Disease · 47 plants in our database
Honey fungus
Armillaria
Which plants
Where you will find it.
Signs and protection differ by plant — the exact steps are on each plant’s page.
Atlas cedarCedrus atlanticaMushrooms in late summer and autumn; mycelium in the soil all yearDieback of branches or the whole plant, smaller pale leaves. Under the bark at the root collar, white spongy tissue with a mushroom smell. Honey-coloured clusters of toadstools in autumn.
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Bay laurelLaurus nobilisSummer – autumnRotting roots, white mycelium under the bark, black bootlaces (rhizomorphs) in the soil, sudden death; mushrooms in autumn.
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BlackberryRubus fruticosus agg.The plant wilts, white mycelium under the bark of the crown.
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BluebeardCaryopteris × clandonensisMushrooms in late summer and autumn; mycelium in the soil all yearRoot rot and dieback of the shrub; white fungal sheets under the bark at the base.
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Border forsythiaForsythia × intermediaMushrooms in late summer and autumn; mycelium in the soil all yearRoot rot and dieback of the shrub; white fungal sheets under the bark at the base.
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Boston ivyParthenocissus tricuspidataSummer – autumnRotting roots, white mycelium under the bark, black bootlaces (rhizomorphs) in the soil, sudden death; mushrooms in autumn.
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Butterfly bushBuddleja davidiiSummer – autumnRotting roots, white mycelium under the bark, black bootlaces (rhizomorphs) in the soil, sudden death; mushrooms in autumn.
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Common hawthornCrataegus monogynaSummer – autumnDieback of branches or the whole plant, smaller pale leaves. Under the bark at the root collar, white spongy tissue with a mushroom smell. Honey-coloured clusters of toadstools in autumn.
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Common oliveOlea europaeaSummer – autumnRotting roots, white mycelium under the bark, black bootlaces (rhizomorphs) in the soil, sudden death; mushrooms in autumn.
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Common privetLigustrum vulgareMushrooms in late summer and autumn; mycelium in the soil all yearRoot rot and dieback of the shrub; white fungal sheets under the bark at the base.
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CranberryVaccinium macrocarponSummer – autumnRotting roots, white mycelium under the bark, black bootlaces (rhizomorphs) in the soil, sudden death; mushrooms in autumn.
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Deodar cedarCedrus deodaraMushrooms in late summer and autumn; mycelium in the soil all yearDieback of branches or the whole plant, smaller pale leaves. Under the bark at the root collar, white spongy tissue with a mushroom smell. Honey-coloured clusters of toadstools in autumn.
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Douglas firPseudotsuga menziesiiMushrooms in late summer and autumn; mycelium in the soil all yearThe crown dies suddenly or gradually; honey-brown mushrooms at the base of the trunk, white fungal mats between bark and wood with a mushroomy smell.
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ElderSambucus nigraMushrooms in late summer and autumn; mycelium in the soil all yearRoot rot and dieback of the shrub; white fungal sheets under the bark at the base.
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English lavenderLavandula angustifoliaSummer – autumnRotting roots, white mycelium under the bark, black bootlaces (rhizomorphs) in the soil, sudden death; mushrooms in autumn.
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English oakQuercus roburMushrooms in late summer and autumn; mycelium in the soil all yearThe crown dies suddenly or gradually; honey-brown mushrooms at the base of the trunk, white fungal mats between bark and wood with a mushroomy smell.
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Fraser photiniaPhotinia × fraseriSummer – autumnRotting roots, white mycelium under the bark, black bootlaces (rhizomorphs) in the soil, sudden death; mushrooms in autumn.
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Hardy kiwiActinidia argutaSummer – autumnRotting roots, white mycelium under the bark, black bootlaces (rhizomorphs) in the soil, sudden death; mushrooms in autumn.
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Hardy plumbagoCeratostigma plumbaginoidesRoot and crown rot, the plant dies back.
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HoneyberryLonicera caerulea var. kamtschaticaThe plant wilts, white mycelium under the bark of the crown.
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Japanese spireaSpiraea japonicaMushrooms in late summer and autumn; mycelium in the soil all yearRoot rot and dieback of the shrub; white fungal sheets under the bark at the base.
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KiwifruitActinidia deliciosaThe plant wilts, white mycelium under the bark of the crown.
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Kobushi magnoliaMagnolia kobusSummer – autumnDieback of branches or the whole plant, smaller pale leaves. Under the bark at the root collar, white spongy tissue with a mushroom smell. Honey-coloured clusters of toadstools in autumn.
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Large-flowered clematisClematis (Large-flowered Hybrids)Summer – autumnRotting roots, white mycelium under the bark, black bootlaces (rhizomorphs) in the soil, sudden death; mushrooms in autumn.
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LavandinLavandula × intermediaRotting roots, white mycelium under the bark, black bootlaces (rhizomorphs) in the soil, sudden death; mushrooms in autumn.
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Leyland cypress× Cuprocyparis leylandiiSummer – autumnDieback of branches or the whole plant, smaller pale leaves. Under the bark at the root collar, white spongy tissue with a mushroom smell. Honey-coloured clusters of toadstools in autumn.
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LingonberryVaccinium vitis-idaeaSummer – autumnRotting roots, white mycelium under the bark, black bootlaces (rhizomorphs) in the soil, sudden death; mushrooms in autumn.
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Midland hawthornCrataegus laevigataSummer – autumnDieback of branches or the whole plant, smaller pale leaves. Under the bark at the root collar, white spongy tissue with a mushroom smell. Honey-coloured clusters of toadstools in autumn.
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Nordmann firAbies nordmannianaMushrooms in late summer and autumn; mycelium in the soil all yearDieback of branches or the whole plant, smaller pale leaves. Under the bark at the root collar, white spongy tissue with a mushroom smell. Honey-coloured clusters of toadstools in autumn.
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Panicle hydrangeaHydrangea paniculataDecline of the shrub, especially under drought stress.
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PeachPrunus persicaThe plant wilts, white mycelium under the bark of the crown.
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Red-barked dogwoodCornus albaMushrooms in late summer and autumn; mycelium in the soil all yearRoot rot and dieback of the shrub; white fungal sheets under the bark at the base.
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Rose of SharonHibiscus syriacusMushrooms in late summer and autumn; mycelium in the soil all yearRoot rot and dieback of the shrub; white fungal sheets under the bark at the base.
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Russian sagePerovskia atriplicifoliaThe plant wilts, white mycelium under the bark of the crown.
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Saucer magnoliaMagnolia × soulangeanaSummer – autumnDieback of branches or the whole plant, smaller pale leaves. Under the bark at the root collar, white spongy tissue with a mushroom smell. Honey-coloured clusters of toadstools in autumn.
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Shrubby cinquefoilDasiphora fruticosaMushrooms in late summer and autumn; mycelium in the soil all yearMay be susceptible (infection not confirmed). Root rot and dieback of the shrub; white fungal sheets under the bark at the base.
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Silver birchBetula pendulaSummer – autumnDieback of branches or the whole plant, smaller pale leaves. Under the bark at the root collar, white spongy tissue with a mushroom smell. Honey-coloured clusters of toadstools in autumn.
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Slender pride of RochesterDeutzia gracilisMushrooms in late summer and autumn; mycelium in the soil all year'Nikko' may be susceptible to honey fungus (infection not confirmed). Root rot, shrub dieback; white fungal sheets under the bark.
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Smoke bushCotinus coggygriaMushrooms in late summer and autumn; mycelium in the soil all yearRoot rot and dieback of the shrub; white fungal sheets under the bark at the base.
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Spiked speedwellVeronica spicataRotting roots, white mycelium under the bark, black bootlaces (rhizomorphs) in the soil, sudden death; mushrooms in autumn.
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Star magnoliaMagnolia stellataMushrooms in late summer and autumn; mycelium in the soil all yearRoot rot and dieback of the shrub; white fungal sheets under the bark at the base.
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TarragonArtemisia dracunculusSummer – autumnRotting roots, white mycelium under the bark, black bootlaces (rhizomorphs) in the soil, sudden death; mushrooms in autumn.
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Voss's laburnumLaburnum × watereriSummer – autumnDieback of branches or the whole plant, smaller pale leaves. Under the bark at the root collar, white spongy tissue with a mushroom smell. Honey-coloured clusters of toadstools in autumn.
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WeigelaWeigela floridaMushrooms in late summer and autumn; mycelium in the soil all yearRoot rot and dieback of the shrub; white fungal sheets under the bark at the base.
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West Himalayan birchBetula utilis subsp. jacquemontiiSummer – autumnDieback of branches or the whole plant, smaller pale leaves. Under the bark at the root collar, white spongy tissue with a mushroom smell. Honey-coloured clusters of toadstools in autumn.
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White firAbies concolorMushrooms in late summer and autumn; mycelium in the soil all yearDieback of branches or the whole plant, smaller pale leaves. Under the bark at the root collar, white spongy tissue with a mushroom smell. Honey-coloured clusters of toadstools in autumn.
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White mulberryMorus albaSummer – autumnRotting roots, white mycelium under the bark, black bootlaces (rhizomorphs) in the soil, sudden death; mushrooms in autumn.
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