Tea rather than the densely quartered magenta-pink Floribunda or premium cutting velvety red Hybrid Tea under code ‘Tan13029’, which are currently sold under the same name.

For the modern collector, 'Baronesse' is consequently of interest as a preservation cultivar. Its value lies partly in representing Tantau breeding immediately before and during the expansion of the international cut-rose industry, and partly in the nomenclatural puzzle created by later reuse of the same trade name. Any plant purchased today merely as “Baronesse” should therefore be checked carefully against colour, class, date and breeder denomination before being assumed to represent 'TANessenor'.

FLOWERING

Rose 'Baronesse' is a repeat-flowering Hybrid Tea rose, blooming in successive flushes through summer until frosts. Established plants normally build flowering shoots after spring pruning, give a principal early-summer flush, pause while new stems develop, and then repeat through later summer and into autumn where weather permits.

In a temperate continental garden, the first flush can be expected after new spring growth has matured sufficiently to initiate flower buds. Removal of spent blooms, together with adequate moisture and nutrition, encourages the next generation of flowering shoots. In cooler areas, autumn flowering may continue until the shortening season and frost bring growth to an end; in hot climates the plant may slow during extreme heat and resume more strongly once temperatures moderate.

Flower bud:

There are no detailed measurements and characteristics for the bud of Hybrid Tea rose 'Baronesse'. The developing flower buds have elongated to ovoid or pointed bud shape, opening progressively into a structured double bloom. The developing colour of the petals is deeper and more concentrated while the petals remain enclosed, with warm orange-red shade becoming clearer as the outer petals separate.

The calyx consists of five medium green sepals surrounding the unopened corolla; the sepals have lanceolate shape with some light foliaceous appendages, and eventually spread or reflex as the flower opens.

Bloom:

The flowers of the Hybrid Tea rose 'Baronesse' are large, have high-centered shape, orange to orange-red in colour and are fragrant. They flowers are double, and appear mostly singly on strong flowering steam, although few blooms may appear together on strongest flowering branches. This makes 'Baronesse' suitable in principle both for close viewing in a garden and for cutting, although the surviving records do not establish a specific commercial vase-life qualities.

PLANT

Rose variety 'Baronesse' is classified as a Hybrid Tea. The plants of this rose form upright and slightly outwardly medium sized plants, that when mature and well-established reach approximately 80 - 100 cm (2.6 - 3.3 ft) in height and a spread around 80 cm (2.6 ft). Climate and rootstock can alter these considerably: a strong established specimen in rich soil and a long growing season may exceed catalogue measurements, while a plant repeatedly cut back by winter damage will remain lower.

In the garden a position with good light and air movement is preferable. At least six hours of direct sun is desirable in temperate climates, although protection from the most severe afternoon heat can improve flower quality in very hot regions. A fertile, humus-rich but well-drained loam with a slightly acidic to near-neutral reaction is ideal. Constant waterlogging is much more damaging than brief surface dryness because rose roots require both moisture and oxygen.

Pruning should follow conventional Hybrid Tea practice. In climates with cold winters, the principal structural pruning is best delayed until severe frost has passed and buds begin to swell. Dead, damaged and crossing wood should be removed first, after which the strongest shoots may be shortened to outward-facing buds to maintain an open framework. Hard pruning produces fewer but stronger shoots and potentially larger individual blooms; more moderate pruning usually produces a fuller garden plant with more flowering points. Because an old cultivar may be difficult to replace, unnecessarily severe removal of a healthy established framework should be avoided.

Foliage:

There is a normal quantity of the foliage on the plants of this rose. The foliage is generally typical for Hybrid Tea rose: deciduous, pinnately compound leaves arranged alternately on the shoots, with a reasonably substantial texture supporting an actively repeat-flowering plant. The leaves commonly consist of five leaflets on flowering shoots, with variations from three to seven also possible, including the terminal leaflet. The terminal leaflet is typically larger than the lateral pairs. Leaflets are usually ovate to elliptic with a pointed apex and serrated margins, carried along a petiole and rachis that may bear small stipules, glands or prickles.

Wood:

The plant is medium-sized shrub and should develop the upright to somewhat outward-growing cane structure typical of Hybrid Tea roses. New basal shoots arising near the crown are especially valuable because they eventually replace aging flowering wood. Vigorous young stems should be preserved unless badly positioned, while old, weak or repeatedly unproductive canes can be removed gradually during renewal pruning.

Prickles:

No reliable source was found describing the cultivar as either exceptionally thornless or exceptionally heavily armed. It should consequently be handled as a normally prickled Hybrid Tea.

Disease resistance and stress tolerance:

There is no convincing evidence that the Hybrid Tea rose 'Baronesse' underwent modern no-spray disease trials such as the German ADR programme, nor has a standardized cultivar-specific resistance score for black spot or powdery mildew been confirmed. It is consequently prudent to manage this rose as an older Hybrid Tea of ordinary rather than exceptional disease resistance. Black spot, caused principally by species within the Diplocarpon rosae complex, will likely be the most important disease issue in humid climates. Good spacing, removal of heavily infected fallen foliage, irrigation directed toward the soil rather than repeatedly wetting leaves, and preservation of an open plant structure can reduce disease pressure. Where black spot is chronically severe, integrated disease management may be necessary. Powdery mildew may appear during conditions combining dry roots, warm days and cool or humid nights. Consistent watering and avoidance of excessive soft nitrogen-rich growth are useful cultural measures. Rust risk is strongly regional and this rose has no specific resistance to this issue.

In terms of cold hardiness it is placed in typical zoning range for the old Hybrid Tea and is recommended for growing in climates similar to USDA Zone 6 and warmer, corresponding to average annual extreme minimum temperatures of approximately −23.3 to −17.8 °C (−10 to 0 °F). In continental Zone 6 conditions, protective culture is sensible. The graft union can be planted several centimetres below finished soil level where local practice permits, and the crown can be earthed or mulched after the ground begins to cool in late autumn. Exposed shoots may die back during severe winters, but protection of the crown and lower framework gives the plant a better chance of renewal.

'Baronesse' is the German form of “baroness”, a feminine title of nobility. The word entered German usage through French and has long carried associations of aristocratic elegance, refinement and social distinction, qualities readily adapted to rose marketing. Such aristocratic naming has extensive precedent in rose culture, where titles including Baron, Baroness, Comtesse, Duchesse and Princesse have been employed for cultivars since the nineteenth century. However, no explanations behind the naming from Tantau was ever published.

The later reuse of 'Baronesse' naming illustrates a wider problem in rose nomenclature. Trade names may be re-employed after older cultivars disappear from mainstream commerce, while breeder denominations remain the more reliable identifiers. For proper reference 'Baronesse' ('TANessenor') is consequently far more informative than the word 'Baronesse' alone, since this naming was used by Rosen Tantau for later red cutting Hybrid Tea rose 'Baronesse' ('Tan13029') and for magenta-pink Nostalgie Floribunda rose 'Baronesse' ('Tan97094edV') in 2009.

No authenticated major rose-trial award, ADR designation, RHS award, All-America Rose Selections honour, Australian National Rose Trial award, or comparable competition distinction has been confirmed for the historical Hybrid Tea 'Baronesse' ('TANessenor').

ORIGIN OF THE VARIETY

The historical variety 'TANessenor' / 'Baronesse' was bred within the breeding program of Rosen Tantau with Hans Jürgen Evers as the head of the company and its breeding. German plant-breeders’ rights records show an application dated 6 October 1988 and registration on 8 December 1989. The commercial name 'Baronesse' was also being protected internationally by Rosen Tantau in 1989. The precise parentage has not been officially published, the seed parent or the pollen parent remain unknown.

BACKGROUND OF THE VARIETY

By the late twentieth century, Rosen Tantau had become an internationally important source not only of garden roses but also of roses for professional cut-flower production. Breeding increasingly had to reconcile flower beauty with stem quality, productivity, transport performance, vase life and adaptability to greenhouse production. 'Baronesse' belongs historically to this transitional environment. Its warm orange-red colour and fragrance represent ornamental attributes valued by gardeners, while its Hybrid Tea form belonged naturally to a class equally important for cutting.

SUMMARY OF THE VARIETY

'TANessenor' / 'Baronesse' is a late twentieth-century Tantau Hybrid Tea whose warm orange to orange-red flowers, fragrance and moderate upright habit incorporated the following unique combination of characteristics:

  warm orange to orange-red flowers within the Hybrid Tea class tradition;

  fragrant blooms combined with recurrent seasonal flowering;

  moderate garden size of approximately 80–100 cm, suitable for close viewing and cutting.

COMPARISON WITH PARENTS

Precise seed and pollen parent documentation for this cultivar was not published, therefore, a formal parent-by-parent comparison cannot be made reliably.

USDA 6

USDA Zone 6 - hardiness guide