| Month | Cypress/Yew | London Plane | Grasses | Plantain | Olive | Birch | Privet | Alder | Maple | Mugwort | Chestnut | Composites | Hazel | Heather | Eucalyptus | Ash | Mulberry | Elm | Pine | Poplar | Goosefoot/Amaranth | Oak | Sorrel | Willow | Nettle | Other | Unidentified |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| January | 148 (High) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 54 (High) | 0 (Low) | 3 (Low) | 5 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 | 0 |
| February | 251 (Very high) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 50 (High) | 1 (Low) | 81 (High) | 0 (Low) | 5 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 | 0 |
| March | 111 (High) | 3,115 (Very high) | 13 (Low) | 9 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 10 (Low) | 109 (Very high) | 31 (Medium) | 26 (Medium) | 244 (Very high) | 1 (Low) | 69 (High) | 9 (Low) | 1 (Low) | 49 (Medium) | 11 | 0 |
| April | 18 (Low) | 768 (Very high) | 70 (Medium) | 44 (Medium) | 317 (High) | 15 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 24 (Medium) | 0 (Low) | 3 (Low) | 118 (Very high) | 2 (Low) | 150 (Very high) | 14 (Low) | 1 (Low) | 1,290 (Very high) | 19 (Medium) | 8 (Low) | 24 (Medium) | 4 | 3 |
| May | 22 (Low) | 16 (Low) | 96 (High) | 22 (Medium) | 1,108 (Very high) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 1 (Low) | 10 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 312 (Very high) | 0 (Low) | 4 (Low) | 540 (Very high) | 10 (Low) | 0 (Low) | 6 (Low) | 5 | 0 |
| June | 6 (Low) | 1 (Low) | 58 (Medium) | 91 (High) | 5 (Low) | 3 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 14 (Low) | 1 (Low) | 5 (Low) | 21 (Medium) | 6 (Low) | 0 (Low) | 7 (Low) | 2 | 0 |
| July | 1 (Low) | 2 (Low) | 41 (Medium) | 22 (Medium) | 3 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 14 (Low) | 46 (Medium) | 8 (Low) | 0 (Low) | 3 (Low) | 1 | 0 |
| August | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 2 (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) | 2 (Low) | 0 (Low) | 17 (Medium) | 14 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 | 0 |
| September | 1 (Low) | 6 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 | 0 |
| October | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (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) | 0 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 0 |
| November | 596 (Very high) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 | 0 |
| December | 188 (High) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 | 0 |