| 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| February | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| March | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| April | 15 (Low) | 243 (High) | 15 (Low) | 19 (Low) | 5 (Low) | 14 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 29 (Medium) | 0 (Low) | 15 (Medium) | 7 (Low) | 3 (Low) | 616 (Very high) | 22 (Medium) | 11 (Low) | 31 (Medium) | 33 |
| May | 38 (Medium) | 3 (Low) | 363 (Very high) | 38 (Medium) | 253 (High) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 8 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 41 (Medium) | 0 (Low) | 5 (Low) | 265 (Very high) | 24 (Medium) | 1 (Low) | 13 (Low) | 44 |
| June | 15 (Low) | 4 (Low) | 265 (Very high) | 32 (Medium) | 192 (Medium) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 35 (Medium) | 14 (Low) | 0 (Low) | 7 (Low) | 15 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 97 (High) | 1 (Low) | 5 (Low) | 120 (Very high) | 22 (Medium) | 0 (Low) | 13 (Low) | 34 |
| July | 4 (Low) | 2 (Low) | 45 (Medium) | 3 (Low) | 5 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 10 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 14 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 14 (Low) | 10 (Low) | 3 (Low) | 0 (Low) | 8 (Low) | 77 |
| August | 1 (Low) | 1 (Low) | 5 (Low) | 3 (Low) | 5 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 8 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 29 |
| September | 1 (Low) | 3 (Low) | 4 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 16 (Medium) | 3 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 12 |
| October | 11 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 |
| November | 24 (Low) | 3 (Low) | 5 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 |
| December | 92 (High) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 2 |