Plant Growing Guides

Oakleaf Candytuft

Iberis sempervirens

Oaxacan Blue

Salvia hispanica var. oaxacana

Obedient Plant

Physostegia virginiana

Oblong Sundew

Drosera intermedia

October Skies

Aster novi-belgii 'October Skies'

Oculatus Basil

Ocimum basilicum 'Oculatus'

Odontoglossum Crispum Hybrid Orchid

Odontoglossum crispum × (hybrid parentage)

Odorata

Reseda odorata

Odorata Nana Water Lily

Nymphaea odorata var. minor

Odorata Pink Water Lily

Nymphaea odorata var. rosea

Odorata Pygmaea Water Lily

Nymphaea odorata var. pygmaea

Odorata Red Water Lily

Nymphaea odorata var. rubra

Odorata Sulphurea Water Lily

Nymphaea odorata sulphurea

Odorata White Water Lily

Nymphaea odorata var. alba

Evening Primrose

Oenothera biennis

Oenothera deltoides

Oenothera deltoides

Common Basil

Ocimum basilicum

Oklahoma Dwarf Pansy

Viola × wittrockiana 'Oklahoma Dwarf'

Oklahoma Pink

Dianthus chinensis × barbatus

Oklahoma Scarlet

Rosa oklahoma

Old Fashioned Bleeding Heart

Dicentra spectabilis

Excavatum Orchid

Oncidium excavatum

Oncocyclus Iris

Iris oncocyclus

On Parade

Dahlia × hybrida 'On Parade'

Opal Basil

Ocimum basilicum var. purpurascens

Opal Basil

Ocimum basilicum 'Opal'

Opening Night Petunia

Petunia × hybrida 'Opening Night'

Opium Poppy Picotee

Papaver somniferum 'Picotee'

Opium Poppy White Cloud

Papaver somniferum 'White Cloud'

Oppenheimiana Cactus

Rebutia oppenheimiana

Optica Rubra

Ocimum basilicum var. purpurascens 'Optica Rubra'

Optima Basil

Ocimum basilicum 'Optima'

Orange Beauty

Calibrachoa × hybrida 'Orange Beauty'

Orange Bouquet

Asclepias tuberosa

Orange Calendula

Calendula officinalis

Orange Glow

Asclepias tuberosa

Orange King

Calendula officinalis 'Orange King'

Orange Mint

Mentha × piperita var. citrata

Orange Queen

Asclepias tuberosa

Orange Rocket

Asclepias tuberosa 'Orange Rocket'

Orange Star

Ornithogalum dubium

Orange Sun

Heliopsis helianthoides var. scabra 'Orange Sun'

Orange Zest

Ocimum basilicum 'Orange Zest'

Orbit Rose

Rosa × hybrida 'Orbit'

Orchid Cactus

Selenicereus anthonyanus

Orchid Companion Plants

Various species (Orchidaceae family companions)

Oregano

Origanum vulgare

Oregano and Marjoram

Origanum vulgare (oregano) and Origanum majorana (marjoram)