Source: Dahlia ‘Honka’ short overview
Dahlia 'Honka' is a distinctive orchid-form dahlia known for pale yellow, star-shaped blooms with narrow incurved petals and a contrasting yellow center. Registered by J. A. Kieffer in 1990, this clump-forming tuberous perennial flowers from midsummer until frost and works well in sunny borders, containers, wildlife gardens, and cutting gardens. Give it fertile, well-drained soil, regular moisture, and winter protection where the ground freezes.
Taxonomic classification
Dahlia ‘Honka’ care guide
Light and placement
Place in full sun, ideally with at least 6 hours of direct light and good morning-to-afternoon exposure. In hot southern U.S. gardens, light afternoon shade can reduce heat stress. Too little light causes weak, stretched stems and fewer flowers; excessive heat combined with dry soil may cause wilting, faded blooms, or scorched foliage.
Watering and humidity
Water deeply when the upper inch of soil begins to dry, keeping moisture consistent while shoots, leaves, and buds are developing. Reduce watering after frost and during dormant tuber storage. Avoid frequent shallow sprinkling and saturated soil; wet foliage and poor drainage increase disease risk. Average outdoor humidity is adequate.
Soil and growing medium
Use fertile, humus-rich soil that drains freely yet holds even moisture. Loam amended with compost is ideal; heavy clay should be loosened and improved before planting. Dahlias tolerate acidic, neutral, or alkaline conditions, but avoid persistently waterlogged beds, which encourage tuber and crown rot.
Feeding
Incorporate compost before planting, then feed during active growth with a balanced or slightly lower-nitrogen fertilizer according to the product label. A light application when plants are established and another during bud formation is usually sufficient. Do not fertilize dry, drought-stressed, newly lifted, or dormant tubers.
Growth and habit
‘Honka’ forms a leafy clump from underground tubers and produces upright flowering stems through the warm season. Pinching the first central bud can encourage branching, while regular cutting or deadheading helps maintain flower production. A sheltered position reduces wind damage and supports straighter stems.
Planting and repotting
Plant after the danger of hard frost has passed and the soil has warmed. Set the tuber horizontally or with the crown slightly below the surface, with the growing eye near the top; avoid deep planting. Water lightly at first, then increase irrigation as shoots and foliage develop. Protect young growth from slugs.
For container plants, move tubers into a large pot with fresh, well-drained potting mix when growth begins. Repot only when necessary, since disturbing active roots can delay establishment. Choose a container with ample drainage and enough volume to support the plant through summer.
Propagation and pruning
Propagation
Maintain the cultivar by dividing tubers in spring, ensuring every division has a viable eye, or by taking softwood cuttings from shoots produced by stored tubers. Seed may produce variable offspring and will not reliably reproduce 'Honka'.
Pruning
Pinch growing tips or remove the first developing flower bud to encourage branching. Deadhead regularly to extend the display. After frost blackens the foliage, cut stems back near ground level before lifting the tubers for storage.
Overwintering
After the first killing frost, cut stems back and lift tubers in cold-winter regions. Let clumps dry briefly, remove loose soil, and store them in a cool, dark, frost-free place in slightly dry packing material. Check periodically for shriveling or rot. In mild climates, mulch heavily and leave tubers in the ground only where winter drainage is excellent.
Uses
Useful as a sunny border accent, container plant, cut flower, cottage-garden subject, and pollinator-garden perennial. Flowers are suitable for cutting and continued harvesting can encourage more blooms. Do not treat the plant as edible or medicinal; pet exposure should be managed because Dahlia species are listed as toxic to dogs and cats.
Appearance
The plant has mid-green foliage that is simple near the upper stems and pinnately divided lower down, commonly with three to five leaflets. Green stems support narrow-petaled, star-like flowerheads. The open orchid form and pale yellow coloration are the most useful identification features.
Flowering
This cultivar produces single orchid-form flowerheads with about eight narrow, incurved pale yellow petals around a yellow central disc. In typical U.S. garden conditions, flowering begins in midsummer and continues into fall until frost, especially when spent blooms are removed regularly.
Pollination and visitors
The open, single flower form exposes the central disc and provides accessible floral resources for bees, bumblebees, butterflies, and hoverflies. Documentation supports these visitor groups at the dahlia level, but no specific pollinator species is securely documented for this cultivar.
Dahlia 'Honka' photos
Click any photo for a larger view. Source, author and license are shown separately.
Diseases and pests
Diseases
Powdery mildew may develop in dry conditions, while gray mold and other fungal rots are favored by prolonged wetness. Improve air circulation, water at the soil surface, remove diseased foliage, and avoid storing damaged or damp tubers. Virus symptoms can include stunting, leaf markings, and distorted growth; discard affected plants.
Pests
Watch for slugs, snails, aphids, leaf miners, earwigs, caterpillars, capsid bugs, and glasshouse red spider mites. Inspect new growth regularly, keep surrounding vegetation open, hand-pick larger pests, and use targeted controls only when damage is significant. Avoid excessive nitrogen, which produces soft, pest-prone growth.
Toxicity and pollen
ASPCA lists Dahlia species as toxic to dogs and cats, with mild gastrointestinal signs and mild dermatitis reported; the toxic principles are not identified. Exact cultivar-specific toxicity data are unavailable, so prevent pets from chewing the plant and wash skin after handling if irritation occurs.
- Typical season
- Usually July through October in the United States
- Pollination / pollen
- Insect-dispersed, relatively heavy pollen
Dahlia flowers are insect-pollinated and generally release less easily airborne pollen than wind-pollinated plants, but they are not risk-free. Direct contact with Dahlia and other Asteraceae has been associated with allergic contact dermatitis. Sensitive gardeners should wear gloves and avoid rubbing the face after handling.
Native habitat
This is a cultivated hybrid selection rather than a naturally occurring wild population. Dahlias originate from upland and montane regions of Mexico and Central America, while ‘Honka’ is maintained in gardens as a summer-growing tuberous perennial in fertile, well-drained soils.
Interesting fact
‘Honka’ was registered in 1990 by J. A. Kieffer in Elmira, New York. The cultivar received the RHS Award of Garden Merit in 2000. Its orchid classification refers to the narrow, star-like petal arrangement. Stanford records describe green stems and leaves with three to five leaflets.
Frequently asked questions (FAQ)
The most relevant questions about this plant, with short and direct answers.
🌱Quick care
What kind of dahlia is Dahlia 'Honka'?⌄
Dahlia 'Honka' is a yellow orchid-type dahlia with single, star-shaped flowers and narrow, slightly incurved petals. It typically grows about 3 feet tall and produces blooms roughly 3 inches wide.
Is Dahlia 'Honka' easy to grow?⌄
Yes, Dahlia 'Honka' is generally easy to grow when planted in full sun, fertile well-drained soil, and moderate moisture. The main extra task in colder parts of the United States is lifting and storing the tubers for winter.
🌤️Environment and placement
How much sun does Dahlia 'Honka' need?⌄
Dahlia 'Honka' grows best with 6–8 hours of direct sun daily. In the hottest parts of the South, light afternoon shade can help protect the foliage and flowers from intense heat.
What soil is best for Dahlia 'Honka'?⌄
Use fertile, humus-rich soil that drains freely while retaining moderate moisture. Improve heavy or compacted soil with organic matter, but avoid sites that stay waterlogged because wet conditions can cause tuber rot.
Can Dahlia 'Honka' grow in a container?⌄
Yes, Dahlia 'Honka' can grow in a large container with drainage holes and fertile, well-drained potting mix. Choose a container large enough for the mature plant and monitor moisture more often than you would in the ground.
What USDA zones can grow Dahlia 'Honka'?⌄
Dahlia 'Honka' can be grown as a summer plant across most of the United States, but its tubers are not reliably frost-hardy. In colder climates, especially USDA Zones 7 and below, lift and store the tubers before winter.
💧Care and problems
How often should I water Dahlia 'Honka'?⌄
Water Dahlia 'Honka' deeply when the soil begins to dry, providing consistent moisture during active growth and flowering. Water at the soil level and avoid keeping the planting area soggy.
Does Dahlia 'Honka' need fertilizer?⌄
Dahlia 'Honka' benefits from fertile soil and moderate feeding during the growing season. Avoid excessive high-nitrogen fertilizer, which can produce leafy growth at the expense of flowers.
Does Dahlia 'Honka' need staking?⌄
Dahlia 'Honka' often has sturdy stems and may not require staking in a sheltered garden. Add a support if the plant is exposed to wind, grows unusually tall, or becomes top-heavy when flowering.
Should I pinch Dahlia 'Honka'?⌄
Yes, pinch out the growing tip when the plant is established and has several sets of leaves to encourage branching. This usually produces a bushier plant with more flowering stems.
Should I deadhead Dahlia 'Honka'?⌄
Yes, remove faded flowers from Dahlia 'Honka' regularly to keep the plant tidy and encourage continued blooming. Cut the spent flower stem back to a strong pair of leaves or a branching point.
What pests affect Dahlia 'Honka'?⌄
Common pests of Dahlia 'Honka' include aphids, slugs, snails, earwigs, leaf miners, and spider mites. Inspect new growth and flower buds regularly, especially during warm, damp, or crowded conditions.
What diseases can affect Dahlia 'Honka'?⌄
Dahlia 'Honka' can be affected by powdery mildew, gray mold, fungal rots, and dahlia viruses. Good air circulation, well-drained soil, careful watering, and removal of badly diseased growth reduce problems.
🪴Planting and repotting
When should I plant Dahlia 'Honka' tubers in the United States?⌄
Plant Dahlia 'Honka' tubers outdoors after the local danger of hard frost has passed and the soil has warmed. In short-season areas, start tubers indoors in containers several weeks earlier and transplant them carefully.
How deep should Dahlia 'Honka' tubers be planted?⌄
Plant Dahlia 'Honka' tubers horizontally with the crown or eyes facing upward, covering them with about 2–4 inches of soil. Add more soil as shoots grow if needed, but avoid planting in cold, saturated ground.
How far apart should Dahlia 'Honka' plants be spaced?⌄
Space Dahlia 'Honka' plants about 18–24 inches apart to provide room for branching and airflow. Use wider spacing in humid climates or where plants receive less than ideal air circulation.
Can Dahlia 'Honka' be started indoors?⌄
Yes, start Dahlia 'Honka' tubers indoors in a container several weeks before outdoor planting time. Keep the young plant in bright light, water lightly at first, and harden it off before transplanting.
✂️Propagation and pruning
How do I propagate Dahlia 'Honka'?⌄
Propagate Dahlia 'Honka' by dividing tubers or taking softwood cuttings from stored tubers in spring. Each tuber division must include a piece of crown with a viable eye to produce a new plant.
Can I grow Dahlia 'Honka' from seed?⌄
You can grow dahlias from seed, but seedlings will not reliably reproduce Dahlia 'Honka's exact flower form, color, or growth habit. Use tuber division or cuttings when maintaining this specific cultivar is important.
When should I lift Dahlia 'Honka' tubers for winter?⌄
Lift Dahlia 'Honka' tubers after the first killing frost has blackened the foliage, or before a forecast freeze in especially cold areas. Cut back the stems, dig carefully, and allow the tubers to dry briefly before storage.
How should I store Dahlia 'Honka' tubers over winter?⌄
Store Dahlia 'Honka' tubers in a cool, dark, frost-free place, commonly around 40–50°F, in a medium that prevents severe drying without staying wet. Check them periodically and remove any sections that become soft or rotten.
⚠️Toxicity and safety
Is Dahlia 'Honka' toxic to dogs and cats?⌄
Yes, Dahlia 'Honka' should be treated as toxic to dogs and cats because it is a dahlia cultivar. Ingestion may cause mild gastrointestinal upset or skin irritation, so contact a veterinarian if a pet eats the plant.
🌸Flowering and special interest
When does Dahlia 'Honka' bloom?⌄
Dahlia 'Honka' generally blooms from midsummer into fall, continuing until frost. In many gardens, flowering begins about 8–12 weeks after planting, depending on temperature, planting date, and growing conditions.
What do Dahlia 'Honka' flowers look like?⌄
Dahlia 'Honka' produces bright to pale yellow, single flowers with about eight narrow petals arranged in a distinctive star shape around a yellow center. The flowers are lightly fragrant, which is unusual among many dahlias.
Is Dahlia 'Honka' good for cut flowers?⌄
Yes, Dahlia 'Honka' is useful as a cut flower because its unusual yellow, star-shaped blooms add an airy form to arrangements. Cut flowers when they are freshly open and keep removing spent blooms to support further production.
Do bees visit Dahlia 'Honka'?⌄
Bees may visit Dahlia 'Honka' because its single flowers expose the central disc more openly than heavily double dahlias. Pollinator activity varies with local bee populations, weather, and nearby competing flowers.
