| 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) | 65 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 34 (Medium) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 2 |
| February | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 23 (Medium) | 8 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 118 (Very high) | 1 (Low) | 935 (Very high) | 2 (Low) | 724 (Very high) | 2 (Low) | 1 (Low) | 3 (Low) | 38 (Medium) | 14 | 2 |
| March | 9 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 38 (Medium) | 0 (Low) | 1 (Low) | 1 (Low) | 8 (Low) | 0 (Low) | 19 (Medium) | 179 (Very high) | 9 (Low) | 93 (High) | 112 (Very high) | 32 (Medium) | 9 (Low) | 7 (Low) | 24 (Medium) | 31 | 4 |
| April | 74 (High) | 11 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 8 (Low) | 160 (Very high) | 8 (Low) | 67 (High) | 9 (Low) | 484 (Very high) | 16 (Medium) | 9 (Low) | 28 (Medium) | 19 | 6 |
| May | 169 (Very high) | 1,084 (Very high) | 3 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 31 (Medium) | 1 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 181 (Very high) | 0 (Low) | 1,343 (Very high) | 71 (High) | 3 (Low) | 26 (Medium) | 25 | 10 |
| June | 18 (Low) | 334 (High) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 10 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 178 (Very high) | 0 (Low) | 146 (Very high) | 14 (Low) | 0 (Low) | 12 (Low) | 16 | 6 |
| July | 16 (Low) | 6 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 13 (Low) | 3 (Low) | 0 (Low) | 9 (Low) | 30 | 5 |
| August | 5 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 27 | 2 |
| September | 2 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 14 | 3 |
| October | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 44 (Medium) | 0 (Low) | 5 (Low) | 2 (Low) | 0 (Low) | 8 (Low) | 3 | 2 |
| November | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 8 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 2 | 3 |
| December | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 33 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 1 | 1 |