OPALS - Ogren Plant Allergy Scale
Plants with a very low potential to cause allergic reactions (1 to 3 rating)
Balkan Clary 'Caradonna'
Salvia nemorosa 'Caradonna'
Banksia Rose
Rosa banksiae
Bearded Iris
Iris × germanica
Bugle 'Catlin's Giant'
Ajuga reptans 'Catlin's Giant'
Catmint 'Six Hills Giant'
Nepeta 'Six Hills Giant'
Choisya 'Aztec Pearl'
Choisya × dewitteana 'Aztec Pearl'
Cranesbill 'Orion'
Geranium 'Orion'
Dusky Cranesbill 'Lily Lovell'
Geranium phaeum 'Lily Lovell'
Echeveria
Echeveria spp.
False Indigo
Baptisia australis
Feather Reed Grass 'Overdam'
Calamagrostis × acutiflora 'Overdam'
Fir
Abies spp.
Golden Oats
Stipa gigantea
Helen's Flower
Helenium 'Sahin's Early Flowerer'
Hosta
Hosta spp.
Japanese Snowball 'Mariesii'
Viburnum plicatum f. tomentosum 'Mariesii'
Jerusalem Sage
Phlomis italica
Lamb's Ear 'Silver Carpet'
Stachys byzantina 'Silver Carpet'
Masterwort
Astrantia major
Nemesia
Nemesia spp.
Okra
Abelmoschus esculentus
Peace Lily
Spathiphyllum spp.
Pearlbush 'The Bride'
Exochorda × macrantha 'The Bride'
Penstemon 'Andenken An Friedrich Hahn'
Penstemon 'Andenken an Friedrich Hahn'
Pineapple Flower
Eucomis spp.
Red Barrenwort
Epimedium × rubrum
Red Guelder Rose
Viburnum opulus 'Roseum'
Rose
Rosa 'Cecile Brunner'
Rose 'Iceberg'
Rosa 'Iceberg'
Rudbeckia 'Goldsturm'
Rudbeckia fulgida var. sullivantii 'Goldsturm'
Sacred Bamboo
Nandina domestica
Siberian Bugloss 'Jack Frost'
Brunnera macrophylla 'Jack Frost'
Snowy Mespilus
Amelanchier × lamarckii
Soft Caress Mahonia
Berberis ganpinensis 'Soft Caress'
Spiny Bear's Breeches
Acanthus spinosus
Tulip Tree
Liriodendron tulipifera
Wallflower 'Bowles's Mauve'
Erysimum 'Bowles's Mauve'
Willow-Leaved Sunflower
Helianthus salicifolius
Winter-Flowering Cherry 'Autumnalis'
Prunus x subhirtella 'Autumnalis'