Introduction

Solandra maxima (Cup of Gold Vine) is a evergreen climber in the Solanaceae family, reaching 12 metres with golden yellow flowers in spring. Hardy in USDA zones 10-12. Valued for its fragrant flowers.

Solandra maxima, commonly known as Cup of Gold Vine, is a evergreen evergreen climber in the Solanaceae family. The plant reaches 12 metres in height with a spread of approximately 4 metres, climbing by means of twining stems that spiral around supports. The golden yellow flowers appear in spring, providing seasonal colour. The flowers emit a delightful fragrance that carries well in still air, making this an excellent choice near seating areas and pathways. The foliage is dark_green, maintaining its colour year-round as an evergreen. Growth rate is extremely vigorous, capable of adding 2-4 metres per season under ideal conditions. Native to Mexico, this species has become a valued ornamental plant in temperate and subtropical gardens worldwide.

Botanical Description

Classification: Solanaceae > Solandra > maxima. The Solanaceae is the botanical family containing the genus Solandra. This species is native to Mexico and was introduced to European gardens from Mexico. The genus Solandra contains several species, many of which are valued in horticulture for their climbing habit and ornamental qualities.

Climbing Mechanism

Solandra maxima climbs by twining stems that spiral around supports. The growing tips actively rotate in a circular motion (nutation) seeking out vertical supports to wrap around. Once the stem contacts a suitable support, it begins spiraling upward. This mechanism works best with thin vertical supports such as wires, poles, string, or other plant stems. The stems cannot grip flat surfaces or very thick posts. The plant reaches approximately 12 metres under good growing conditions.

Group Climbing Guide — Tropical Vine

Various — tendrils, twining, or scrambling. Most need sturdy warm-wall support. Protect from wind.

Planting Guide

Step 1 — Site Selection: Choose a position in full sun (6+ hours direct sunlight daily) with well-drained soil. Consider the mature size (12m tall × 4m wide) when selecting the site. Step 2 — Support Installation: Install a robust pergola, arbor, or overhead structure before planting. Ensure the support is rated for the mature weight of the plant. Step 3 — Soil Preparation: Dig a hole twice the width and 1.5 times the depth of the rootball. Mix in well-rotted compost and a slow-release fertilizer. Target pH 6.0-7.0. Step 4 — Planting: Plant at the same depth as the container (except clematis, which should be planted deeper). Water thoroughly and firm in gently. Step 5 — Aftercare: Mulch with 5-8 cm of organic matter. Water regularly during the first growing season. Guide initial stems toward the support using soft ties. Protect from slugs and snails in the early stages.

Climate & Hardiness

Spring: Apply a balanced slow-release fertilizer as new growth begins. Mulch around the base with organic matter. Tie in new stems to supports. Check for winter damage and prune out any dead or damaged growth. Summer: Water regularly , especially during dry spells. Feed monthly with a liquid fertilizer during the growing season. Continue training and tying in new growth. Deadhead if applicable. Autumn: Reduce watering and feeding as growth slows. Apply a thick mulch to protect roots from winter cold. Check for any pest or disease issues before winter. Winter: Protect from severe frost with horticultural fleece if temperatures drop below 5°C. Check ties and supports. Plan any structural pruning for late winter.

Overwintering Guide

Most need minimum 5–10°C. Move containers inside. Protect wall-grown with fleece. Accept dieback in borderline areas.

Propagation

Stem cuttings (primary method): Take semi-ripe cuttings in mid to late summer (July-August). Select healthy, current season's growth, cutting just below a leaf node. Cuttings should be 10-15 cm long. Remove lower leaves, dip the cut end in hormone rooting powder, and insert into a well-drained mix of perlite and peat (50:50). Place in a propagator or cover with a clear plastic bag. Bottom heat of 18-21°C improves success rates. Roots typically develop within 4-8 weeks. Success rate: 60-80%. Layering (alternative): In spring, select a low-growing flexible stem. Wound the underside lightly, pin it to the ground with a wire staple, and cover with soil. Keep moist. Roots develop over 6-12 months. Sever from the parent plant and transplant the following season. Success rate: 80-90%.

Pests & Diseases

Common Problems

Group Disease & Pest Reference (Tropical Vine)

• Mealybugs — white waxy clusters in leaf axils; use methylated spirit or biological control
• Scale insects — hard brown bumps on stems; scrape off, treat with neem oil
• Red spider mite — common under glass; increase humidity, introduce predatory mites
• Fungal rots — in cold damp conditions; improve ventilation, reduce watering in cool weather
• Whitefly — in conservatories; use yellow sticky traps, introduce Encarsia wasps

Training & Pruning

Pruning timing: Prune after flowering or in early spring. Formative pruning: In the first 2-3 years, focus on building a strong framework of main stems by selecting well-placed shoots and tying them to the support. Remove weak, crossing, or badly-placed stems. Maintenance pruning: Once established, shorten side shoots after flowering to maintain shape and encourage new flowering wood. Remove any dead or damaged growth promptly. Thin overcrowded stems to maintain good air circulation. Training: Tie in new growth regularly throughout the growing season using soft garden twine or plant clips. Spread stems evenly across the support for the best coverage and flowering display. Check ties annually and replace any that are too tight.

Pruning Guide — Tropical Vine

Prune after flowering to control size. Remove dead wood in spring. Thin congested growth for air circulation.

Support Structures

Best support types for Solandra maxima: Primary recommendation: A robust pergola, arbor, or overhead structure, sized to accommodate the mature height of 12m and spread of 4m. Wire systems: Horizontal galvanized wires at 30-45 cm intervals, tensioned between vine eyes or posts. Ideal for walls and fences. Trellis panels: Choose panels with openings suited to the climbing method — thin supports for tendrils or stems to wrap around. Installation tips: Mount supports at least 5 cm from the wall for air circulation. Use stainless steel or galvanized fittings to prevent rust. Ensure all fixings are rated for the mature weight of the plant, especially in exposed positions.

Support Guide — Tropical Vine

Warm wall with wires, conservatory framework, sturdy trellis. Wind protection essential.

Wildlife Value

Solandra maxima is a valuable pollinator plant, attracting bees, butterflies, and hover flies to the garden. The fragrant flowers are particularly attractive to night-flying moths. Ecosystem services: The climbing habit creates valuable vertical habitat, providing shelter and nesting opportunities for birds and invertebrates. Dense foliage offers roosting sites for birds and overwintering habitat for beneficial insects.

Landscape Design

Walls and fences: Solandra maxima is well-suited to covering walls and fences when provided with suitable support structures. Pergolas and arbors: Excellent choice for pergolas, creating a dramatic overhead canopy. Screening: Creates year-round screening when grown on appropriate support. Effective for disguising unsightly structures, dividing garden rooms, or creating private spaces. Feature plant: Makes a stunning focal point when grown on a prominent support structure. Combine with other climbers for a layered, naturalistic effect.

History & Culture

Solandra maxima has been cultivated in gardens since its introduction from Mexico. Originally from Mexico, it has become valued in horticulture for its fragrant flowers and ornamental qualities. The genus Solandra has contributed significantly to the diversity of climbing plants available to gardeners, with species found across multiple continents and climate zones.

Container Growing

Solandra maxima is not recommended for container growing due to its vigorous root system and large mature size (12m). The plant requires open ground to develop a sufficiently large root system for healthy growth and flowering. If space is limited, consider a more compact cultivar or alternative species better suited to container culture.

Frequently Asked Questions

Seasonal Care Calendar