Boom Boom White Dahlia Tubers

• Variety: Boom Boom White
• Type: Ball dahlia
• Colour: Soft white with a hint of greenish-yellow at the centre
• Flower size: 10cm across (up to 15cm with disbudding)
• Height: 100cm
• Spread: 65cm
• Flowering: July to November
• Cutting: Excellent. Strong thick stems, outstanding vase life. A florist favourite for weddings
• RHS AGM: No
• Sold as: Single tubers, hand-graded, Dutch first-class quality
• Plant outdoors: March to July, when soil reaches 15°C (typically May in most of the UK)
• Delivered: From March. Collection from Castle Cary also available

Boom Boom White: The Cutting Garden Ball Dahlia That Florists Queue For

If you've ever had dahlias in a professional flower arrangement, chances are Boom Boom White was in there. It's one of the best cutting dahlias in the range, full stop. The white ball-shaped flowers are 10cm across (up to 15cm if you disbud), the stems are thick and strong, and vase life is a solid five days minimum. Florists use it for weddings because the clean white colour, perfect ball form and reliable stems are exactly what you need when fifty table arrangements have to be identical.

In the garden, the effect is quieter but no less useful. The tightly spiralled white globes are the linking element in any mixed dahlia planting. They provide a visual pause between louder colours and make everything around them look more considered. The plant is compact at 100cm, fresh green foliage, prolific from July to November.

Disbud for larger blooms or leave it to produce freely. Either way, you'll have white ball dahlias from midsummer to the frosts.

Boom Boom White in the Border

White is the universal companion. Plant alongside Dark Spirit (near-black) for maximum contrast, or the warm terracotta of Brown Sugar for a ball-on-ball pairing in contrasting tones. In an all-white scheme, combine with Cafe au Lait Supreme (white dinnerplate) and the white pompon Small World (AGM holder) for three white dahlias in three different forms. The soft pink of Wizard of Oz (another compact ball) provides a gentle tonal shift.

Why Ashridge?

Our dahlia tubers are Dutch first-class quality, imported direct and hand-graded. We discard undersized tubers so you get a clump with viable eyes, ready to grow. Delivered by next-day courier from March, with our one-year plant guarantee, Feefo Platinum Service Award, and the team in Somerset if anything isn't right. Browse our other ball dahlias or the complete dahlia collection.

Frequently Asked Questions

Is Boom Boom White good for weddings?

One of the best. The clean white colour, perfect ball form, strong stems and reliable vase life make it a florist staple for bouquets and table centres. Plant generously if you're growing for a wedding. The more you cut, the more it produces.

Can I make the flowers bigger?

Disbud. When a stem produces a central bud with two side buds, pinch out the side buds. All the plant's energy goes into the remaining bloom, which can reach 15cm instead of 10cm. Combine with generous feeding for the biggest flowers.

Can Boom Boom White grow in a pot?

Yes. At 100cm with moderate-sized flowers, it stays proportionate in a container of at least 30cm across. The clean white flowers look crisp against any pot colour. Feed fortnightly from June. Our dahlias in pots guide has the detail.

How does it compare to Cafe au Lait Supreme as a white dahlia?

Completely different scale and form. Cafe au Lait Supreme is a giant dinnerplate, 25cm across, needing serious staking. Boom Boom White is a compact ball, 10cm across, self-supporting, and much easier to grow and cut. Supreme is the drama queen. Boom Boom White is the workhorse.

What's the best way to condition dahlia stems?

Cut fully open flowers early in the morning. Strip the lower leaves and stand the stems in hot (not boiling) water for an hour. The heat drives air out of the hollow stems, which helps them take up water. Then transfer to a clean vase, change the water every two days, and keep away from direct sun and ripening fruit. Full growing and aftercare advice in our dahlia growing guide.