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Dahlia ‘Sincerity Rose Bicolour’


Great for wildlife
May - October
60cm x 45cm
Attracts Wildlife
Tender Perennial

Our team loves Dahlia ‘Sincerity Rose Bicolour’ for its exquisite blooms. The petals form a symmetrical pattern, creating a beautifully rounded shape like a perfect floral sphere. The white color, enhanced by a hint of soft cream, adds depth and dimension. This dahlia thrives in sunny spots, making it perfect for beds, borders, or containers. It also attracts bees and butterflies, supporting local wildlife and bringing elegance to any garden.

Additional information

Plant Type
Flowering Period
Flower Colour
Fully Grown Size
Garden Position
RHS Plants For Pollinators
RHS Garden Merit Award
Pot Size
30 Day Returns


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Dahlia 'Sincerity Rose Bicolour' is a stunning addition to any garden, chosen by our nursery team for its captivatingly vibrant blooms. This Dahlia variety features large, double blooms with a striking bicolour pattern – a beautiful blend of creamy white edged with deep rose-pink petals, creating a mesmerising visual effect. Flowering from May until October, 'Sincerity Rose Bicolour' adds extraordinary long-lasting colour to your garden. The flowers stand tall on strong, sturdy stems, making them perfect for cutting and adding to floral arrangements. This variety is also highly attractive to pollinators, helping to support local wildlife. Growing to a height of about 60 cm, this Dahlia is ideal for the middle or back of borders, providing a spectacular backdrop for shorter plants. It thrives in well-drained soil and a sunny location, making it a go-to choice for various garden styles, including cottage gardens, mixed perennial beds, and even urban gardens. Our growing team loves to plant 'Sincerity Rose Bicolour' alongside other Summer blooms like Echinacea and Salvia for a vibrant, textured and dynamic display. Its head-turning flowers and easy care nature make it a favourite for gardeners looking to add a touch of refinement to their garden spaces or their vases!

Planting Conditions

To plant your Dahlia, we recommend choosing a sunny spot in the garden that receives at least 6 hours of direct sunlight daily. The soil should be well-drained and enriched with compost or organic matter. Plant the Dahlia with spacing of 30-60 cm apart to allow for growth and air circulation. We advise the planting location is sheltered from strong winds to prevent damage. Water the Dahlia regularly to support its establishment, keeping the soil moist but not waterlogged, to promote healthy growth and vibrant blooms.

Watering & Feeding

To water and feed your Dahlia, we recommend adding granular feed to the compost before planting. Once planted, water regularly to help establish the plant. Make sure to direct your watering can or hose to the base of the plant, ensuring the water soaks down to the roots. This deep watering helps promote strong root growth. Dahlias thrive with consistent moisture, so keep the soil evenly moist but not waterlogged. During the growing season, consider using a balanced liquid fertiliser every 2-4 weeks to encourage robust blooms.

General Care

If your Dahlia has large flowers you may need to put stakes in the ground, one per stem and tie the stems to the posts to support the weight of the flower. As the flowers fade, cut back the stems to a leaf joint, as this will encourage the plant to keep producing new buds. At the end of the season you can leave the Dahlia tuber in the ground if they are planted in a very free draining position and you live in a warmer part of the UK. You will need to cover it with at least 6 inches of mulch, for example bark chippings. You can also dig the tuber up, shake off the excess soil and place it in a dark, dry and cool place for the Winter. Surround it with dry material like sand and replant it in the ground once there is no risk of frost in the next Spring. Dahlias can be prone to aphids, slugs, and fungal diseases; regular monitoring and care are advised.