How to Grow Cynoglossum hungaricum
(Hungarian Hound's Tongue) from Seed
The rare collector's Cynoglossum — a hardy perennial from central and eastern Europe producing soft rose-pink flowers on upright stems from spring into midsummer, with the distinctive rough, velvety, dog's-tongue leaves of its family; rarely offered in the UK trade and all the more worth growing for it
When most gardeners think of Cynoglossum, they think of the vivid sky-blue of the common Chinese Forget-me-not (C. amabile). Cynoglossum hungaricum offers something genuinely different from within the same genus: not blue but a soft, warm rose-pink, and not an annual but a hardy perennial that establishes itself in the garden and returns year after year. It is, as the Bishy Barnabees product description notes, "a rare find in the UK gardening market" — most growers are familiar only with the blue-flowered species, and the pink-flowered Hungarian species occupies a genuinely unusual position in the UK cottage garden plant palette.
The plant belongs to the Boraginaceae — the borage and forget-me-not family — and shares the characteristic rough, hairy leaves of its relatives. These leaves, described since antiquity as resembling a dog's tongue in texture and shape (giving the whole genus its name, from the Greek kynos glossa), add a tactile and textural dimension to the border that most smooth-leaved plants cannot provide. In flower, the upright rose-pink sprays bridge the gap between the spring biennials and the full summer perennials — a transition period when many borders have a lull that C. hungaricum fills particularly well.
Quick Facts at a Glance
Plant Type
Hardy Perennial (H5) — short-lived but vigorous
Colour
Soft rose-pink — warm and romantic; not blue
Origin
Central and eastern Europe; native wildflower
Height
60–90cm; upright stems; spring into midsummer
Rarity
Rare collector's species — seldom offered in UK
Difficulty
2 out of 5 — unfussy once established
Understanding the Plant
Cynoglossum hungaricum is a hardy perennial native to the dry grasslands and open woodlands of central and eastern Europe — Hungary, the Balkans, and surrounding regions. In habit it forms a clump of long, rough, lance-shaped leaves from which upright, branching flower stems emerge in late spring and early summer, bearing clusters of small funnel-shaped flowers in soft rose-pink. The plants are typically short-lived perennials — they may persist for two to four years — but they self-seed freely, maintaining a colony without any deliberate intervention. This self-seeding habit makes them, in practice, effectively permanent in a garden that suits them.
The Gap-Bridger — Spring to Summer Transition
One of the most useful things about C. hungaricum in the UK border is the timing of its flowers. It blooms from late spring into midsummer — precisely the period after spring biennials like wallflowers and forget-me-nots have finished and before the main flush of summer perennials takes hold. In this transition window, many borders have a colour gap that this plant fills elegantly with its rose-pink sprays. In a planting scheme designed for continuous colour, C. hungaricum earns its position not just for what it looks like but for when it flowers.
Collector's Status — Why It's Worth Seeking Out
The Bishy Barnabees description positions this honestly: it is "a rare find in the UK gardening market." Most UK nurseries and seed companies offer only C. amabile (the blue Chinese Forget-me-not) or occasionally 'Mystery Rose' (the pink cultivar of amabile). The true Hungarian species — a genuine central European native, hardier and more perennial in nature — is much less frequently available. Growing it from seed is, for most gardeners, the only realistic way to obtain it, which makes the seed packet a genuinely uncommon gardening opportunity.
Sowing & Growing On
Direct Sowing Preferred — Cynoglossum Dislikes Root Disturbance
Like most members of the Boraginaceae, C. hungaricum develops a taproot and resents transplanting. Direct sowing in the final position, or sowing into biodegradable modules if starting indoors, produces the strongest plants. If sowing indoors, plant module and all without disturbing the roots.
Sow direct outdoors March–May in final flowering position. Sow seeds 5–10mm deep on bare, raked, well-drained soil in full sun. Thin to 30cm apart when large enough to handle. This is the preferred method — direct-sown plants establish the strongest taproot and flower most freely.
Or sow indoors late winter at 15–20°C in biodegradable modules. February or early March for earlier flowers. Germination in 7–21 days. Grow on in cool, bright conditions. Plant out modules directly — do not bare-root transplant — after all frost risk has passed.
Plant in full sun in well-drained, even lean, soil. C. hungaricum is adapted to dry, often poor soils in its native range. It performs well on lean, gritty, or sandy soils where many plants struggle. Heavy, wet clay should be avoided or improved with grit. Once established it is remarkably drought-tolerant.
Allow to self-seed freely for a self-sustaining colony. After flowering, allow some seed heads to mature and drop. The self-seeded offspring establish freely in the garden, gradually building a colony that requires no further sowing. Self-seeded plants often flower more freely than deliberately transplanted ones.
Growing On & Care
Textural Foliage Value
The long, lance-shaped leaves of C. hungaricum are covered in fine, stiff hairs — rough and velvety to the touch, grey-green in colour. This texture is distinctive in a border where most plants have smooth or glossy leaves. In late winter and early spring before flowers appear, the rosette of rough grey-green leaves adds tactile interest alongside early bulbs and emerging perennials.
Colour Partnerships
The soft rose-pink works beautifully in pastel planting schemes: alongside the pure white pompoms of Achillea 'Ballerina' (Bishy's suggested companion), with blue Salvia nemorosa, blush Geranium endressii, or pale lavender Stachys. In a more contemporary scheme, the grey-green hairy foliage provides foliage contrast alongside silver Stachys byzantina and white Anthemis punctata.
Self-Seeding and Longevity
As a short-lived perennial, individual plants may decline after three to four years. The self-seeding habit is the practical solution — allow seed heads to mature in the garden and the colony renews itself continuously. Mark seed-set plants to avoid accidental removal. First-year plants produce the characteristic leafy rosette; second-year plants flower freely from the same rosette.
Pollinator Value
Like all Boraginaceae, the flowers of C. hungaricum provide readily accessible nectar and pollen to bees, bumblebees, and hoverflies. The spring-to-midsummer flowering period is particularly valuable for early bumblebee queens establishing new colonies. The rough foliage provides overwintering habitat for beneficial insects at ground level through winter.
Dry and Coastal Situations
The native habitat of dry central European grasslands makes C. hungaricum well-suited to challenging dry conditions in UK gardens: south-facing slopes, gravel gardens, raised beds, dry banks, and coastal gardens exposed to salt wind. In these situations where moisture-hungry plants struggle, the Cynoglossum thrives, self-seeds, and builds a colony with minimal intervention.
The Collector's Dimension
Part of the appeal of growing C. hungaricum is simply the rarity of it. Visitors with any botanical knowledge will notice it and ask about it. In a garden that aims to grow plants that are genuinely unusual rather than merely fashionable, this Hungarian native — rarely seen in UK gardens or nurseries — adds a dimension of botanical interest that the more commonly grown varieties cannot provide.
When to Sow and Flower
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 🌱 Sow | ||||||||||||
| 🌸 Flowers |
Common Problems & Solutions
| Problem | Likely Cause | What to Do |
|---|---|---|
| Poor germination | Cold soil; seeds too deep | Sow shallowly (5–10mm) in warm soil (above 10°C). Germination is more reliable in warm conditions — a late April or May direct sowing often germinates more readily than a cold March one. Indoors at 15–20°C gives the most reliable germination rate. |
| Transplant failure | Taproot disturbed at planting | Use biodegradable modules for indoor sowing, or direct sow in final position. Bare-root transplanting of Cynoglossum reliably causes setback or failure. Plant module and all without any root disturbance. |
| Plants not returning after first year | Short-lived nature; no self-seeding allowed | Allow seed heads to mature and drop before deadheading — the self-seeded offspring are the mechanism by which the colony persists. Mark seed-setting plants with a cane to prevent accidental removal during weeding. |
| Leaves yellowing; poor vigour | Waterlogged or clay soil | Improve drainage by incorporating grit into planting area, or grow in a raised bed. C. hungaricum is adapted to dry conditions and does not thrive in consistently wet soil. |
Plant Specifications
The rare pink Cynoglossum — a collector's perennial that bridges the late-spring gap with soft rose sprays
Direct sow in a sunny, well-drained spot from March and allow to self-seed freely. Cynoglossum hungaricum fills the late-spring gap between biennials and summer perennials with rose-pink sprays that visitors will always ask about — because almost nobody else is growing it. Once established, the self-seeding colony requires nothing further: just the decision not to weed out the seedlings.
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