Double anatomy
Additional petaloid organs fill the centre to create a rosette rather than a simple funnel.
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Family: Apocynaceae · Pot: 3 L · 19 cm · Height: approx. 60 cm


Mandevilla ‘Sunpa 421’ Sundaville® Double Blush Pink does not merely add a few petals: it transforms the familiar funnel into a broad, tactile, fully layered rosette. Soft blush tones deepen towards the centre above glossy dark foliage. Stable doubleness, upright branching and continuous summer renewal make it genuinely different from an ordinary mandevilla. Every rosette rewards a closer look.
It is a jewel plant for a terrace, entrance or poolside where every flower can be enjoyed close up. The image is tropical and romantic yet the outline remains clean and contemporary—the exact combination that earned it the FleuroStar distinction.
Fleuroselect FleuroStar 2023–2024.
Sundaville® Double Blush Pink is distinguished by double anatomy and two further characters specific to this exact selection.
Additional petaloid organs fill the centre to create a rosette rather than a simple funnel.
A pale exterior warms towards the throat, giving visual depth without a hard contrast.
FleuroStar recognised its immediately legible innovation and strong flowering presentation.
Why you will love it: it is the rare case where real botanical innovation becomes a flower everyone immediately wants to touch and photograph.
Place it in a warm, sunny position beside a permanent trellis or vertical mesh. Train more than one stem over the support so its true climbing habit forms a dense surface of double flowers.
Combine with Dichondra argentea ‘Silver Falls’, Gaura lindheimeri and Pennisetum setaceum ‘Rubrum’ for silver cascade, airy pink and deep purple.
A very bright sunny position after gradual acclimatisation. At the height of a heatwave, morning sun limits scorch and bud drop.
Water deeply as the surface dries and always empty the saucer. Alternating severe drought with saturation causes buds to drop.
Warm-loving and frost tender. Growth slows below roughly 10–12 °C, so move it promptly to a bright protected position.
The white milky sap can irritate skin and eyes. Wear gloves when pruning and prevent ingestion.
A very bright sunny position after gradual acclimatisation. At the height of a heatwave, morning sun limits scorch and bud drop.
Water deeply as the surface dries and always empty the saucer. Alternating severe drought with saturation causes buds to drop.
Use a rich but aerated mix with perlite or pumice and generous drainage. Roots require oxygen even while the plant is using water rapidly.
Feed little and often during active growth with adequate potassium and trace elements. Stop as nights cool and new growth slows.
Pinch lightly after a flowering flush and train at least two flexible stems over the permanent support. Tie them loosely where needed and remove only excessively long or weak growth before overwintering.
Move before the first cold spell to a frost-free place with abundant light and less frequent watering. Check leaf undersides for spider mites.
Once adjusted to the new light level, it activates side shoots and successive flowering tips. Stable temperature and watering in response to surface drying limit bud loss.
The young plant first builds an upright branched frame. As nodes multiply, each tip can carry successive double flowers, producing a narrow flowering column rather than a loose vine.
At maturity it grows as a true climber about 70 cm high and 30–40 cm wide, with several trained stems and double flowers over the support.
Several flexible twining stems climb a permanent support; the mature plant is not a self-supporting round shrub.
The support remains part of the plant in both states; it is never shown as a free-standing round shrub.
Selection ‘Sunpa 421’ is marketed as Sundaville® Double Blush Pink through the MNP/Suntory programme. The series describes it as a true climber of medium vigour, about 70 cm tall, with flowers roughly 75 mm across from spring to autumn.
Its layered blush-pink corolla made it the first truly double Sundaville® and led to Fleuroselect’s FleuroStar 2023–2024 distinction. The award recognised both the novelty of the flower form and its immediate visual impact.
In double flowers, a shift in floral-organ identity produces extra petaloid members instead of ordinary stamens. The additional layers belong to one floral meristem and form a single layered corolla rather than two flowers.
Complex floral morphogenesis may segregate in sexual offspring. Clonal propagation preserves the same meristem programme and therefore the dense double corolla of ‘Sunpa 421’.
Six precise answers for Sundaville® Double Blush Pink, from its present scale to mature behaviour.
The listed approx. 60 cm is its height on arrival. Long-term placement must allow for a mature scale of about 70 cm by 30–40 cm rather than today's young outline.
Use alone in an elegant pot near seating or an entrance, in very bright light with a discreet small support, so the double rosettes are visible close up from every side.
Water deeply as the surface dries and always empty the saucer. Alternating severe drought with saturation causes buds to drop.
Pinch lightly after a flowering flush to increase side branching. Shorten excessively long shoots before overwintering without hard-pruning a stressed plant.
The cultivar was selected for stable doubleness, although natural variation in petaloid-organ number may occur between early and mature flowers.
It is not essential, but gentle removal once they release easily keeps the crown clean. Do not pull the flower stalk forcefully.