First Tree and Shrub Flowers

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	2024
	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	14.2
	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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