| 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 | 86 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 3 |
| February | 1,409 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 269 (Very high) | 1 (Low) | 51 (High) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 25 (Medium) | 5 |
| March | 75 (Medium) | 2,061 (Very high) | 5 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 39 (Medium) | 24 (Medium) | 90 (High) | 69 (High) | 1 (Low) | 65 (High) | 2 (Low) | 6 (Low) | 72 (High) | 255 |
| April | 2 (Low) | 105 (High) | 26 (Low) | 42 (Medium) | 10 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 2 (Low) | 20 (Medium) | 1 (Low) | 1 (Low) | 238 (Very high) | 5 (Low) | 3 (Low) | 9 (Low) | 66 |
| May | 2 (Low) | 3 (Low) | 131 (High) | 26 (Medium) | 187 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 35 (Medium) | 0 (Low) | 10 (Low) | 191 (Very high) | 39 (Medium) | 1 (Low) | 7 (Low) | 71 |
| June | 3 (Low) | 0 (Low) | 280 (Very high) | 55 (High) | 129 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 23 (Medium) | 19 (Medium) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 243 (Very high) | 0 (Low) | 18 (Medium) | 110 (Very high) | 81 (High) | 0 (Low) | 10 (Low) | 53 |
| July | 1 (Low) | 0 (Low) | 96 (High) | 9 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 18 (Medium) | 0 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 21 (Medium) | 0 (Low) | 14 (Low) | 13 (Low) | 11 (Low) | 0 (Low) | 6 (Low) | 39 |
| August | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| September | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 26 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 18 (Medium) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 8 |
| October | 14 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 |
| November | 91 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 54 (High) | 0 (Low) | 1 (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) | 5 (Low) | 3 |
| December | 132 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 |