| 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 | 974 (Very high) | 0 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 35 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 168 (Very high) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 1 | 3 |
| February | 888 (Very high) | 0 (Low) | 18 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 31 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 257 (Very high) | 0 (Low) | 35 (Medium) | 1 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 18 (Medium) | 5 | 3 |
| March | 366 (Very high) | 3 (Low) | 11 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 19 (Medium) | 0 (Low) | 19 (Medium) | 7 (Low) | 50 (High) | 0 (Low) | 8 (Low) | 6 (Low) | 16 (Medium) | 23 (Medium) | 5 | 5 |
| April | 13 (Low) | 977 (Very high) | 15 (Low) | 31 (Medium) | 2 (Low) | 11 (Low) | 0 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 7 (Low) | 14 (Low) | 1 (Low) | 15 (Medium) | 44 (Medium) | 3 (Low) | 115 (Very high) | 12 (Low) | 28 (Medium) | 31 (Medium) | 16 | 13 |
| May | 18 (Low) | 71 (Medium) | 325 (Very high) | 90 (High) | 65 (Medium) | 7 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 10 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 126 (Very high) | 1 (Low) | 2 (Low) | 622 (Very high) | 46 (Medium) | 73 (High) | 9 (Low) | 32 | 25 |
| June | 94 (High) | 36 (Medium) | 407 (Very high) | 37 (Medium) | 377 (High) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 16 (Medium) | 0 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 565 (Very high) | 0 (Low) | 4 (Low) | 127 (Very high) | 35 (Medium) | 2 (Low) | 17 (Medium) | 38 | 38 |
| July | 78 (Medium) | 4 (Low) | 129 (High) | 8 (Low) | 55 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 10 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 102 (Very high) | 0 (Low) | 13 (Low) | 14 (Low) | 9 (Low) | 1 (Low) | 21 (Medium) | 14 | 15 |
| August | 2 (Low) | 2 (Low) | 10 (Low) | 2 (Low) | 7 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 12 (Low) | 4 (Low) | 2 (Low) | 2 (Low) | 8 (Low) | 6 | 7 |
| September | 8 (Low) | 9 (Low) | 9 (Low) | 2 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 20 (Medium) | 4 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 4 | 8 |
| October | 42 (Medium) | 1 (Low) | 3 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 2 | 4 |
| November | 4 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 | 5 |
| December | 27 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 | 2 |