| Month | Plantain | Olive | Birch | Privet | Alder | Maple | Mugwort | Composites | Hazel | Heather | Eucalyptus | Ash | Mulberry | Elm | Pine | Poplar | Oak | Sorrel | Willow | Nettle | Other | Unidentified |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| January | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 21 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 27 (Medium) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |
| February | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 6 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 140 (Very high) | 0 (Low) | 487 (Very high) | 10 (Low) | 2,366 (Very high) | 3 (Low) | 0 (Low) | 1 (Low) | 27 (Medium) | 12 | 1 |
| March | 4 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 11 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 5 (Low) | 1 (Low) | 21 (Medium) | 97 (High) | 5 (Low) | 114 (Very high) | 327 (Very high) | 50 (High) | 7 (Low) | 26 (Medium) | 27 (Medium) | 40 | 2 |
| April | 49 (Medium) | 5 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 13 (Low) | 124 (Very high) | 2 (Low) | 58 (High) | 10 (Low) | 457 (Very high) | 9 (Low) | 8 (Low) | 16 (Medium) | 17 | 4 |
| May | 112 (Very high) | 637 (Very high) | 3 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 8 (Low) | 0 (Low) | 30 (Medium) | 2 (Low) | 0 (Low) | 11 (Low) | 1 (Low) | 488 (Very high) | 1 (Low) | 2,127 (Very high) | 58 (High) | 5 (Low) | 25 (Medium) | 20 | 3 |
| June | 16 (Low) | 222 (High) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 160 (Very high) | 1 (Low) | 107 (Very high) | 14 (Low) | 1 (Low) | 13 (Low) | 22 | 3 |
| July | 15 (Low) | 5 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 7 (Low) | 3 (Low) | 0 (Low) | 17 (Medium) | 23 | 4 |
| August | 6 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 7 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 10 | 3 |
| September | 3 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 19 (Medium) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 5 | 2 |
| October | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 51 (High) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 3 | 1 |
| November | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 36 (Medium) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 1 | 1 |
| December | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 21 (Medium) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 21 (Medium) | 2 | 2 |