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About Pollen in Bromley

Bromley in Bexley experiences significant spring tree pollen: Birch, peaking March/April from extensive urban parkland (e.g., High Elms Country Park) and street trees; Oak and Plane follow April/May, prevalent across suburban green spaces (e.g., Chislehurst Common). Summer brings peak grass pollen from late May through July, originating from abundant local meadows and maintained verges, particularly along River Ravensbourne corridors.

Bromley’s urban-green interface often concentrates airborne allergens; prevailing winds aid dispersal from surrounding Kent countryside. Late summer through autumn sees rising mould spore counts (August-October), exacerbated by damp conditions, leaf litter decomposition in parks, and increased indoor humidity.

HIGH

10 active species

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4-Day Forecast:

Morning

Grass LOW

Tree V.HI

Weed LOW

Afternoon

Grass LOW

Tree HIGH

Weed LOW

Evening

Grass LOW

Tree MED

Weed LOW

Species	Level	Count
🌳 English Oak	HIGH	63 grains/m³
🌳 Holm Oak	HIGH	56 grains/m³
🌳 London Plane	MED	49 grains/m³
🌳 White Oak	MED	38 grains/m³
🌳 Paper Birch	MED	28 grains/m³
+35 more tracked Downy Birch Perennial Ryegrass Ribwort Plantain Cock's-foot Common Sorrel Box Elder Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Silver Birch Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Ash Mountain Cedar White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Grass (mixed) Black Poplar Mesquite Russian Thistle Field Elm Stinging Nettle All species in the app: Android iOS
🌳 English Oak	HIGH	72 grains/m³
🌳 Holm Oak	HIGH	64 grains/m³
🌳 London Plane	HIGH	56 grains/m³
🌳 White Oak	MED	43 grains/m³
🌳 Paper Birch	MED	32 grains/m³
+35 more tracked Downy Birch Perennial Ryegrass Ribwort Plantain Cock's-foot Common Sorrel Grass (mixed) Box Elder Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Silver Birch Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Ash Mountain Cedar White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Black Poplar Mesquite Russian Thistle Field Elm Stinging Nettle All species in the app: Android iOS
🌳 English Oak	HIGH	62 grains/m³
🌳 Holm Oak	HIGH	56 grains/m³
🌳 London Plane	MED	48 grains/m³
🌳 White Oak	MED	37 grains/m³
🌳 Paper Birch	MED	27 grains/m³
+35 more tracked Downy Birch Perennial Ryegrass Ribwort Plantain Common Sorrel Cock's-foot Grass (mixed) Stinging Nettle Box Elder Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Silver Birch Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Ash Mountain Cedar White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Black Poplar Mesquite Russian Thistle Field Elm All species in the app: Android iOS
🌳 English Oak	MED	29 grains/m³
🌳 Holm Oak	MED	26 grains/m³
🌳 London Plane	MED	23 grains/m³
🌳 White Oak	MED	17 grains/m³
🌳 Paper Birch	MED	13 grains/m³
+35 more tracked Downy Birch Ribwort Plantain Perennial Ryegrass Common Sorrel Cock's-foot Pigweed Stinging Nettle Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Silver Birch Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Ash Mountain Cedar White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Grass (mixed) Black Poplar Mesquite Russian Thistle Field Elm All species in the app: Android iOS

Last updated: 14:02 UTC

4-Day Forecast	Tree	Grass	Weed
Wed 20 May	HIGH	LOW	LOW
Thu 21 May	HIGH	MED	LOW
Fri 22 May	HIGH	MED	MED
Sat 23 May	MED	LOW	MED

Map of Bromley (51.419559°, 0.096375°)

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What Pollen Levels Mean

LOW Symptoms are unlikely

MED Moderate risk of symptoms

HIGH Widespread symptoms likely

V.HI Expect significant symptoms

X.HI Extremely high symptom likelihood & severity