Barum's Winter Damage 2008 thru 2011

Introduction

Following the hard winter of 2008-2009, the RHS carried out a Hardiness Survey of plant damage.

However, the Winter 2009-2010 was even harder, so they repeated the survey.
Barum responded by adding a column to last year's table to show the effect over the two Winters.

In the interest of Undergardenership (the RHS cannot extend a survey for another year), an extra column has been added for the diabolical winter 2010 − 2011.

Key to the Table

The columns are as follows:

The Plant Table

Top of Page
A B-C D E F G-H I-L M N-P R S T-Z
Plant Name Damage 2008-09 Damage 2009-10 Damage 2010-11 Protection Age Comments
A Top of table
Abelia x grandiflora 'Gold Sport' 4 4 4 1 >10 -
Abelia floribunda 4 4 4 1 >10 -
Abutilon 'Kentish Belle' 3 3 2 2 >10 -
Abutilon 'Milleri' 4 3 2 3 9 -
Abutilon megapotamicum 'Variegatum' 3 2 2 2 >10 -
Acacia baileyana 'Purpurea' 3 2 1 1 >10 It may have recovered if we had not had such a diabolical Winter in 2010 - 2011.
Acacia dealbata 4 4 2 1 >10 New shoots from the trunk in 2011 − will it survive?
Acacia pravissima 4 4 1 6 Pot -
Acca sellowiana 4 4 3 2 5 -
Acer davidii 'George Forrest' 4 4 4 1 9 -
Acer griseum 4 4 4 1 >10 -
Acer negundo 'Flamingo' 4 4 4 1 >10 -
Acer palmatum 'Butterfly' 4 4 4 1 >10 -
Acer palmatum 4 4 4 1 >10 -
Acer palmatum dissectum 'Inaba-shidare' 3 4 3 2 Pot -
Acer palmatum dissectum 'Seiryu' 4 4 4 2 Pot -
Acer pseudoplatinus 'Brilliantissimum' 4 4 4 1 8 -
Acer shirasawanum 'Aureum' 4 4 4 1 >10 Planted in the ground in Sept 2009
Acer shirasawanum 'Autumn Moon' 4 4 4 2 Pot -
Acer tataricum subsp- ginnala 4 4 4 1 >10 -
Aeonium (Planted Group) 1 - 1 (cl) - 4 -
Aeonium urbicum 1 - 1 (cl) 1 4 -
Aeonium arborium 'Zwartkop' 4 4 4 7 Pot -
Aeonium 'Blushing Beauty' - 4 4 7 Pot -
Agapanthus campanulatus 'Patens' 3 3 3 4 7 -
Agapanthus praecox 3 1 - 1 Pot -
Agapanthus 'Snowy Owl' 2 3 2 5 Pot -
Agave americana 'Marginata' 3 3 3 6 Pot -
Agave americana 'Marginata' 1 - - 1 (cl) >10 -
Agave americana 'Mediopicta alba' 4 4 4 8 Pot -
Agave attenuata 1 - - 6 (fl) Pot -
Agave attenuata 4 4 4 8 Pot offsets rooted in 2008.
Agave filifera 3 3 3 6 (fl) Pot -
Agave parviflora 3 3 3 6 (fl) Pot -
Akebia quinata 4 4 4 1 >10 -
Albizia julibrissin 'Summer Chocolate' - 4 4 6 (fl) Pot -
Allium aflatunense 2 2 2 1 >10 -
Allium christophii 2 2 2 1 9 -
Allium globemaster 2 2 2 1 7 -
Allium karataviense 2 2 2 1 >10 -
Allium schubertii 2 2 2 1 3 -
Allium unifolium 2 2 2 1 5 -
Alocasia wentii 1 - - Pot -
Aloe ciliaris 2 3 3 1 (cl) 6 Amazing − protected from the wet, and it still grows.
Aloe ciliaris 2 3 3 6 (fl) Pot -
Amaryllis belladonna 2 2 2 1 >10 -
Arbutus unedo 3 3 3 1 >10 -
Astelia chatamica 'Silver Spear' 4 3 2.5 1 Pot -
Astelia nervosa 'Westland' 4 3 3 1 Pot -
Azara microphylla 'Variegata' 4 4 4 1 >10 -
Azara serrata 4 4 4 1 >10 -
B Top of table 
Baptisia australis 2 2 2 1 10 -
Beschorneria yuccoides 3 3 2 7 Pot -
Brugmansia suaveoloens 'Yellow Trumpet',Pink and Apricot forms 1 - - 6 -
Buddleja alternifolia 4 4 4 1 >10 -
Buddleja davidii 'Black Knight', 'Harlequin', 'Royal Red' 4 3 4 1 >10 -
Buddleja x weyeriana 4 4 1 1 >10 -
C Top of table
Calliandra selloi 4 1 - 1 -
Callistemon citrinus 'Splendens' 4 4 2 2 >10 Took all summer to recover - no flowers.
Callistemon floribundus 'Red Cluster' 2 1 - 1 -
Campsis tagliabuana 'Madam Galen' 4 3 4 1 >10 -
Canna 'Durban', 'Fatima Morgana', 'Florence Vaughan', 'Striata' 2 1 1 5 Very slow to grow in 2009. Replaced in 2010, all lost over Winter.
Canna 'Wyoming' 2 2 1 5 Pot Failed to flower in 2010.
Catalpa x erubescens 'Purpurea' 3 3 4 1 5 -
Cautleya spicata 'Robusta' 2 2 2 3 Pot -
Ceanothus arboreus 'Trewithen Blue' 3 3 3 1 >10 2 large boughs died and had to be removed. Doubt if it will make to 2012.
Ceanothus 'Puget Blue' 4 3 3 1 9 -
Ceratostigma willmottianum 4 4 2 1 8 Recovered and flowered well in 2011.
Ceratostigma plumbaginoides 4 2 2 1 3 -
Cercis canadensis 4 4 4 1 >10 -
Cestrum fasciculatum 'Newellii' 3 2 - 1 Recovery in 2010 was so poor we dug it up.
Cestrum roseum 'Ilnacullin' - 4 1 4 Pot -
Chamaecyparis lawsoniana 'Columnaris' 4 4 4 1 >10 -
Chamaerops humilis 'Cerifera' 1 - - 3 Pot -
Chamaerops humilis 'Argentia' 4 4 4 1 (cl) 5 Planted in the garden in 2008.
Chimonanthus praecox 4 4 4 1 10 -
Citrus limon 'Eureka' 4 4 2 6 (fl) >10 Took all Summer to recover - no fruit.
Clematis 4 4 4 1 >10 -
Clerodendron bungei 4 4 4 1 >10 -
Clerodendron tricotomum 3 3 3 1 >10 Started well in Spring, then started to lose leaf in June - May's drought blamed.
Clerodendron tricotomum 'Fargesii' 4 3 4 2 3 -
Clerodendron ugandense 1 - - 7 Pot -
Clerodendron ugandense - 4 3 7 Pot Cuttings taken before Winter of 2008-09
Clianthus puniceus - 4 1 4 Pot -
Colocasia esculanta 'Black Magic' 1 - - 7 Pot -
Colocasia gigantea 2 2 2 7 Pot -
Cornus alternifolia 'Argentea' 4 4 4 1 >10 -
Cornus sanguinea 'Winter Flame' 4 3 4 1 >10 -
Coronilla valentina var. glauca 'Variegata' 4 1 - 1 -
Correa 'Dusky Bells - 1 - 1 Never had a chance.
Correa 'Marians Marvel' 3 3 2 1 10 So mis-shapen it was dug up Spring 2011.
Corylopsis pauciflora 4 4 4 1 >10 -
Corylus avellana 'Contorta' 4 4 4 1 >10 -
Cotinus coggygria 4 4 4 1 >10 -
Crinodendron hookerianum 4 3 3 1 >10 -
Crinodendron patagua 3 2 2 1 >10 All new growth cut right back.
Cupressus macrocarpa 'GoldCrest' 4 4 4 1 >10 Felled in 2011
Cyclamen hederifolium 4 4 4 1 >10 -
Cyclamen coum 4 4 4 1 9 -
Cytisus battandieri 4 4 3 1 7 -
D Top of table
Dahlia 2 1 1 6 Replaced each spring, but lost the lot in the last two winters.
Daphne odora 4 4 4 1 8 -
Deutzia x hybrida 'Magicien', 'Mont Rose' 4 4 4 1 >10 -
Deutzia scabra 'Plena' 4 4 4 1 >10 -
Dichroa febrifuga 3 2 2 2 10 -
Dicksonia antarctica 3 1 - 1 (m) No overhead protection, and subject to North-West winds.
Dicksonia antarctica 4 4 1 2 (m) 6 Planted under a Prunus cerifera, sailed through the first 2 winters, then no sign of life in 2011 - leaving for 12 months - ever hopeful.
Digitalis ferruginea 2 2 2 1 9 -
Dregea sinensis 4 4 3 1 >10 -
Drimys lanceolata 4 4 4 2 >10 Planted in 2011
Dryopteris wallichiana 2 2 2 1 10 -
E Top of table
Echium pininana 1 1 1 1 n/a Have self-seeded since 2003. Seeds germinated in 2009, 2010 and 2011 - amazing.
Elaeagnus x ebbingei 'Gilt Edge' 4 4 3 1 >10 -
Enkianthus campanulatus 'Hiraethlyn' 4 4 4 1 >10 Planted in the ground in Sept 2009.
Ensete ventricosum 1 - - 7 Pot -
Ensete ventricosum 'Maurelii' 2 1 - 7 Pot Bought in 2008
Ensete ventricosum 'Maurelii' - - 4 8 Pot Bought in 2010, grew to 2m in 2011.
Eucalyptus gunnii 4 4 4 1 >10 -
F Top of table
Fargesia nitida 4 4 4 1 >10 -
Fascicularia bicolor 4 4 3 1 >10 -
Fascicularia pitcairnifolia 3 3 1 1 9 Badly affected by Jan 2010 snow, lifted and split into pots. All died in 2011.
Fremontodendron 'California Glory' 4 3 3 4 Pot -
Fremontodendron mexicanum'Tequila Sunrise' 4 3 1 3 Pot -
Freylinia lanceolata 3 3 1 2 5 -
Fuchsia magellanica 'Alba' 4 4 3 1 >10 -
Fuchsia microphylla 2 2 2 1 >10 -
Fuchsia 'Springtime' and others grown as half-hardy perennials. 3 3 3 1 >10 -
Furcraea selloa 'Marginata' 2 2 4 8 Pot -
G Top of table
Garrya elliptica 3 - - 1 So disfigured by wind scorch, it was dug up in Sept 2009.
Geranium guiseppe, himalayense 'Plenum', pratense 'Plenum Purpureum' 4 4 4 1 >10 -
Geranium maderense (in pot) 4 4 4 7 Pot -
Geranium palmatum, growing from self-seedlings 4 2 2 1 >10 -
Geum chiloense / montanum 'Mrs J Bradshaw' 4 4 4 1 >10 -
Grevillea juniperina - 4 4 2 2 -
Grevillea lanigera 'Compacta' 1 - - 1 -
Grevillea rosmarinifolia 4 3 4 1 8 -
Griselinia littoralis 'Variegata' 4 4 4 3 5 -
H Top of table
Hamamelis x intermedia 'Feuerzauber' 4 3 3 1 >10 -
Hamamelis mollis 4 4 4 1 >10 -
Hedychium densiflorum 'Assam Orange' 2 2 2 1 (m) >10 -
Hedychium 'Stephen' 2 2 2 6 4 -
Hedychium gardnerianum 2 2 2 1 9 -
Hedysarum multijugum - 1 - 2 -
Hibiscus syriacus 'Blue Bird', 'Hamabo', 'Lady Stanley', 'Red Heart' 4 4 4 2 >10 -
Hibiscus syriacus 'Comte de Flandres' and 'Woodbridge' growing together 4 3 4 1 >10 -
Humulus lupulus 'Golden Tassels' 2 2 2 3 5 -
Hydrangea macrophylla 3 3 3 1 >10 -
Hydrangea macrophylla 'Maculata' 3 3 3 2 >10 -
I Top of table
Ilex aquifolium 'J.C. van Tol' 4 4 - 1 Dug out in 2010 - shading other plants.
Iochroma australe 3 3 3 1 >10 -
Iochroma grandiflorum 3 1 - 7 -
Iochroma purpureum 3 2 3 7 8 -
Itea ilicifolia 4 4 4 1 >10 -
J Top of table
Jovellana violacea 4 4 4 1 >10 -
L Top of table
Lampranthus 'Yellow', 'Tresco Fire' 1 - - 3 -
Lampranthus 'Brownii, 'Tresco Fire', 'Yellow' - 1 - 6 Wrong year to replace them!
Lapageria rosea 1 - - 1 -
Leptospermum scoparium 'Red Damask' 1 - - 1 -
Leptospermum martinii 3 3 1 1 8 -
Lespedeza bicolor 'Summer Beauty' 3 3 3 2 3 -
Leycestria formosa 4 3 3 1 >10 -
Libertia ixioides 4 4 3 1 >10 -
Libertia ixioides 'Goldfinger' 4 4 4 1 3 -
Libertia peregrinans 4 4 4 1 8 -
Liquidambar styraciflua 4 4 3 1 >10 Developed some form of weeping canker in 2011.
Lobelia laxiflora var angustifolia 4 4 3 1 >10 -
Lomatia myricoides 4 4 1 1 5 -
Lonicera several varieties 4 4 4 1 >10 -
Lophomyrtus x ralphii 3 3 3 1 >10 -
Luma apiculata 'Glanleam Gold' 4 4 3 1 >10 -
M Top of table
Magnolia x soulangeana 'Susan' 4 4 - 1 Dug out in 2010, shading other plants.
Miscanthus sinensis 'Zebrinus' 4 4 3 1 >10 -
Musa basjoo 2 1 - 2 -
Myrtus communis 3 2 2 1 >10 -
N Top of table
Nandina domestica 4 4 3 1 >10 -
Nandina domestica 'Firepower' 4 4 3 1 >10 -
Neillia thibetica 4 3 3 2 >10 -
O Top of table
Olea europaea 3 4 2 1 >10 Cut to trunk, produced 60cm of growth in 2011
Osmanthus burkwoodii 4 4 4 1 >10 -
P Top of table
Phoenix canariensis 4 1 - 5 Produced a couple of leaves, but these turned brown.
Phormium cookianum 'Tricolor' 4 4 3 2 >10 -
Phormium tenax 'Purpurea' 3 2 3 1 >10 This clump was 60cm in radius with blades 2m long. It was cut to half in 2008-09 and reduced to about 6 plantlets after 2009-10. These have been dug up and potted.
Phormium 'Alison Blackman' 4 4 3 2 6 -
Phormium 'Apricot Queen' 3 3 2 1 8 -
Phormium 'Bronze Baby' 3 3 1 2 >10 -
Phormium 'Evening Glow' 4 4 3 2 >10 -
Phormium Flamingo 4 3 3 1 7 Virtually all the blades were flattened by snow.
Phormium 'Jack Spratt' 4 3 1 1 Pot -
Phormium 'Jester' 4 3 3 1 9 -
Phormium 'Maori Maiden' 3 3 - 1 Dug out in 2011
Phormium 'Pink Panther' 4 4 3 1 4 -
Phormium 'Platts Black' 3 3 1 2 5 Badly damaged by snow.
Phormium 'Sundowner' 4 1 - 2 Only a single plantlet survived in 2009, potted up to no avail.
Phormium 'Surfer' 4 3 1 3 Pot -
Phormium 'Yellow Wave' 4 4 3 1 8 -
Photinia davidiana 'Palette' 4 4 3 1 >10 -
Photinia davidiana 'Red Robin' 4 1 - 1 Slowly failed in dry cold spring of 2010.
Phyllostachys aureosulcata 'Aureocaulis' 4 4 4 1 10 -
Phyllostachys nigra 4 4 4 1 9 Recovered completely having been bent double by the weight of snow.
Pieris floribunda 'Forest Flame' 4 4 4 1 >10 -
Pieris floribunda 'Flaming Silver' 4 4 4 1 >10 -
Pileostegia viburnoides 4 4 4 3 >10 -
Pinus montezumae 4 4 3 1 >10 -
Pittosporum tenuifolium 'Irene Paterson' 4 4 - 1 >10 Dug out in 2010
Pittosporum tenuifolium 'Irene Paterson' - - 4 1 2 -
Pittosporum tenuifolium 'Tandara Gold' 4 3 3 2 6 -
Pittosporum tenuifolium 'Tom Thumb' 4 4 4 1 >10 -
Pittosporum tenuifolium 'Silver Queen' 4 4 3 1 >10 -
Pittosporum 'Garnettii' 4 4 3 1 6 -
Pleioblastus auricomus 4 4 4 1 10 -
Pleioblastus simonii 4 3 3 1 >10 -
Polygala x dalmaisiana - 1 - 2 -
Prostanthera cuneata 4 4 4 1 >10 -
Prunus cerasifera 'Pissardii' 4 4 4 1 >10 -
Punica granatum 4 4 4 1 >10 -
Punica granatum 'Nana' 3 3 3 1 >10 -
R Top of table
Rhamnus alaternus 'Argenteovariegata' 4 - - 1 Dug up in Sept 2009 - become too conjested.
Rhaphiolepis umbellata 3 3 3 1 >10 -
Romneya coulteri 3 2 3 2 >10 -
Rosa HT, shrub, climbers etc. 4 4 4 1 >10 -
Rosa Banksiae 'Lutea' 4 4 4 4 >10 -
Rosmarinus officinalis 'Primley Blue' 4 1 2 -
Rosmarinus officinalis 'Prostratus' 4 4 4 1 7 -
Ruscus 'John Redmond' 4 4 4 1 3 -
S Top of table
Salix matsudana 'Tortuosa' 4 4 4 1 >10 -
Salvia blepharophylla 3 3 2 2 >10 -
Salvia buchanii 4 3 1 2 >10 -
Salvia candelabrum 4 3 2 2 10 -
Salvia forsskaolii 4 3 3 2 >10 -
Salvia greggii 'Sungold' 1 - - 1 -
Salvia greggii Savanna Series - 'Salmon Rose' and 'Purple' 4 4 4 6 Pot -
Salvia guaranitica 2 1 - 2 It had grown to 2metres tall.
Salvia jamensis 'Raspberry Royale' 4 3 3 1 10 -
Salvia involucrata 'Bethellii' 3 2 2 2 >10 -
Salvia leucantha 3 2 1 3 Pot -
Salvia microphylla 4 3 3 2 >10 -
Salvia patens 'Cambridge Blue', 'Chilcombe', 'Guanajuato', 'White Trophy', 'Oxford Blue' 1 - - 1 -
Salvia 'Phyllis Fancy' 2 2 1 6 Pot -
Sarcococca hookeriana 4 4 4 3 >10 -
Sarcococca confusa 3 4 4 1 >10 -
Schisandra grandiflora var rubriflora 4 4 4 1 >10 -
Schisandra sphenanthera 4 4 4 1 >10 -
Solanum rantonnetii 1 - - 2 -
Sophora japonica 3 3 3 1 >10 -
Stipa arundinacea 4 4 4 1 >10 -
Strelitzia regina. 4 4 4 8 pot Seeds were sown in 2001.
Strelitzia regina. 4 1 - 6 That's what happens when a plant gets too big and heavy to hump indooors for winter!
Styrax japonica 4 3 3 2 Pot -
T Top of table
Tarchonanthus camphoratus 2 1 - 1 -
Trachelospermum jasminoides 'Variegatum' 4 4 3 3 >10 -
Trachelospermum jasminoides 'Major' 4 4 4 3 >10 -
Tulbaghia violacea 'Silver Lace' 4 4 4 1 7 -
V Top of table
Vestia foetida 1 - - 2 -
Vestia foetida - 3 2 2 2 Cuttings taken in 2008
Viburnum x bodnantense 'Dawn' 4 3 3 1 >10 -
W Top of table
Wisteria floribunda 4 4 4 1 >10 -
Wisteria sinensis 4 4 4 1 >10 -
Y Top of table
Yucca filamentosa 'Bright Edge' 4 4 3 1 4 -
Yucca filamentosa 'Variegata' 4 3 4 1 >10 Snow damage.
Yucca flaccida 'Golden Sword' 4 4 3 1 >10 -
Yucca gloriosa 'Variegata' 4 4 4 1 >10 -
Z Top of table
Zelkova serrata 'Goblin' 4 4 4 1 >10 -

 

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