Plant Growing Guides

Oakington Blue Eyes

Veronica chamaedrys subsp. chamaedrys

Oakleaf Candytuft

Iberis sempervirens

Oakleaf Hydrangea

Hydrangea quercifolia

Oakleaf Hydrangea 'Alice'

Hydrangea quercifolia 'Alice'

Oakleaf Hydrangea 'Munchkin'

Hydrangea quercifolia 'Munchkin'

Oakleaf Hydrangea Pee Wee

Hydrangea quercifolia 'Pee Wee'

Oakleaf Hydrangea Snowflake

Hydrangea quercifolia 'Snowflake'

Oak Park Blue Phlox

Phlox divaricata subsp. laphamii 'Oak Park Blue'

Obedient Plant

Physostegia virginiana

Oblong-leaved Sundew

Drosera intermedia

Oblong Sundew

Drosera intermedia

October Daphne Sedum

Sedum sieboldii 'October Daphne'

October Skies

Aster novi-belgii 'October Skies'

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

Oklahoma Blaze

Rosa 'Oklahoma Blaze'

Oklahoma Dwarf Pansy

Viola × wittrockiana 'Oklahoma Dwarf'

Oklahoma Pink

Dianthus chinensis × barbatus

Oklahoma Rose

Rosa 'Oklahoma'

Oklahoma Scarlet

Rosa oklahoma

Old Fashioned Bleeding Heart

Dicentra spectabilis

Old Gold

Juniperus x media 'Old Gold'

Olga Mezitt

Rhododendron 'Olga Mezitt'

Oncocyclus Iris

Iris oncocyclus

Opening Night Petunia

Petunia × hybrida 'Opening Night'

Alpine Bee Orchid

Ophrys alpina

Opium Poppy Picotee

Papaver somniferum 'Picotee'

Opium Poppy White Cloud

Papaver somniferum 'White Cloud'

Opuntia (High Altitude Species)

Opuntia spp. (alpine/montane varieties)

Orange Beauty

Calibrachoa × hybrida 'Orange Beauty'

Orange Bouquet

Asclepias tuberosa

Orange Calendula

Calendula officinalis

Orange Glow

Asclepias tuberosa

Orange Hawkweed

Hieracium aurantiacum

Orange Impression

Tulipa × gesneriana 'Orange Impression'

Orange King

Calendula officinalis 'Orange King'

Orange Marmalade Hosta

Hosta 'Orange Marmalade'

Orange Queen

Asclepias tuberosa

Orange Queen Heather

Erica cinerea 'Orange Queen'

Orange Rocket

Asclepias tuberosa 'Orange Rocket'

Orange Sun

Heliopsis helianthoides var. scabra 'Orange Sun'

Orbit Rose

Rosa × hybrida 'Orbit'