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
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
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
March
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
April
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
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 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 ?
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
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
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
May
Pseudotsuga menziesii ? ? ? ? ?   6.5 ? 23.5 ? 24.4 - -   2.5 ? ? ? ? ? ? ?
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
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
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 ? ?
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
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
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 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
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
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
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
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
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 ? ? ? ? ? ? ? ?
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
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
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
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
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
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
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
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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