| Month | Cypress/Yew | London Plane | Grasses | Plantain | Olive | Birch | Privet | Alder | Mugwort | Chestnut | Composites | Hazel | Heather | Eucalyptus | Ash | Mulberry | Elm | Pine | Poplar | Goosefoot/Amaranth | Oak | Sorrel | Willow | Nettle | Unidentified |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| January | 97 (High) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 |
| February | 201 (Very high) | 0 (Low) | 20 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 86 (High) | 0 (Low) | 49 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 3 |
| March | 112 (High) | 194 (High) | 12 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 7 (Low) | 3 (Low) | 18 (Medium) | 2 (Low) | 453 (Very high) | 1 (Low) | 26 (Medium) | 3 (Low) | 7 (Low) | 32 (Medium) | 142 |
| April | 8 (Low) | 3,388 (Very high) | 29 (Low) | 38 (Medium) | 6 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 58 (High) | 2 (Low) | 8 (Low) | 19 (Medium) | 2 (Low) | 139 (Very high) | 10 (Low) | 9 (Low) | 21 (Medium) | 792 |
| May | 2 (Low) | 20 (Low) | 260 (Very high) | 33 (Medium) | 97 (Medium) | 2 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 67 (High) | 0 (Low) | 3 (Low) | 286 (Very high) | 24 (Medium) | 4 (Low) | 9 (Low) | 82 |
| June | 2 (Low) | 12 (Low) | 32 (Medium) | 3 (Low) | 28 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 15 (Medium) | 1 (Low) | 4 (Low) | 18 (Medium) | 2 (Low) | 0 (Low) | 7 (Low) | 10 |
| July | 2 (Low) | 0 (Low) | 12 (Low) | 8 (Low) | 3 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 3 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 7 |
| August | 1 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 3 |
| September | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 |
| October | 33 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 |
| November | 11 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 |
| December | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 |