Hyacinth
Sources last read 14 September 2026.
Forgiving Among the more tolerant plants here.
Also called Common Hyacinth, Dutch Hyacinths and Garden Hyacinth.
Hyacinth is toxic
- Toxic to cats. Toxic principle: Narcissus like alkaloids. Clinical signs: Vomiting, diarrhea, dermatitis and allergic reactions. Bulbs contain highest amount of toxin. ASPCA
- Toxic to dogs. Toxic principle: Narcissus like alkaloids. Clinical signs: Vomiting, diarrhea, dermatitis and allergic reactions. Bulbs contain highest amount of toxin. ASPCA
- Toxic to people. Irritates skin; the bulbs are ornamental and should not be eaten. RHS
What the sources say about its care
- Light
- Full sun, Partial shadeRHS · read 13 September 2026
- Water
- Moist but well-drained or Well-drainedRHS · read 13 September 2026
- Humidity
No source read publishes a humidity figure for any plant on this site. What follows is general guidance for foliage plants.
ASHRAE recommends indoor relative humidity between 30% and 60% 30–60%Penn State Extension · read 13 September 2026- Temperature
How cold this tolerates, not what it prefers. No source read for this site publishes a preferred range for a plant indoors.
H4 — -10 to -5°C -10 to -5 °CRHS · read 13 September 2026- Soil
- Chalk, Clay, Loam, Sand; pH Acid or Alkaline or NeutralRHS · read 13 September 2026
- Toxic to cats
- ToxicASPCA · read 13 September 2026
- Toxic to dogs
- ToxicASPCA · read 13 September 2026
- Harmful to people
- Irritates skin; the bulbs are ornamental and should not be eaten.RHS · read 13 September 2026
How it usually goes wrong
- Flowering stops while the foliage carries on
The hyacinth looks well in every other respect: green, firm and growing. What is missing is the flowering.
Buds are formed only when the plant has energy to spare. Its source places it in full sun, partial shade, and in less light than that the surplus that pays for flowers is missing.
Telling it apart: The spacing of the newest leaves. Stretched growth means the light is short; normal spacing points at timing or feeding.
RHSDiagnose no flowers or dropped buds on this Hyacinth- Leaf tips go crisp and brown
The hyacinth browns at the very tips first, and the brown line creeps back along the edges over weeks. The tissue is dry and brittle, not soft.
Penn State Extension cites ASHRAE's recommended indoor range of 30% to 60% relative humidity; a heated room in winter drops below it. Air that dry pulls water from the leaf faster than the roots replace it, and the margins are furthest from the supply. That applies while it is grown indoors; its RHS rating of H4 describes a plant that also grows outside, where the air is seldom that dry.
Telling it apart: Whether it crumbles or smears. Crisp is water lost; soft and dark is cold or rot.
Penn State ExtensionHyacinth brown leaf tips and edges: causes- Lower leaves collapse and yellow within days of a watering
Colour goes before shape on a hyacinth. The lowest leaves on each stem yellow evenly, stay soft to the touch, and the compost two inches down is still wet from the last watering.
The source for this plant describes moist but well-drained or well-drained soil. Compost that stays saturated loses the air spaces fine roots grow into, and those roots die back first.
Telling it apart: Weigh the pot in your hand. A pot still heavy a week after watering is holding more water than the roots are using.
RHSHyacinth leaves turning yellow: causes- Pale dry areas across the upper leaves only
Scorched leaves on the hyacinth turn from pale to brown and brittle, and the damage stops where the shade of another leaf fell across it.
Nothing here disputes the full sun or partial shade its source names. The damage comes from the change: foliage formed in lower light is thin, and a sudden move into direct sun bleaches it faster than tougher growth can replace it.
Telling it apart: Whether it followed a move or a season. Scorch appears within days of a change in position.
RHSHyacinth leaves turning yellow: causes
Not sure which it is? Ask the diagnosis questions for Hyacinth.
Routine care
- Watering
- It is drought tolerant, but keep the soil moist right after planting so roots develop; water less after flowering as the bulbs move into dormancy.NC State Extension · read 13 September 2026
- Propagation
- Division is the recommended method; it also relieves overcrowding and stress on the existing plant.NC State Extension · read 13 September 2026Increase by division, taking off offsets during summer dormancy.RHS · read 13 September 2026
- Pruning
- Pruning is not needed; cut spent flower stems down to the base.RHS · read 13 September 2026
- Pests and diseases
- Can be troubled by bulb mites and narcissus bulb fly.NC State Extension · read 13 September 2026Snails and slugs can attack it. Disease risks: some virus diseases; hyacinth yellows; bacterial soft rot; and fungal infections such as sclerotinia diseases, blue mould rot and hyacinth fire.RHS · read 13 September 2026
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Photographs
About the plant
Hyacinthus orientalis, the common hyacinth, garden hyacinth or Dutch hyacinth, is a species of flowering plant in the family Asparagaceae, subfamily Scilloideae. It is native to western Asia, from southern Turkey, through Syria and Lebanon to northern Israel. It was introduced to Europe in the 16th century. It is widely cultivated everywhere in the temperate world for its strongly fragrant flowers which appear exceptionally early in the season, and frequently forced to flower at Christmas time.
From Wikipedia, CC BY-SA 4.0 · read 13 September 2026
- Native range
- S. Türkiye to N. IsraelWorld Checklist of Vascular Plants, June 2026 release, CC BY.Kew WCVP · read 13 September 2026Eurasia, Mediterranean, Southern TurkeyNC State Extension · read 13 September 2026Turkey to IsraelRHS · read 13 September 2026
- Climate
- temperateWorld Checklist of Vascular Plants, June 2026 release, CC BY.Kew WCVP · read 13 September 2026
- Growth form
- bulbous geophyteWorld Checklist of Vascular Plants, June 2026 release, CC BY.Kew WCVP · read 13 September 2026Bulb, Herbaceous Perennial; habit clumping, erectNC State Extension · read 13 September 2026Columnar upright (deciduous)RHS · read 13 September 2026
- Size
- Height 8–12 in; width 3–6 inNC State Extension · read 13 September 2026Height 0.1-0.5 metres; spread 0-0.1 metre after 1–2 yearsRHS · read 13 September 2026
- Flowering
- Flowers blue, gold/yellow, orange, pink, purple/lavender, red/burgundy, white; blooms in springNC State Extension · read 13 September 2026Flowers purple in springRHS · read 13 September 2026
- Uses
What sources record people using this plant for. A traditional or medicinal use listed here is a record of use, not advice to eat it or treat anything with it.
Toxic to peopleNC State Extension · read 13 September 2026
Common problems with Hyacinth
More of the Asparagaceae family
Asparagus fernBrown brittle margins with a green centre
Cast iron plantBlade tips go crisp and brown
DracaenaBrown tips on the newest blades first
Lucky bambooCrisp margins that appear in winter
Ponytail palmBlades hang and feel thin between the fingers
Snake plantBlades hang and feel thin between the fingers
Plants with similar care
Blue passion flowerA thin dry rim that crumbles between the fingers
Bush lilyDry, curled edges on leaves near a heater
Dog roseEdges of the leaves brown while the middle stays sound
English lavenderBuds form and fall before they open
Flaming KatyA thin dry rim that crumbles between the fingers
Hardy fuchsiaBrown, papery patches on the leaves nearest the glass
Sources
- ASPCA · read 13 September 2026
- Kew WCVP · read 13 September 2026
- NC State Extension · read 13 September 2026
- Penn State Extension · read 13 September 2026
- RHS · read 13 September 2026
- Wikipedia · read 13 September 2026
What this does not cover
The figures above are what published sources say, not measurements of the plant in your room. They say nothing about your pot size, your water, the season, or how far from the glass the plant stands, and those decide more than any figure here does.
Humidity has no species figure because no source read for this site publishes one, and the only temperature published for this plant is a cold floor. The simulator fills those gaps with general figures for its kind of plant, marked as general and listed on how we read sources. Where a toxicity row says the plant was not assessed, that is the absence of a finding and not a finding of safety.
If something is already wrong, the diagnosis tool asks about the soil, the window and the watering, which is where the answer usually is.