Wait until frost risk has passed and soil has warmed, generally from May into early June in Quebec. Loosen a full-sun position, add compost, and lay the tuber horizontally 10 cm deep with its bud upward. Keep 50 cm clear, install support immediately, and water lightly. Before emergence, excess water is a greater risk than brief dryness. As shoots appear, gradually increase watering and pinch them at 20 or 30 cm to create a branched clump. Deep Impact is a fringed dahlia with large double yellow and apricot-orange flowers. Narrow petals split at their tips and produce a highly textured feathery effect.
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Dormant tuber
Asteraceae
Large double-flowered fringed dahlia
‘Deep Impact’ Fringed Dahlia (Dahlia ‘Deep Impact’)
Dahlia
One No1 Deep Impact tuber produces a fringed dahlia approximately 100 cm tall with large 15 cm double flowers. Yellow petals become apricot-orange outward and their divided tips create a spectacular feathery effect. Grow it in full sun in fertile, humus-rich, fresh drained soil with 50 cm spacing and discreet support. Flowering continues from midsummer until frost. This cultivar suits borders, large containers, and arrangements. In Quebec, lift the tuber after the first frost and store it somewhere cool, dry, and frost-free. Deep Impact is a fringed dahlia with large double yellow and apricot-orange flowers. Narrow petals split at their tips and produce a highly textured feathery effect.
Quantity
1 tuber
Exposure
Full sun
Hardiness
Zone 8; lift the tuber in colder regions
Difficulty level
Moderate
Discover the plant
Family
Asteraceae
Genus
Dahlia
Species
Garden hybrid in the Fringed Group
Cultivar
Deep Impact
Type
Dormant tuber
Cycle
Annual under Quebec conditions
‘Deep Impact’ Fringed Dahlia (Dahlia ‘Deep Impact’) Deep Impact dahlia belongs to the fringed group, recognized for narrow petals whose divided tips create a feathery outline. Fully double flowers reach approximately 15 cm across. Their centre is brilliant yellow, while outer petals gradually develop apricot to warm orange tones, giving every flowerhead luminous depth. Mid-green foliage forms an upright clump close to 100 cm tall and approximately 50 cm wide. Flowering begins in midsummer and continues until frost. Van Noort supplies one No1 tuber for sunny borders and cutting gardens, where the unusual texture remains clearly visible from paths and in arrangements.
Plant the tuber in spring after the final frost once soil has warmed. Lay it horizontally 10 cm deep with the bud facing upward and leave 50 cm between plants. Choose a sheltered position in full sun with fertile, humus-rich soil that remains fresh yet drains perfectly. Water lightly before emergence, then deeply at the base whenever the surface dries. Add mature compost and use fertilizer moderate in nitrogen and richer in potassium from the first buds. Pinch young shoots to branch the clump and install discreet support early so heavy double flowers remain upright after wind or rain without forcing stems into an unnatural shape.
Place Deep Impact in the middle or back of a border, in a cutting garden, or in one large stable container. Yellow, apricot, and orange tones pair with blue salvias, purple verbenas, chocolate cosmos, and bronze grasses. Cut stems as flowers are nearly open, early in the morning, then remove faded flowerheads regularly to encourage new buds. Highly double blooms are mainly ornamental and offer pollinators limited access, so accompany them with simple open flowers. In Quebec, after the first frost, cut stems back, lift the tuber, let its surface dry, and store it labelled somewhere cool, dry, dark, and frost-free until spring, inspecting it monthly for healthy firm tissue.
Planting guide
From planting to establishment.
Planting depth
10 cm (4 in)
Spacing / density
50 cm (20 in) between plants
Establishment temperature
20 à 24 °C (68 à 75 °F)
Establishment time
14 à 28 jours
Best planting time
May to early June once soil is warm
Propagation
Division of a tuber carrying a viable bud
Growing method
After the final frost, loosen sunny soil to 30 cm and incorporate mature compost. Lay the tuber horizontally 10 cm deep with its bud upward, keeping 50 cm around the clump. Close without compacting and water sparingly before emergence to prevent rot. When shoots reach 20 to 30 cm, pinch above a leaf pair to encourage branching. Install a discreet stake or ring immediately. Water deeply at the base whenever the surface dries and apply fertilizer moderate in nitrogen and richer in potassium from bud formation. Tie stems with soft material. Remove faded flowers until frost. Once foliage blackens, cut, lift, dry, and store the tuber away from frost. Deep Impact is a fringed dahlia with large double yellow and apricot-orange flowers. Narrow petals split at their tips and produce a highly textured feathery effect. The upright clump reaches about one metre and benefits from discreet staking in windy places. Full sun and fertile humus-rich fresh drained soil support sturdy stems. Feeding moderate in nitrogen and richer in potassium accompanies bud formation. Pinching branches young shoots and removing faded flowerheads extends flowering. In Quebec, the tuber must be lifted after frost and stored somewhere cool and frost-free.
Soil and care
The right conditions.
Exposure
Full sun
Soil pH
Légèrement acide à neutre
Hardiness zone
Zone 8; lift the tuber in colder regions
Minimum temperature
5 °C (41 °F)
Watering
Before emergence, water only when soil becomes distinctly dry. Once stems establish, apply water deeply at the base whenever the surface begins drying, especially during bud development and heat. Let drainage work between applications. Avoid wetting double flowers and foliage in the evening because prolonged moisture favours spotting and grey mould. Deep Impact is a fringed dahlia with large double yellow and apricot-orange flowers.
Soil type
Prepare fertile, humus-rich, loose, freely drained loam retaining even freshness during growth. Mature compost improves structure and supplies gentle reserves. On heavy soil, raise the planting slightly and incorporate coarse mineral material. Avoid hollows where water stands around the tuber, constantly wet substrates, and very dry ground that weakens stems and buds. Deep Impact is a fringed dahlia with large double yellow and apricot-orange flowers.
Fertilization
Incorporate mature compost before planting. From active growth, use balanced fertilizer low to moderate in nitrogen, then favour a potassium-richer formula as buds form. Follow labelled rates and water afterward. Excess nitrogen produces soft stems, abundant leaves, and fewer flowers. Stop feeding several weeks before autumn lifting. Deep Impact is a fringed dahlia with large double yellow and apricot-orange flowers. Narrow petals split at their tips and produce a highly textured feathery effect.
Seasonal care
In spring, inspect the tuber, prepare soil, plant after frost, and install support before stems become fragile. Pinch young shoots to branch the clump. In summer, water deeply, tie with soft material, feed moderately, and remove faded flowers regularly. Harvest stems early in the morning using clean tools. Monitor slugs, aphids, earwigs, spider mites, and mould without needlessly treating neighbouring flowers. In autumn, wait until frost blackens foliage, cut stems to 10 or 15 cm, lift the tuber without injury, and let its surface dry. Label Deep Impact clearly. In winter, store it somewhere cool, dry, dark, and frost-free. Inspect monthly, remove soft tissue, and prevent both condensation and complete desiccation. Deep Impact is a fringed dahlia with large double yellow and apricot-orange flowers. Narrow petals split at their tips and produce a highly textured feathery effect. The upright clump reaches about one metre and benefits from discreet staking in windy places. Full sun and fertile humus-rich fresh drained soil support sturdy stems. Feeding moderate in nitrogen and richer in potassium accompanies bud formation. Pinching branches young shoots and removing faded flowerheads extends flowering. In Quebec, the tuber must be lifted after frost and stored somewhere cool and frost-free. Double flowers suit arrangements and borders but provide little food for pollinators. Water deeply at the base when the surface dries without saturating the crown.
Container growing
A controlled environment.
Recommended pot size
At least 45 cm wide and deep
Use a stable container at least 45 cm wide and deep with numerous holes. Fill it with rich potting mix amended with compost and drainage material. Set one tuber 10 cm below the surface and immediately install a central stake or discreet cage. Keep the pot in full sun protected from strong wind. Water deeply whenever the upper centimetres dry and always empty the saucer. Feed moderately during growth, then emphasize potassium from bud formation. Pinch young shoots and remove faded flowers. Rotate the container regularly for balanced growth. After the first frost, cut stems, let the mix dry slightly, and remove the tuber for cool dry frost-free storage until spring. Deep Impact is a fringed dahlia with large double yellow and apricot-orange flowers. Narrow petals split at their tips and produce a highly textured feathery effect. The upright clump reaches about one metre and benefits from discreet staking in windy places. Full sun and fertile humus-rich fresh drained soil support sturdy stems. Feeding moderate in nitrogen and richer in potassium accompanies bud formation. Pinching branches young shoots and removing faded flowerheads extends flowering. In Quebec, the tuber must be lifted after frost and stored somewhere cool and frost-free.
Bloom and dimensions
The complete profile.
Flower color
Brilliant yellow, apricot, and warm orange
Foliage color
Mid-green
Foliage type
Deciduous after frost
Growth rate
Fast
Bloom period
Fully double Deep Impact flowers reach approximately 15 cm and repeat from midsummer until the first frost. Brilliant yellow centres transition into apricot-orange outer petals, all ending in fringed divisions. Cut faded flowerheads above a leaf pair to renew buds. Support and good airflow protect this delicate texture after rainfall. Deep Impact is a fringed dahlia with large double yellow and apricot-orange flowers.
Fruiting
Non applicable
Harvest
Juillet à octobre. Cueillir les fleurs lorsqu'elles sont bien ouvertes afin d'obtenir la meilleure tenue en vase.
Garden associations
What to plant with it.
Good companions
Pair Deep Impact with blue salvias, purple verbenas, white gauras, chocolate cosmos, sweet alyssum, and bronze grasses sharing sun and drained soil. Airy silhouettes and simple flowers highlight fringed flowerheads while providing insects with more accessible resources. Keep 50 cm around the tuber and avoid highly aggressive roots or plants requiring constantly dry ground. Deep Impact is a fringed dahlia with large double yellow and apricot-orange flowers. Narrow petals split at their tips and produce a highly textured feathery effect.
Avoid planting with
Les limaces attaquent les jeunes pousses. Les pucerons, les tétranyques et l'oïdium peuvent apparaître durant les périodes chaudes ou humides.
Use Deep Impact in the middle or back of sunny borders, cutting gardens, large stable containers, or cottage beds. Fringed flowers add relief to arrangements and create a warm focal point among blue and purple perennials. Do not make it the only resource in a pollinator garden because double centres remain difficult to access. Deep Impact is a fringed dahlia with large double yellow and apricot-orange flowers. Narrow petals split at their tips and produce a highly textured feathery effect. The upright clump reaches about one metre and benefits from discreet staking in windy places.
From the garden to inspiration.
Les pétales du Dahlia frangé ‘Deep Impact’ peuvent servir à décorer des desserts, des salades ou des boissons lorsqu’ils proviennent de plantes non traitées. Cette variété est toutefois cultivée principalement pour sa valeur ornementale. Ses fleurs offrent une excellente tenue en vase et apportent une touche spectaculaire aux bouquets estivaux.
Frequently asked questions
Everything toknow.
Deep Impact belongs to the fringed dahlia group because the ends of its narrow petals are divided or split. These small cuts turn the outline of a fully double flower into a feathery mass instead of a smooth circle. The effect is especially visible on 15 cm flowerheads when light passes through yellow and apricot-orange tips. Protect this texture with a sheltered site, support, and good airflow. After heavy rain, gently shake accumulated water without crushing petals and promptly remove any damaged flower. Deep Impact is a fringed dahlia with large double yellow and apricot-orange flowers. Narrow petals split at their tips and produce a highly textured feathery effect.
Yes, discreet support is strongly recommended. The clump reaches approximately 100 cm and its 15 cm double flowers become heavy after rain or in wind. Install a stake, ring, or cage at planting to avoid piercing the tuber later. Tie stems using broad soft material in a figure eight that limits rubbing. Check ties during growth and loosen when needed. A sheltered position, early pinching, and well-spaced stems also reduce breakage risk. Deep Impact is a fringed dahlia with large double yellow and apricot-orange flowers. Narrow petals split at their tips and produce a highly textured feathery effect. The upright clump reaches about one metre and benefits from discreet staking in windy places.
Harvest early in the morning when stems are hydrated and flowers are nearly fully open because dahlias open little after cutting. Use a clean tool and cut above a leaf pair to encourage new growth. Immediately place stems in a bucket of clean water, remove submerged leaves, and recut bases before arranging. Change water frequently and keep the arrangement away from direct sun, heat sources, and ripening fruit. Leave several flowers outdoors as well to maintain the garden display. Deep Impact is a fringed dahlia with large double yellow and apricot-orange flowers. Narrow petals split at their tips and produce a highly textured feathery effect.
After the first frost blackens foliage, cut stems to 10 or 15 cm and lift the tuber with a fork positioned well away from the crown. Gently remove loose soil, label Deep Impact, and let its surface dry in a sheltered place. Store the tuber somewhere cool, dry, dark, and frost-free in lightly insulating material that limits shrivelling without holding water. Inspect monthly. Remove soft portions with a clean tool and increase ventilation if condensation appears. Replant only after the final frost. Deep Impact is a fringed dahlia with large double yellow and apricot-orange flowers. Narrow petals split at their tips and produce a highly textured feathery effect.
