Flowers that start with H include the one garden shrub whose colour you can change by altering the soil. Hydrangeas, hibiscus, hollyhocks, honeysuckle, hyacinths and hostas are the mainstays — alongside heather, hellebore and a handful of species that are genuinely toxic.
This guide covers 28 flowers beginning with H, with botanical names, plant type, bloom season and what makes each one distinctive. Toxic species are flagged.
Flowers Starting With H: Complete List
| Flower | Botanical Name | Type | Blooms | Notes |
|---|---|---|---|---|
| Hakone Grass | Hakonechloa macra | Grass | Summer | Japanese forest grass for shade |
| Haemanthus | Haemanthus spp. | Bulb | Late summer | Blood lily; brush-like flower head |
| Hare’s Ear | Bupleurum spp. | Perennial | Summer | Yellow-green bracts; florist favourite |
| Hardy Fuchsia | Fuchsia magellanica | Shrub | Summer–autumn | Pendant bicoloured bells; survives frost |
| Harebell | Campanula rotundifolia | Perennial | Summer | Scotland’s bluebell; thread-fine stems |
| Hare’s Tail Grass | Lagurus ovatus | Grass | Summer | Soft fluffy seed heads; dries well |
| Harlequin Flower | Sparaxis spp. | Corm | Spring | Vivid contrasting throat markings |
| Heartleaf Bergenia | Bergenia cordifolia | Perennial | Early spring | Leathery leaves redden in winter |
| Heart’s Ease | Viola tricolor | Annual | Spring–autumn | Wild pansy; edible flowers |
| Heather | Calluna / Erica | Shrub | Late summer | Needs acid soil; key moorland nectar |
| Helenium | Helenium spp. | Perennial | Late summer | Sneezeweed; drooping ray petals |
| Heavenly Bamboo | Nandina domestica | Shrub | Early summer | Not bamboo — berries toxic |
| Helianthus | Helianthus spp. | Annual / perennial | Summer | Sunflower genus; heads track sun as buds |
| Heliotrope | Heliotropium arborescens | Tender perennial | Summer | Cherry-pie scent — toxic |
| Helichrysum | Helichrysum spp. | Perennial | Summer | Everlasting; papery bracts hold colour |
| Hellebore | Helleborus spp. | Perennial | Winter | Flowers through frost — toxic |
| Hibiscus | Hibiscus spp. | Shrub | Summer | Each bloom lasts about a day |
| Hollyhock | Alcea rosea | Biennial | Summer | Tall spires; classic cottage-garden plant |
| Honesty | Lunaria annua | Biennial | Spring | Translucent silver seed discs |
| Honeysuckle | Lonicera spp. | Climber | Summer | Evening scent for hawkmoths |
| Hosta | Hosta spp. | Perennial | Summer | Grown for foliage; slug magnet |
| Hyacinth | Hyacinthus orientalis | Bulb | Spring | Powerful scent — bulbs toxic |
| Hydrangea | Hydrangea spp. | Shrub | Summer–autumn | Colour shifts with soil pH |
| Hypericum | Hypericum spp. | Shrub | Summer | St John’s wort; berries used by florists |
| Hyssop | Hyssopus officinalis | Perennial | Summer | Aromatic herb; heavily worked by bees |
| Hepatica | Hepatica spp. | Perennial | Early spring | Woodland; flowers before the leaves |
| Hoya | Hoya carnosa | Climber | Summer | Wax plant; scented star clusters |
| Hyacinth Bean | Lablab purpureus | Climber | Summer | Purple pods — raw beans toxic |
Garden Mainstays
Hydrangea
The famous colour change is real but applies only to bigleaf hydrangeas. Acid soil below about pH 6 makes aluminium available to the plant and the flowers turn blue; alkaline soil locks the aluminium away and they turn pink. White varieties will not change at all, since they have no pigment to work with. The showy parts are sterile bracts, not petals, which is why they last for months and dry so well.
Hollyhock
A cottage-garden classic reaching three metres, biennial or short-lived perennial, and it self-seeds so freely that a planting usually perpetuates itself. Nearly every hollyhock eventually gets rust, an orange fungal spotting on the leaves — it disfigures but rarely kills, and removing affected lower leaves and avoiding overhead watering keeps it manageable. Plant against a wall or fence; unsupported spires blow over.
Honeysuckle
Releases its scent in the evening rather than by day, because it is pollinated by night-flying hawkmoths that hover at the long tubular flowers. Climbing honeysuckles twine clockwise and need something to wrap around rather than a flat surface. Note the split: some species are valuable garden climbers, while Japanese honeysuckle is invasive across much of North America.
Hosta
Grown almost entirely for foliage rather than flowers, and the standard choice for dry shade. Its one serious weakness is slugs and snails, which shred the leaves — thick-leaved and heavily blue varieties are noticeably more resistant because the waxy coating is harder to rasp. The lavender or white flower spikes are a modest bonus.
Hibiscus
Each flower lasts roughly a single day, opening in the morning and collapsing by evening; a healthy plant simply produces a continuous succession. Hardy Hibiscus syriacus survives cold winters, while the tropical H. rosa-sinensis is a conservatory or patio plant outside the tropics. Hibiscus tea is made from the calyces of a different species again, H. sabdariffa.
Heather
Requires genuinely acid soil and will not tolerate lime, which is why it dominates moorland and fails in chalky gardens. It is one of the most important late-summer nectar sources in upland Britain, and heather honey is thixotropic — a jelly at rest that liquefies when stirred, so it has to be pressed rather than spun from the comb.
Hypericum
St John’s wort, grown in gardens for bright yellow flowers with prominent stamens and, increasingly, for the glossy berries that follow, which florists use heavily in autumn arrangements. The medicinal species H. perforatum is a different plant from the ornamental shrubs and interacts with a wide range of prescription drugs.
Hyssop
An aromatic Mediterranean subshrub with dense spikes of blue flowers, and one of the better bee plants for a dry sunny spot. It has a long history as a strewing and medicinal herb, and it appears in biblical texts — though the plant referred to there is probably not the same species.
Bulbs and Spring Flowers
Hyacinth
Among the most powerfully scented of all spring bulbs — a single forced bowl indoors can fill a room, to the point that some people find it overwhelming. Commercial bulbs are grown mainly in the Netherlands, and forcing them for winter flowering involves a controlled cold period that tricks the bulb into thinking winter has passed.
Warning: hyacinth bulbs are toxic if eaten, containing oxalic acid and other irritants, and handling them bare-handed causes an itchy contact dermatitis in many people — commonly called hyacinth itch among bulb workers. Wear gloves when planting, and keep bulbs away from pets, who may dig them up.
Hepatica
A woodland perennial flowering very early, often through leaf litter before the tree canopy closes and frequently before its own new leaves appear. The old leaves persist through winter and were thought to resemble the lobes of a liver, which gave the plant its name and, under the doctrine of signatures, its supposed medicinal use.
Haemanthus
The blood lily, a South African bulb producing a dense brush-like head of stamens with little visible petal. Some species flower on a bare stem before the leaves emerge. It needs a dry rest period and resents disturbance, so it is best left undisturbed in a pot for years.
Harlequin Flower
Sparaxis, a South African corm with flat six-petalled flowers in vivid colours, each with a sharply contrasting dark or yellow throat that gives the harlequin effect. It needs a hot dry summer dormancy, which is why it thrives in Mediterranean climates and rots in wet summers.
Wildflowers, Grasses and Foliage
Harebell
Thread-fine stems carrying nodding blue bells that tremble in the slightest breeze, growing on dry grassland and cliffs. It is called the bluebell in Scotland, which causes regular confusion with the English bluebell — an entirely different plant. Despite its delicate look it is tough and drought-tolerant.
Heart’s Ease
The wild pansy, and the ancestor of garden pansies. The flowers are edible with a mild flavour and are frequently crystallised or scattered on salads. It self-seeds prolifically and appears in cracks and gravel where nothing else establishes.
Hakone Grass
A slow-spreading Japanese woodland grass that cascades in overlapping layers, valued as one of the few ornamental grasses that genuinely thrives in shade. Golden variegated forms light up dark corners, and the foliage turns pink-bronze before dying back in autumn.
Hare’s Tail Grass
An annual grass grown for its soft, dense, oval seed heads that genuinely resemble a rabbit’s tail. It dries exceptionally well, holding both shape and softness, which makes it a staple of dried arrangements. It self-seeds readily in light soil.
Helichrysum
The strawflower, whose papery bracts are dry even on the living plant, so cut stems dry with almost no change in colour or form. Some species are grown instead for silver aromatic foliage — the curry plant, H. italicum, smells strongly of curry but is not the culinary spice.
Honesty
Grown less for its purple spring flowers than for what follows: flat, round seed pods that weather to translucent silvery discs, persisting on the plant into winter and used dried indoors. It is a biennial that self-seeds so reliably that one sowing usually establishes it permanently.
Hoya
The wax plant, a tropical climber with thick succulent leaves and clusters of star-shaped flowers that look almost artificial and produce sticky nectar. It flowers from short spurs that must not be removed after blooming, since the same spur flowers again year after year — deadheading them is the commonest reason a hoya stops flowering.
The Toxic Ones
Hellebore
Flowering through frost and snow from midwinter, hellebores are among the earliest garden flowers. They are not roses despite the common names Christmas rose and Lenten rose — they belong to the buttercup family and share its chemistry.
Warning: all parts of hellebore are toxic, containing irritant compounds and cardiac glycosides. Ingestion causes burning of the mouth, vomiting and, in quantity, effects on heart rhythm; the sap irritates skin. Wear gloves when cutting back old foliage, which is a routine winter job with this plant.
Heavenly Bamboo
Nandina domestica is not a bamboo at all but a shrub in the barberry family, grown for fine foliage that reddens in cold and for persistent red berries.
Warning: nandina berries contain cyanogenic compounds. They are of particular concern for birds — cedar waxwings, which gorge on fruit in flocks, have died in numbers after eating large quantities. If you grow it, cutting off the berry clusters removes the risk, and fruitless cultivars are available.
Heliotrope
Grown for a scent widely described as cherry pie or vanilla, and once a staple of Victorian bedding. All parts contain pyrrolizidine alkaloids, which are toxic to the liver with sustained exposure and are a recognised hazard to grazing livestock. It is safe to grow and enjoy, but it is not a plant to eat or to make preparations from.
Hyacinth Bean
A vigorous climber with purple stems, lilac pea flowers and glossy magenta pods, widely grown as an ornamental. The dried beans are eaten in parts of Asia and Africa — but only after prolonged soaking and boiling with changes of water, because raw and undercooked beans contain cyanogenic glycosides and have caused poisoning. Treat it as ornamental unless you know the preparation.
Other Species in This Group
Hare’s Ear
Since it swiftly establishes itself in cultivated soil, hare’s ear, an annual plant, is largely viewed as a weed in Western Europe and in some portions of the US. The plants have thin stalks that appear to puncture the perfoliate, ear-shaped leaves. Small, grouped, and colored greenish gold, the flowers are surrounded by pointy, yellow-green bracts.
Hardy Fuchsia
Hardy fuchsia is a sub-shrub with woody branches, deep-green ovate leaves, and tubular blooms that droop and come in shades of red and purple, pink and lavender, and even white. These lovely flowers that begin with the letter H can reach heights and diameters of ten feet in regions without frost. They are excellent ornamental plants in colder climates and are frequently cultivated in hanging baskets to display their seductive blossoms. In flower lore, scarlet fuchsia blossoms represent taste.
Heartleaf Bergenia
A perennial plant called Bergenia cordifolia has basal clusters of sizable, heart-shaped leaves. The diameter of the leaf clusters increases to one to two feet. From the middle of the plants, thick, reddish, twenty-four-inch stems emerge that are covered in profusions of tiny clusters of red, pink, and white flowers. Heartleaf bergenia flowers are excellent for mass planting in slopes or broad flower beds because they draw butterflies.
Helenium
There are 33 recognized species of daisy-like flowers in the Helenium genus, which can bloom in hues of red, orange, yellow, or blazing bicolor. The flowers of the genus are frequently referred to as sneezeweeds because their dried leaves were once used to manufacture snuff that was inhaled to trigger episodes of sneezing that were thought to purge the body of bad spirits. In the language of flowers, hyacinth represents tears.
Helianthus
We refer to the 55 recognized species of flowers in the genus Helianthus as sunflowers because of their propensity to “follow” the Sun’s rays as they move across the sky. This genus has both short and tall flowers. Large flowerheads with disc and ray florets are produced on thick, strong stalks by these plants. The blossoms might be red, maroon, mahogany, bronze, brown, yellow, orange, golden, or bicolor. Dwarf sunflowers represent affection, whereas big sunflowers represent haughtiness in the language of flowers.
Growing Notes
Acid soil essential: heather, and hydrangea if you want blue. Shade: hosta, hakone grass, hepatica, heartleaf bergenia. Dry sunny ground: harebell, hyssop, helichrysum, harlequin flower. Best scent: hyacinth and honeysuckle, both strongest in the evening or indoors.
Two need a light touch: hoya must not be deadheaded, since the same spur reflowers each year, and hollyhock should be planted where a three-metre spire has something to lean on.
Frequently Asked Questions
What flowers start with the letter H?
Twenty-eight are covered here, including hydrangea, hibiscus, hollyhock, honeysuckle, hyacinth, hosta, heather, hellebore, hypericum, hyssop, hepatica, hoya, honesty, helenium, helianthus, heliotrope, helichrysum, harebell, heart’s ease, hardy fuchsia, haemanthus, harlequin flower, hakone grass, hare’s tail grass, hare’s ear, heartleaf bergenia, heavenly bamboo and hyacinth bean.
How do I change hydrangea colour?
Only bigleaf hydrangeas change. Acid soil below about pH 6 makes aluminium available and the flowers turn blue; alkaline soil locks it away and they turn pink. White varieties cannot change, because they have no pigment to shift.
Are any flowers starting with H poisonous?
Several. Hellebore is toxic in all parts and its sap irritates skin. Hyacinth bulbs are toxic and cause contact dermatitis. Heavenly bamboo berries contain cyanogenic compounds and have killed flocks of birds. Heliotrope contains pyrrolizidine alkaloids, and raw hyacinth beans are toxic.
Why has my hoya stopped flowering?
Almost always because the old flower spurs were cut off. Hoyas flower from the same short spur year after year, so deadheading removes next year’s blooms. Leave them on, even when they look dead.
What is the difference between a harebell and a bluebell?
They are unrelated. The harebell is a campanula with thread-fine stems on dry grassland; the English bluebell is a woodland bulb. Confusingly, the harebell is called the bluebell in Scotland.
Which H flower is best for bees?
Heather and hyssop. Heather is a critical late-summer nectar source on upland moor, and hyssop is worked heavily through summer in dry sunny gardens.
Sources
Hydrangea aluminium availability and soil pH: horticultural research. Hellebore and hyacinth toxicity, and pyrrolizidine alkaloids in Heliotropium: standard toxicological plant references. Nandina berry cyanogenic content and cedar waxwing mortality: veterinary and ornithological literature. Heather honey thixotropy: apicultural literature.
This article is for general information. Never eat any flower, bulb or berry unless you are certain of its identification — several plants listed here are toxic.
