| Month | Plantain | Olive | Birch | Privet | Alder | Maple | Mugwort | Composites | Hazel | Heather | Eucalyptus | Ash | Mulberry | Elm | Pine | Poplar | Oak | Sorrel | Willow | Nettle | Other | Unidentified |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| January | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| February | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 54 (High) | 0 (Low) | 169 (Very high) | 3 (Low) | 44 (Medium) | 2 (Low) | 0 (Low) | 2 (Low) | 23 (Medium) | 2 | 4 |
| March | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 2 (Low) | 24 (Medium) | 1 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 9 (Low) | 10 (Low) | 35 (Medium) | 50 (High) | 117 (Very high) | 38 (Medium) | 1 (Low) | 2 (Low) | 14 (Low) | 9 | 6 |
| April | 36 (Medium) | 2 (Low) | 8 (Low) | 0 (Low) | 1 (Low) | 13 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 133 (Very high) | 4 (Low) | 51 (High) | 30 (Medium) | 284 (Very high) | 6 (Low) | 7 (Low) | 43 (Medium) | 14 | 3 |
| May | 147 (Very high) | 361 (High) | 28 (Medium) | 1 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 21 (Medium) | 0 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | 97 (High) | 1 (Low) | 342 (Very high) | 1 (Low) | 1,687 (Very high) | 38 (Medium) | 5 (Low) | 35 (Medium) | 77 | 7 |
| June | 27 (Medium) | 102 (Medium) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 0 (Low) | 10 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 102 (Very high) | 0 (Low) | 213 (Very high) | 6 (Low) | 0 (Low) | 10 (Low) | 32 | 6 |
| July | 9 (Low) | 7 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 14 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 0 (Low) | 71 (High) | 2 (Low) | 0 (Low) | 15 (Medium) | 345 | 2 |
| August | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 73 | 1 |
| September | 3 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 5 | 2 |
| October | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 | 1 |
| November | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 | 1 |
| December | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 1 | 5 |