| Month | Cypress/Yew | London Plane | Grasses | Plantain | Olive | Birch | Privet | Alder | Mugwort | Chestnut | Composites | Hazel | Heather | Ash | Mulberry | Elm | Pine | Poplar | Goosefoot/Amaranth | Oak | Sorrel | Willow | Nettle | Unidentified |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| January | 197 (High) | 0 (Low) | 17 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 33 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 8 |
| February | 191 (High) | 0 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 16 (Medium) | 0 (Low) | 104 (Very high) | 1 (Low) | 61 (High) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 19 (Medium) | 12 |
| March | 51 (Medium) | 3,151 (Very high) | 11 (Low) | 19 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 42 (Medium) | 25 (Medium) | 124 (Very high) | 79 (High) | 0 (Low) | 14 (Low) | 2 (Low) | 21 (Medium) | 20 (Medium) | 69 |
| April | 9 (Low) | 587 (Very high) | 18 (Low) | 3 (Low) | 10 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 10 (Low) | 7 (Low) | 0 (Low) | 354 (Very high) | 8 (Low) | 16 (Medium) | 11 (Low) | 2 (Low) | 108 (Very high) | 3 (Low) | 12 (Low) | 5 (Low) | 28 |
| May | 3 (Low) | 9 (Low) | 46 (Medium) | 16 (Low) | 205 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 38 (Medium) | 1 (Low) | 12 (Low) | 104 (Very high) | 10 (Low) | 5 (Low) | 11 (Low) | 99 |
| June | 1 (Low) | 0 (Low) | 27 (Low) | 5 (Low) | 94 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 77 (High) | 0 (Low) | 18 (Medium) | 35 (Medium) | 2 (Low) | 0 (Low) | 7 (Low) | 34 |
| July | 1 (Low) | 2 (Low) | 5 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 13 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 15 |
| August | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| September | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 18 (Medium) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 9 |
| October | 10 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 9 |
| November | 15 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 3 |
| December | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 |