| 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) | 22 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 15 (Medium) | 0 (Low) | 5 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 0 |
| February | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 76 (High) | 0 (Low) | 281 (Very high) | 4 (Low) | 250 (Very high) | 1 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 | 0 |
| March | 11 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 4 (Low) | 1 (Low) | 9 (Low) | 68 (High) | 5 (Low) | 48 (Medium) | 80 (High) | 18 (Medium) | 6 (Low) | 9 (Low) | 22 (Medium) | 6 | 1 |
| April | 36 (Medium) | 6 (Low) | 12 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 10 (Low) | 44 (Medium) | 6 (Low) | 28 (Medium) | 2 (Low) | 187 (Very high) | 14 (Low) | 23 (Medium) | 29 (Medium) | 3 | 2 |
| May | 83 (High) | 490 (Very high) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 21 (Medium) | 1 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 101 (Very high) | 185 (Very high) | 805 (Very high) | 41 (Medium) | 1 (Low) | 17 (Medium) | 19 | 0 |
| June | 10 (Low) | 243 (High) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 97 (High) | 54 (High) | 76 (High) | 7 (Low) | 2 (Low) | 9 (Low) | 6 | 2 |
| July | 6 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 13 (Low) | 3 (Low) | 0 (Low) | 6 (Low) | 2 | 0 |
| August | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| September | 1 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 0 |
| October | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 1 | 2 |
| November | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 | 0 |
| December | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 16 (Medium) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 | 0 |