Miniature rose plant named ‘KORpot133’

[0001] Latin name of genus and species of plant claimed: Rosa hybrida.

[0002] Variety denomination: ‘KORpot133’.

[0003] The first sale or offer for sale of the new plant variety was January 2025, in the U.S.A. The first sale or offer for sale of the new plant variety was by an inventor or another who obtained the new variety directly or indirectly from an inventor. No plants of the new variety have been sold in this country or anywhere in the world, nor has any disclosure of the new plant been made, more than one year prior the effective filing date of this application, and such sale or disclosure within one year was either derived directly or indirectly from an inventor.

[0004] The new variety of miniature rose plant of the present invention was created by controlled breeding during 2017 in Offenseth-Sparrieshoop, Germany by artificial pollination wherein two parents were crossed which previously had been studied in the hope that they would contribute the desired characteristics. The female parent (i.e., the seed parent) was ‘RUIe057a’ (not patented). The unnamed male parent (i.e., the pollen parent) of the new variety was a product of the cross between ‘RUId155’ (not patented) and ‘Kordaba’ (U.S. Plant Pat. No. 9,116).

[0005] The parentage of the new variety can be summarized as follows:
‘RUIe057a’ x (‘RUId155’ x ‘Kordaba’)

[0006] The seeds resulting from the above pollination were sown and small plants were obtained which were physically and biologically different from each other. Selective study resulted in the identification of a single plant of the new variety.

[0007] The new plant variety has been found to undergo asexual propagation at Klein Offenseth-Sparrieshoop, Germany by a number of routes such as vegetative cuttings. Asexual propagation techniques in Klein Offenseth-Sparrieshoop, Germany, such as vegetative cuttings, have shown that the characteristics of the new plant variety are homogeneous, stable, and strictly transmissible by such asexual propagation from one generation to another. Accordingly, the new plant variety undergoes asexual propagation in a true-to-type manner.

[0008] It was found that the new variety of miniature rose plant of the present invention possesses the following combination of characteristics:

• • [0009] (a) abundantly and substantially continuously forming deep red-colored blossoms,
  • [0010] (b) exhibiting a compact growth habit, and
  • [0011] (c) forming glossy, dark green foliage.

[0012] The new plant variety well meets the needs of the horticultural industry. It can be grown to advantage as distinctive ornamentation in parks, gardens, public areas, and residential landscapes. Accordingly, it is particularly well suited for growing in the landscape.

[0013] The new plant variety can be readily distinguished from its ancestors. More specifically, the new plant variety displays a larger foliage size, a taller growth pattern and a larger flower size compared to the ‘RUIe057a’ variety (i.e., the seed parent). Additionally, the new plant variety displays a deeper red flower color and a taller growth habit compared to the unnamed male parent (‘RUId155’ x ‘Kordaba’) variety (i.e., the pollen parent). Moreover, the new plant variety can be readily distinguished from non-parental related similar varieties. For example, the new plant variety displays larger flowers and a taller growth habit compared to the ‘KORpot003’ variety (U.S. Plant Pat. No. 23,795).

[0014] The new variety has been named the ‘KORpot133’ variety.

[0017] The chart used in the identification of colors is that of The Royal Horticultural Society (The R.H.S. Colour Chart, 2015 edition). The terminology which precedes reference to the chart has been added to indicate the corresponding color in more common terms. The R.H.S. Colour Chart designation used herein represents the closest color observed on the majority of the specified botanical features. The description is based on a five-year-old specimen of the new variety, observed during August 2025, while growing in a seven-gallon container on its own roots in a greenhouse in Cochranville, Pennsylvania.

• [0018] Botanical classification: Rosa hybrida cultivar ‘KORpot133’.
• [0019] Commercial classification: Miniature Rose.
• [0020] Plant:
  • • [0021] Habit.—Compact.
    • [0022] Height.—Approximately 60.0 cm on average from the top of the soil plane.
    • [0023] Width.—Approximately 45.0 cm on average.
• [0024] Branches:
  • • [0025] Stem color.—Old wood: Green Group 143A. — young stems: Yellow-Green Group 144A.
    • [0026] Length.—Main stems: approximately 60.0 cm on average. — secondary stems: approximately 31.0 cm on average.
    • [0027] Diameter.—Main stems: approximately 1.0 cm on average. — secondary stems: approximately 3.0 mm on average.
    • [0028] Texture.—Smooth.
    • [0029] Prickles.—Amount: 6 to 10 prickles per internode with many additional small, hispid-like prickles intermixed. — young prickles: length is approximately 5.0 mm on average; width is approximately 3.0 mm on average at point of attachment; and color is Yellow-Green Group 151A. — old prickles: length is approximately 5.0 mm on average; width is approximately 4.0 mm on average at point of attachment; and color is Greyed-Orange Group 177B.
• [0030] Leaflets:
  • • [0031] Number.—5 and 7.
    • [0032] Shape.—Ovate; apex is acute to acuminate; and base is cuneate.
    • [0033] Arrangement.—Odd-pinnate.
    • [0034] Margin.—Serrate.
    • [0035] Undulation.—Moderate.
    • [0036] Glossiness of upper side.—Glossy.
    • [0037] Texture.—Upper surface: smooth. — under surface: smooth.
    • [0038] Venation pattern.—Reticulate.
    • [0039] Size.—Terminal leaflet: length is approximately 6.3 cm on average; width is approximately 3.6 cm on average. — lower leaflets: length is typically 3.0 cm to 5.0 cm; width is typically 2.0 cm to 3.0 cm. — 5-Leaflet leaf. length is approximately 12.0 cm on average; width is approximately 9.7 cm on average.
• [0040] Foliage:
  • • [0041] Young foliage.—Upper surface color: Green Group 137B with indistinguishable venation. — under surface color: Green Group 137C with indistinguishable venation.
    • [0042] Old foliage.—Upper surface color: Green Group 139A with indistinguishable venation. — under surface color: Green Group 137B with indistinguishable venation.
    • [0043] Petiole.—Texture: upper surface is hispidulous; under surface is smooth, with 1 or 2 prickles between first set of lower leaves and stipules. — length: approximately 1.0 cm on average. — width: approximately 1.0 mm on average. — upper surface color: Green Group 138A, with faint stripe down the center of Greyed-Orange Group 176A. — under surface color: Green Group 143C.
    • [0044] Rachis.—Length: approximately 1.5 cm on average. — width: approximately 1.0 mm on average. — upper surface color: Yellow-Green Group 144A. — under surface color: Yellow-Green Group 144A.
    • [0045] Stipules.—Length: approximately 1.8 cm on average. — width: approximately 7.0 mm on average. — margin: entire to erose. — upper surface color: Green Group 139A. — lower surface color: Green Group 137B.
• [0046] Inflorescence:
  • • [0047] Number of flowers.—About 30 to 40 blooms on average on a plant at once.
    • [0048] Number of blossoms per stem or in a cluster.—Typically between 1 and 5 blooms per stem on average.
    • [0049] Peduncle.—Color: Yellow-Green Group 144A. — diameter: approximately 3.0 mm on average. — length: approximately 3.1 cm on average. — surface texture: hispid, with substantial prickles in addition to the hispid protrusions.
    • [0050] Sepals.—Number: 5. — upper surface color and texture: Green Group 143A, hispid. — under surface color and texture: Green Group 143A, hispid. — size: length is approximately 3.0 cm on average; width is approximately 1.4 cm on average. — margin: entire with extensions on most sepals measuring approximately 4.0 mm in length and 1.0 mm in width on average. — shape: ovate. — apex: acute to aristate. — base: truncate as it joins the receptacle.
    • [0051] Buds.—Shape: ovoid. — size: length is approximately 2.4 cm on average; width is approximately 1.5 cm on average. — color (when opening): Green Group 143B.
    • [0052] Flower.—Form: double, cuplike. — profile: concave as it opens, and then outer petals are convex as the bloom ages and opens further. — diameter: approximately 6.5 cm on average. — height: approximately 2.0 cm on average. — duration: on the plant approximately 10 to 15 days. — petal color when first and fully opened: upper surface is Red Group 53A with a small basal spot of Yellow Group 4D; under surface is Red Group 53A with a small basal spot of Yellow Group 4D. — petal color at end of bloom: upper surface is Red Group N45A with a small basal spot of Yellow Group 4D; under surface is Red Group N45C with a small basal spot of Yellow Group 4D. — petals reflex: one by one: yes.
    • [0053] Fragrance.—No noticeable scent.
    • [0054] Petal.—Number: 45 to 50 on average. — drop: good. — length: approximately 3.0 cm on average. — width: approximately 3.6 cm on average. — overall shape: broadly obovate. — margin: entire with moderate undulation. — apex shape: rounded to slightly reniform. — base shape: cuneate. — texture: upper surface is smooth; under surface is smooth.
    • [0055] Petaloids.—Number: approximately 4 on average. — length: approximately 2.2 cm on average. — width: approximately 1.0 cm on average. — color: upper surface is Red Group N45A with a basal spot of Yellow Group 2C; under surface is Red Group 53B with a basal spot of Yellow Group 2C. — texture: upper surface is smooth; under surface is smooth. — margin: entire with moderate undulation. — shape: obovate. — apex: obovate. — base: truncate.
    • [0056] Stamen.—Number: approximately 90. — anthers: number is approximately 90; color is Brown Group 200A; length is approximately 1.0 mm on average; and shape is oval. — filaments: length is approximately 7.0 mm on average and color is Red Group 42B with Yellow-Orange Group 22A toward the base.
    • [0057] Pistils.—Arrangement: separate and free. — number: approximately 72. — style: length is approximately 5.0 mm on average and color is Yellow-Orange Group 17D. — stigma: diameter is approximately 1.0 mm on average; shape is fan shaped; color is Yellow-Orange Group 17D.
    • [0058] Receptacle.—Diameter: approximately 8.0 mm on average. — depth: approximately 7.0 mm on average. — shape: urn shaped. — color: Green Group 143C. — surface texture: covered in substantial thorns and small prickles.
    • [0059] Pollen.—None observed.
    • [0060] Hips/seed.—None observed.
• [0061] Development:
  • • [0062] Vegetation.—Glossy, dark green, and vigorous.
    • [0063] Blossoming.—Abundant and substantially continuous from spring through frost; typically, in bloom outdoors from May to November in Southeastern Pennsylvania.
    • [0064] Resistance to diseases.—Good resistance to powdery mildew (Podosphaera pannosa).
    • [0065] Hardiness.—Unknown.

[0066] The new ‘KORpot133’ variety has not been observed under all possible environmental conditions to date. Accordingly, it is possible that the phenotypic expression may vary somewhat with changes in light intensity and duration, cultural practices, and other environmental conditions.