Dates of First Tree and Shrub Flowers

Species 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023
February
Corylus avellana 10.2   6.3   5.2 19.3 26.3 20.1 28.1 15.3 18.3 14.2   1.3 13.4 12.2   5.3   6.2   2.3 12.1 14.2 22.1 21.2 25.1   8.1
March
Alnus glutinosa 14.2 13.3 17.2 19.3   2.4   2.3   8.3 21.3 24.3 21.3   1.4 18.4 20.3 ? 18.3 ?   9.4 <21.4     2.3 25.2 13.3 ?
April
Larix kaempferi ? ? ? ? 15.5 17.4 ?   6.4 - 18.4 28.4 27.4 23.3 19.4 20.4 20.4 15.4 - 11.4 ? ? ?
Viscum album ? ? ? ? ? ? ?   3.4 15.4   9.4 13.4 23.4   7.4 13.5 12.4 ? 12.4 ? ? ? ? ?
Populus nigra ? 31.3   1.4 20.3 27.4 11.4 ? 10.4 25.4 ?   4.4 27.4   6.4 20.4   8.5 ? 14.4 19.4 ? ? ? ?
Prunus spinosa ? ? ? ? ? ? ? ? ? ? ? ?   7.4 26.4 23.4 19.4 19.4 19.4 10.4 20.4 ? ?
Fagus sylvatica   9.5   3.5   4.5 -   6.5 24.4 - 23.4   1.5 17.4 - 19.5 20.4 -   8.5 ? 25.4 - 20.4 ? ? ?
Larix decidua ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 20.4 ? ? ? ? ?
Salix caprea ? ? ? 19.3   2.4 22.2 25.2   3.4   6.4 20.3 22.3 18.4 14.3   7.4   2.4 27.3   9.4 20.3 18.3 23.3 23.3 <21.4
Salix cinerea   4.4   4.4 31.3 19.3 22.4   7.4 23.4 10.4 17.4   9.4   1.4 25.4   4.4 19.4 20.4 ? 19.4   7.4   6.4   9.4   9.4 21.4
Salix alba ? ?   9.5 28.4   9.5 25.4 ? 24.4   1.5 26.4 ?   3.5   2.5 22.4   7.5 ? 22.4 15.4 15.4 21.4 ? ?
Vaccinium myrtillus 20.4 22.4   4.5 26.4   7.5 12.4   4.5 21.4 30.4 15.4 22.4   7.5   4.4 19.4   2.5   8.4 20.4 10.4 12.4 23.4 ? ?
Betula pendula   7.4 15.4 23.4 28.4 28.4 17.4   6.5 12.4 25.4 15.4   5.4   3.5   4.4 19.4   4.5 ? 19.4 20.4 12.4 23.4 ? ?
Picea abies ? ? ? - 12.5 - - 19.5 ? 22.4 - -   2.5 10.5 13.5 ?   1.5 ? 25.4 ? ? ?
Populus tremula ? 28.3 14.3 19.3   6.4 27.2   8.3   4.4 17.4 24.3   5.4 18.4   5.4 21.4   7.5 ? 14.4 21.4 ? 26.4 ? ?
Pinus sylvestris ? ? ?   9.5 12.5 29.4 13.5 ? ? 26.4 ? ? ? ? ? ? ? ? ? ? ? ?
Betula pubescens ?   2.5 28.4 -   9.5 - 12.5 -   9.5 10.5 ? ? 11.4 ?   5.5 ? 29.4 ? ? 27.4 ? ?
Sambucus racemosa   7.5 28.4   4.5   2.5   9.5 17.4   7.5 28.4   2.5 20.4 30.4 15.5 12.4   9.5   7.5 11.5 22.4 22.4 24.4 20.5 28.4 ?
Salix aurita ? 20.4 23.4 19.4   2.5 14.4   1.5 20.4 25.4 17.4 21.4 29.4   9.4 23.4 28.4 ? 23.4 21.4 ? 28.4 ? ?
Cytisus scoparius 10.5   4.5   9.5 11.5 15.5 14.4   4.5   8.5 24.5 26.4   7.5 27.5 15.4   9.5 11.5 12.5 29.4 13.5 20.4   7.5 29.4 ?
Prunus avium 25.4 21.4 27.4 26.4   5.5 15.4   4.5 19.4 29.4 12.4 27.4   6.5   7.4 24.4   6.5 15.4 21.4 18.4 11.4 26.4 19.4 30.4
May
Prunus padus   9.5 30.4 11.5   3.5 11.5 25.4   9.5 26.4   9.5 20.4   3.5 12.5 21.4   7.5   9.5   9.5 28.4 29.4 22.4 10.5   1.5 ?
Pseudotsuga menziesii ? ? ? ? ?   6.5 ? 23.5 ? 24.4 - -   2.5 ? ? ? ? ? ? ? ? ?
Sorbus aucuparia 18.5 12.5 22.5 24.5 21.5   3.5 19.5 13.5 28.5   1.5 22.5   3.6 11.5 18.5 25.5 21.5   9.5 22.5   7.5   4.6 12.5 ?
Acer platanoides   3.5   1.5 23.4 28.4   9.5 19.4 - 21.4   5.5 19.4 29.4   6.5 16.5 19.4   2.5 ? 20.4 23.4 <8.5 13.5 ? ?
Fraxinus excelsior ? 10.5 12.5 -   9.5 25.4   7.5 -   8.5   3.5   7.5   9.5 14.5 28.4 ? ? 21.4 ? 24.4 14.5 ? ?
Juniperus communis ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 14.5 ? ? ? ?
Crataegus laevigata 19.5 20.5 20.5 23.5 23.5 27.4 19.5 16.5 25.5 29.4 13.5 28.5   1.5 12.5 15.5 17.5   6.5 11.5   1.5 24.5 18.5 ?
Viburnum opulus 26.5   3.6 11.6 13.6 16.6 20.5   3.6 31.5 12.6 22.5   1.6 19.6 29.5 10.6   9.6 30.5 24.5   3.6 27.5 13.6 18.5 ?
Genista anglica 25.4 22.4 25.4 30.4   9.5 17.4   6.5 27.4 28.4 15.4 30.4 11.5 18.4   4.5   7.5 22.5 27.4 20.4   7.5 19.5 ? ?
Malus sylvestris 11.5   7.5 15.5 19.5 15.5 25.4 11.5   8.5 27.5 24.4 13.5 28.5 30.4   9.5 ? ?   5.5 12.5   3.5 20.5 ? ?
Sorbus aria ? 22.5 29.5 - 29.5 11.5 - 22.5   1.6 11.5 ? ? 19.5 ?   5.6 ? <5.6 <12.6   20.5 ? ? ?
Crataegus monogyna 19.5 20.5 29.5 28.5 29.5 29.4 19.5 17.5   2.6   3.5 22.5 10.6   9.5 21.5 28.5 20.5   8.5 11.5   6.5   1.6 18.5 27.5
Acer pseudoplatanus ? ? ? ? 18.5 27.4 ? ? 15.5 25.4 ? ?   9.4 21.4 13.5 ?   2.5 ?   8.5 28.5 ? ?
Quercus robur 10.5   3.5   5.5 10.5   8.5 25.4 12.5   4.5   8.5 25.4   7.5 18.5 28.4 10.5 11.5 ? 26.4 - 23.4 31.5 ? ?
June
Vaccinium oxycoccos 19.5 15.5 17.5 21.5   1.6   5.5 19.5 20.5 15.5 10.5 24.5 13.6 18.5 25.5   4.6 11.6 17.5 31.5 18.5   1.6 ? ?
Aesculus hippocastanum 19.5 10.5 20.5 22.5 16.5 26.4 23.5 20.5 27.5 10.5 19.5 27.5 30.4 21.5 21.5 26.5 17.5 12.5   8.5   8.6 ? ?
Genista pilosa ? ? ? ? ? ? ? ? ? ? ? 11.6 ? ? ? ? ? ? ? ? ? ?
Ilex aquifolium ? ? ? ? 17.5   2.5 19.5 ? ?   2.5 ? 10.6   2.5 17.5 27.5 ? 17.5 25.5 29.5 13.6 ? ?
Frangula alnus   9.6   4.6 10.6 10.6 11.6 18.5   1.6   2.6 11.6   9.5 30.5 18.6 22.5 31.5   5.6 14.6 17.5 14.6   8.6 13.6 ? ?
Sambucus nigra 11.6   9.6 15.6 19.6 16.6 12.5   5.6   7.6 12.6 25.5 30.5 25.6   5.6 15.6   8.6   7.6 27.5 12.6   3.6 13.6 24.5 15.6
Vaccinium vitis-idaea 26.5 20.5 22.5 16.5 18.5   6.5 20.5 18.5   3.6   7.5 26.5 11.6 19.5 27.5   4.6 11.6 14.5 26.6 30.6 15.6 ? ?
Spiraea alba ?   9.6 ? ? ? ? ? ? ?   2.6 23.6 30.6 12.6 26.6 28.6 17.6 17.6 20.6 15.6 20.6 ? 17.6
Rosa canina ? ? 23.6 18.6 17.6   6.6 31.5   8.6 16.6 30.5 15.6 30.6   9.6 19.6 26.6 14.6   6.6 16.6   8.6 21.6   1.6 18.6
July
Erica tetralix 17.6 11.6 17.6 20.6 23.6   7.6 17.6 <24.6   25.6   6.6 28.6   4.7 15.6 18.6 29.6 11.6 16.6 26.6 11.6   6.7 ? ?
Castanea sativa ? ? ? ? 14.7   3.6 21.7 26.7 20.7 27.6 20.7 13.7 21.6   6.7 25.7   2.7   2.7   4.7 11.7 ? ? ?
Lonicera periclymenum 21.6   7.6 19.6 18.6 21.6   3.6 11.6 16.6 19.6   2.6 15.6   2.7 13.6 19.6 10.7 12.6 21.6 25.6 21.6 13.7 17.6 13.7
August
Calluna vulgaris 21.7   5.7 18.7 <1.8 26.7 17.7 22.7 22.7 16.7 24.6 21.7 30.7 26.7   4.7 27.7 22.7   6.8   7.8   1.8 ? ? ?

Translations

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