Plant Growing Guides

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 Sedge

Carex quercetorum

Oat Grass

Avena sativa

Oats and Barley

Avena sativa (Oats) / Hordeum vulgare (Barley)

Ochlockonee Blueberry

Vaccinium ashei

Ocotillo

Fouquieria splendens

October Daphne

Sedum sieboldii

October Daphne Sedum

Sedum sieboldii 'October Daphne'

Sweet Osmanthus

Osmanthus fragrans var. odoratissima

Oklahoma Blaze

Rosa 'Oklahoma Blaze'

Oklahoma Rose

Rosa 'Oklahoma'

Old Blush

Rosa × odorata 'Pallida'

Old Gold

Juniperus x media 'Old Gold'

Oleander

Nerium oleander

Oleander 'Pink Petite'

Nerium oleander 'Pink Petite'

Oleander 'Sister Agnes'

Nerium oleander 'Sister Agnes'

Oleander Variegata

Nerium oleander 'Variegata'

Daisy Bush

Olearia

Tree Daisy

Olearia arborescens

Henry Travers Daisy Bush

Olearia × haastii 'Henry Travers'

Holly-leaf Olearia

Olearia macrodonta

Olearia microdisca

Olearia microdisca

Daisy Bush

Olearia paniculata

Dusty Daisy Bush

Olearia phlogopappa

Olearia stellulata

Olearia stellulata

Olney threesquare

Scirpus olneyi

O'Neal Blueberry

Vaccinium corymbosum 'O'Neal'

O'Neal Rabbiteye Blueberry

Vaccinium ashei 'O'Neal'

Japanese Mondo Grass

Ophiopogon japonicus

Opuntia

Opuntia ficus-indica

Opuntia Ellisiana

Opuntia ellisiana

Indian Fig Prickly Pear

Opuntia ficus-indica

Opuntia (High Altitude Species)

Opuntia spp. (alpine/montane varieties)

Opuntia megacantha

Opuntia megacantha

Orange Flowering Maple

Abutilon aurantiacum

Orange Hibiscus

Hibiscus rosa-sinensis

Orange Ixora

Ixora coccinea

Orange Queen Heather

Erica cinerea 'Orange Queen'

Oregon Evergreen

Rubus laciniatus

Oregon Grape

Mahonia aquifolium

Oregon Grape Holly

Mahonia aquifolium

Oreocereus

Oreocereus (genus)

Organ Pipe

Stenocereus thurberi

Ornamental Evergreens

Various species (e.g., Ilex, Taxus, Buxus, Chamaecyparis)