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Tuber
Asteraceae
Dahlia pompon 'Bolt' (Dahlia)
Dahlia × pinnata
The 'Bolt' pompom dahlia (Dahlia × pinnata 'Bolt') captivates with its perfectly spherical, luminous pale yellow, almost cream-colored flowers, composed of short, tightly folded petals. From July until the first frosts, this variety reaches approximately 70 cm (28 in) in height and offers abundant blooms that bring softness and brightness to summer arrangements. Not hardy in Quebec, this tender perennial is grown as an annual, but its tuber can be dug up in the fall and stored in a frost-free environment during the winter. Plant the tuber in spring, when all risk of frost has passed, about 10 cm (4 in) deep in rich, loose, compost-enriched, and perfectly drained soil. Choose a location in full sun receiving at least six hours of direct light per day, then space plants 30 to 40 cm (12 to 16 in) apart.
- Quantity
- 1 tuber
- Exposure
- Sun
- Life cycle
- Tender perennial
- Hardiness
- Area 8
Discover the plant
Common nameDahlia pompon ‘Bolt’
FamilyAsteraceae
GenusDahlia
TypeTuber
Botanical nameDahlia × pinnata
‘Bolt’ pompon dahlia (Dahlia) captivates with its perfectly spherical, bright pale yellow, almost cream-coloured flowers, composed of short, tightly folded petals. Their dense and regular texture creates a neat and refined silhouette, beautifully highlighted by dark green foliage. From July until the first frosts, this variety reaches approximately 70 cm (28 in.) in height and offers abundant blooms that bring softness and clarity to summer arrangements. Not hardy in Quebec, this tender perennial is grown as an annual, but its tuber can be dug up in the fall and stored in a frost-free environment during winter.
Plant the tuber in spring, once all risk of frost has passed, about 10 cm (4 in.) deep in rich, loose, compost-enriched, and well-drained soil. Choose a full sun location receiving at least six hours of direct light per day, then space plants 30 to 40 cm (12 to 16 in.) apart. Water lightly until shoots appear, then keep the soil uniformly moist without saturating it. Pinch young stems to encourage a more branched and floriferous plant, then regularly remove faded flowers. In the fall, dig up the tuber and store it in a cool, dry, and frost-free place.
The ‘Bolt’ dahlia is perfect for borders, flower beds, large containers, and cutting gardens. Its cream-yellow flowers combine harmoniously with salvias, cosmos, yarrows, Verbena bonariensis, and ornamental grasses to create luminous and balanced scenes. Their regular shape and excellent vase life make them an ideal choice for elegant and long-lasting bouquets. Its blooms can also attract various pollinators during the summer. Petals from untreated plants can be used to decorate desserts or salads.
Planting guide
Plant well.Grow beautifully.
Planting depth
10 cm (4 in)
Best planting time
Spring
Propagation
Divide the tubers in spring when each section has at least one viable eye. This method ensures that the variety's characteristics are faithfully preserved.
Growing method
Plant the tuber after the last frost in fertile, light, and well-drained soil. Bury it about 10 cm (4 in) deep with the eyes facing upwards. Water lightly until the first shoots appear, then gradually increase watering. Pinch back young stems to encourage a more branched and floriferous plant. Regularly remove spent flowers to prolong blooming until the first frosts. Organic mulch helps maintain constant moisture during the summer. Not hardy in Quebec, this tender perennial is grown as an annual, but its tuber can be dug up in the fall and stored in a frost-free place during winter. Plant the tuber in spring, once all risk of frost has passed, about 10 cm (4 in) deep in rich, loose, compost-enriched, and perfectly drained soil. Choose a full sun location receiving at least six hours of direct light per day, then space plants 30 to 40 cm (12 to 16 in) apart. Water lightly until shoots appear, then keep the soil evenly moist without overwatering. In the fall, dig up the tuber and store it in a cool, dry, and frost-free place.
Soil and care
The right care,at the right time.
Soil pH
Slightly acidic to neutral
Minimum temperature
5 °C (41 °F)
Care level
Easy
Watering
Water regularly to keep the soil consistently moist without overwatering. Organic mulch helps retain moisture during hot periods. Before watering, check the moisture below the surface with your finger rather than following a fixed schedule. Recent rain, wind, and container cultivation can quickly alter watering needs. Direct the water towards the soil, at the base of the plant, and allow any excess to drain freely.
Soil type
Plant the tuber in spring, when all risk of frost has passed, about 10 cm (4 in) deep in rich, loose, compost-enriched, and well-drained soil. Choose a full-sun location that receives at least six hours of direct sunlight per day, then space plants 30 to 40 cm (12 to 16 in) apart. Water lightly until sprouts appear, then keep the soil uniformly moist without overwatering. In the fall, dig up the tuber and store it in a cool, dry, and frost-free place.
Fertilization
Apply a potassium-rich fertilizer as soon as flower buds form to support abundant blooming. Avoid excess nitrogen, which primarily promotes foliage. Respect the dosage indicated on your fertilizer packaging and measure the quantity before applying. Take into account compost and other previously applied inputs to avoid fertilizing the same plant twice.
Seasonal care
Plant in spring after all risk of frost has passed and the soil has warmed sufficiently. Choose a sunny location, sheltered from strong winds, in fertile, well-drained soil. Arrange the tuberous roots with their crown and buds pointing upwards, without breaking the fragile attachments. Install a stake at the time of planting if support will be needed, to avoid damaging the roots later. Water sparingly at the start, then adjust the watering frequency according to foliage growth. Avoid constantly waterlogged soil around the tubers, especially before the first shoots appear. During summer, water at the base when the soil dries out and tie the stems as needed with flexible ties. Regularly remove faded flowers to encourage the formation of new buds. For bouquets, choose fully open flowers and use a clean tool to make a clean cut. In autumn, plan for overwintering the tubers in a frost-free environment: dahlias do not overwinter in the ground in Quebec. After vegetation ends, carefully dig up the clump, allow its surface to dry, and store it in a cool, airy, frost-free space. Inspect it periodically to identify damaged parts. Throughout the seasons, observe new shoots, soil moisture, and the condition of the stems. A durable label allows you to locate the planting during its dormancy. Clean tools after cutting diseased parts and remove debris decaying around the base.
Container growing
A garden,within reach.
Recommended pot size
35 cm (14 in)
Container gardening requires planning for the necessary volume for the roots and the final height of the plant. Choose a stable pot with drainage holes and a substrate suitable for planting. Leave enough space to respect the recommended depth and spacing, rather than crowding plants to immediately fill the pot. Place the container in the indicated exposure and regularly check the moisture, especially in hot or windy weather. A pot is more exposed to temperature variations than a plant in open ground. Therefore, plan for a wintering location from the outset that is compatible with the plant's needs and your region's climate. Plant in spring when all risk of frost has passed and the soil is sufficiently warmed. Choose a sunny location, sheltered from strong winds, in fertile and well-drained soil. Arrange the tuberous roots with their crown and buds facing upwards, without breaking the fragile attachments. Install a stake at planting if support will be necessary, to avoid damaging the roots later. Water sparingly at the start, then adapt the watering to the foliage growth. Constantly saturated soil around the tubers should be avoided, especially before the appearance of the first shoots. Plan to bring the storage organs indoors, away from frost, for the Quebec winter.
Bloom and dimensions
Its place,in your garden.
Mature height
70 cm (28 in)
Width / spread
30 to 40 cm (12 to 16 in.)
Flower color
Cream yellow
Foliage color
Dark green
Foliage type
Null and void
Growth rate
Quick
Bloom period
Abundant bloom of cream-yellow pompom flowers from July until the first frosts. Dahlia ‘Bolt’ (Dahlia × pinnata ‘Bolt’) captivates with its perfectly spherical, luminous pale yellow, almost cream flowers, composed of short, tightly folded petals. From July until the first frosts, this variety reaches approximately 70 cm (28 in) in height and offers a generous bloom that brings softness and clarity to summer arrangements. Its cream-yellow flowers harmoniously combine with salvias, cosmos, yarrows, Verbena bonariensis, and ornamental grasses to create bright and balanced displays.
Harvest
July to October. Harvest flowers when fully open for excellent vase life. Continue to deadhead to prolong production.
Garden associations
In goodcompany.
Companion plants
To accompany 'Bolt' pompom dahlias, you can consider cosmos, zinnias, or ornamental salvias. Choose companion varieties based on their height, flowering period, and the colors you want to combine. Most importantly, ensure their sun exposure and water requirements are suitable for the same location. Leave enough space so that leaves do not obscure young shoots and to allow easy access to each plant during maintenance. These combinations are meant to create the garden's aesthetic; they do not guarantee protection against pests or diseases. Adjust the arrangement after observing one growing season.
Frequently asked questions
Your questions,answered.
How to successfully plant Dahlia pompon ‘Bolt’?
Plant in spring when all risk of frost has passed and the soil is sufficiently warm. Choose a sunny location, sheltered from strong winds, in fertile and well-drained soil. Arrange the tuberous roots with their crown and buds pointing upwards, without breaking the fragile attachments. Install a stake at planting if support will be necessary, to avoid damaging the roots later. Water sparingly at the start, then adjust watering based on foliage growth. Constantly waterlogged soil around the tubers should be avoided, especially before the appearance of the first shoots.
What light should I provide for Dahlia pompon 'Bolt'?
The recommended exposure is full sun. Observe the light in your chosen location in the morning and afternoon, as the shade from trees or buildings changes throughout the day. Also consider neighboring plants: their foliage can obscure a young planting as it develops. If in a container, place the pot where you can move it if conditions become too hot or too shady. Suitable exposure must go hand in hand with proper soil and watering. If you move a plant started indoors to the outdoors, gradually accustom it to garden conditions to avoid too abrupt a transition for young leaves.
How to adjust watering?
Water according to the actual soil moisture, taking into account rain, heat, and wind. Check below the surface before deciding on further watering: a dry surface can still be moist at the root level. Direct water to the base of the plant and let it penetrate, without keeping the plant in saturated soil. Containers generally require more frequent checks because they dry out faster. Ensure that their drainage holes remain clear and empty any saucers that retain water. Also adapt care to the plant's cycle: active growth and a dormant period do not require the same amount of water.
What should I plan for container gardening?
Container cultivation requires planning for the volume needed for the roots and the plant's final height. Choose a stable pot with drainage holes and a suitable potting mix. Leave enough space to respect recommended depths and spacing, rather than crowding plants to fill the pot immediately. Place the container in the indicated exposure and regularly check moisture levels, especially in hot or windy weather. A pot is more exposed to temperature variations than in-ground planting. Therefore, plan for a wintering location from the outset that is compatible with the plant's needs and your region's climate.
What aftercare is needed after the growing season?
During the summer, water at the base when the soil dries out and tie up stems as needed with flexible ties. Regularly remove faded flowers to encourage new bud formation. For bouquets, choose fully open flowers and use a clean tool to make a clean cut. In the fall, plan to overwinter tubers away from frost: dahlias do not overwinter in the ground in Quebec. After the growing season ends, carefully dig up the clump, let its surface dry, and store it in a cool, airy, frost-free place. Inspect it periodically for damaged parts.
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