| 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 | 28 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 |
| February | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 |
| March | 19 (Low) | 103 (High) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 12 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 2 |
| April | 1 (Low) | 31 (Medium) | 6 (Low) | 3 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 1 (Low) | 9 (Low) | 0 (Low) | 2 (Low) | 19 (Medium) | 17 (Medium) | 1 (Low) | 21 (Medium) | 8 |
| May | 21 (Low) | 3 (Low) | 363 (Very high) | 73 (High) | 372 (High) | 1 (Low) | 27 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 170 (Very high) | 0 (Low) | 9 (Low) | 254 (Very high) | 65 (High) | 1 (Low) | 12 (Low) | 68 |
| June | 2 (Low) | 11 (Low) | 100 (High) | 14 (Low) | 216 (High) | 1 (Low) | 22 (Medium) | 0 (Low) | 0 (Low) | 31 (Medium) | 12 (Low) | 0 (Low) | 3 (Low) | 30 (Medium) | 0 (Low) | 5 (Low) | 0 (Low) | 12 (Low) | 6 (Low) | 9 (Low) | 27 (Medium) | 6 (Low) | 0 (Low) | 8 (Low) | 39 |
| July | 5 (Low) | 0 (Low) | 18 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 7 (Low) | 10 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 64 |
| August | 3 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 8 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 5 |
| September | 1 (Low) | 1 (Low) | 4 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 |
| October | 5 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 |
| November | 17 (Low) | 7 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 2 |
| December | 26 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 |