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Basil ‘Oriental Breeze’
Oenothera 'Apricot Delight'
Oenothera 'Sunset Boulevard'
Oenothera acaulis var. aurea
Oenothera biennis
Oenothera hookeri
Oenothera kunthiana
Oenothera missouriensis
Oenothera odorata
Oenothera pallida 'Innocence'
Oenothera pilosella 'Yella Fella'
Oenothera speciosa
Oenothera tetragona
Okra 'Clemson's Spineless' (Heirloom Variety)
Okra, Baby 'Burgundy'
Olea europaea
Omphalodes linifolia
Onion ‘Long Red Florence’ (Heirloom Variety)
Onion 'Ailsa Craig' (Heirloom Variety)
Onion 'Bedfordshire Champion' (Heirloom Variety)
Onion 'Rossa di Bassano'
Onion 'Sturon' (Organically sourced variety)
Onion, Bunching 'Ishikura'
Onion, Pickling 'Paris Silverskin' (Heirloom Variety)
Onion, Spring ‘Red Beard’
Onion, Spring 'White Lisbon' (Heirloom Variety)
Onobrychis viciifolia
Ononis rotundifolia
Ononis spinosa
Onopordum arabicum
Onopordum acanthium
Onosma rigida
Ophrys apifera
Opopanax chironium
Opuntia Mixed Species
Opuntia Winter Hardy Mixed
Oregano
Oregano ‘Dost’
Oregano Verde
Oregano, Greek
Oregano, Showy Origanum vulgare variety – but not O.pulchellum
Origanum laevigatum ‘Hopleys’
Orites myrtoidea
Orlaya grandiflora
Ornithogalum balansae
Ornithogalum caudatum
Ornithogalum nutans
Ornithogalum pyrenaicum
Orobanche hederae
Orychophragmus violaceus
Oryzopsis hymenoides
Osmanthus fragrans
Osteospermum ecklonis
Osteospermum ecklonis ‘Ballade’ Mixed
Osteospermum hyoseroides 'Gaiety'
Osteospermum vaillantii
Oxalis rosea
Oxydendrum arboreum
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