| 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 | 0 (Low) | 0 (Low) | 26 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1,149 |
| February | 0 (Low) | 0 (Low) | 19 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 577 |
| March | 13 (Low) | 158 (High) | 21 (Low) | 7 (Low) | 0 (Low) | 56 (High) | 0 (Low) | 0 (Low) | 22 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 16 (Medium) | 12 (Low) | 20 (Medium) | 29 (Medium) | 106 (Very high) | 2 (Low) | 17 (Medium) | 7 (Low) | 0 (Low) | 34 (Medium) | 527 |
| April | 11 (Low) | 6 (Low) | 20 (Low) | 15 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 6 (Low) | 43 (Medium) | 3 (Low) | 16 (Medium) | 4 (Low) | 0 (Low) | 196 (Very high) | 5 (Low) | 0 (Low) | 6 (Low) | 47 |
| May | 30 (Medium) | 0 (Low) | 92 (High) | 39 (Medium) | 284 (High) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 44 (Medium) | 0 (Low) | 21 (Medium) | 185 (Very high) | 15 (Medium) | 0 (Low) | 7 (Low) | 184 |
| June | 13 (Low) | 0 (Low) | 48 (Medium) | 54 (High) | 254 (High) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 26 (Medium) | 0 (Low) | 8 (Low) | 8 (Low) | 8 (Low) | 0 (Low) | 15 (Medium) | 61 |
| July | 5 (Low) | 0 (Low) | 25 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 42 |
| August | 1 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 21 |
| September | 1 (Low) | 0 (Low) | 3 (Low) | 2 (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) | 1 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 8 |
| October | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 3 |
| November | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 5 |
| December | 338 (Very high) | 0 (Low) | 4 (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) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 |