| 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 | 598 (Very high) | 0 (Low) | 45 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 31 (Medium) | 0 (Low) | 10 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 |
| February | 600 (Very high) | 0 (Low) | 51 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | — | 19 (Medium) | 0 (Low) | 41 (Medium) | 2 (Low) | 477 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 12 |
| March | 220 (Very high) | 2,013 (Very high) | 15 (Low) | 8 (Low) | 7 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | — | 1 (Low) | 37 (Medium) | 2 (Low) | 26 (Medium) | 2,440 (Very high) | 1 (Low) | 80 (High) | 4 (Low) | 57 (High) | 21 (Medium) | 74 |
| April | 24 (Low) | 247 (High) | 8 (Low) | 18 (Low) | 11 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | — | 0 (Low) | 26 (Medium) | 0 (Low) | 20 (Medium) | 12 (Low) | 3 (Low) | 205 (Very high) | 11 (Low) | 0 (Low) | 9 (Low) | 61 |
| May | 38 (Medium) | 1 (Low) | 86 (High) | 55 (High) | 275 (High) | 11 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 6 (Low) | — | 0 (Low) | 2 (Low) | 24 (Medium) | 182 (Very high) | 1 (Low) | 5 (Low) | 254 (Very high) | 19 (Medium) | 0 (Low) | 19 (Medium) | 52 |
| June | 35 (Medium) | 1 (Low) | 120 (High) | 72 (High) | 197 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 13 (Low) | 0 (Low) | 5 (Low) | — | 0 (Low) | 0 (Low) | 0 (Low) | 62 (High) | 1 (Low) | 6 (Low) | 22 (Medium) | 25 (Medium) | 0 (Low) | 21 (Medium) | 35 |
| July | 2 (Low) | 3 (Low) | 64 (Medium) | 9 (Low) | 5 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | — | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 6 (Low) | 5 (Low) | 4 (Low) | 0 (Low) | 4 (Low) | 20 |
| August | 2 (Low) | 0 (Low) | 7 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | — | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 18 (Medium) | 4 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 11 |
| September | 3 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | — | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 8 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 5 |
| October | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | — | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 7 |
| November | 126 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | — | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 25 |
| December | 1,041 (Very high) | 0 (Low) | 20 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | — | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 5 |