Plant Growing Guides

OAC Thunder Oat

Avena sativa

Oak Sedge

Carex quercetorum

Oat Grass

Avena sativa

Oat Groats Hulless

Avena sativa var. nuda

Hulless Oats Marion

Avena sativa var. nuda

Oat Groats Hulless Paul

Avena sativa

Oats

Avena sativa

Common Oats

Avena sativa

Oats (Nurse Crop)

Avena sativa

Oats (Nurse Crop) Marion

Avena sativa 'Marion'

Oats and Barley

Avena sativa (Oats) / Hordeum vulgare (Barley)

Winter Cereal Rye

Secale cereale

Obedient Plant

Physostegia virginiana

Oberkulmer Rotkorn

Triticum aestivum subsp. spelta

Oberkulmer Spelt

Triticum dicoccum

Oblong Sundew

Drosera intermedia

Obtuse Sedge

Carex obtusata

October Skies

Aster novi-belgii 'October Skies'

Odontioda Bictoniense

Odontioda bictoniense

Odontoglossum Orchid

Odontoglossum spp.

Odorata Nana Water Lily

Nymphaea odorata var. minor

Oklahoma Scarlet

Rosa oklahoma

Olney threesquare

Scirpus olneyi

Oncidium Alliance Orchids

Oncidium alliance (genus Oncidium and related genera)

Oncidium Hybrid

Oncidium × hybridum

Opium Poppy Picotee

Papaver somniferum 'Picotee'

Optimara Freya

Saintpaulia ionantha 'Optimara Freya'

Orange Bottlebrush Ginger

Zingiber spectabile

Orange Hawkweed

Hieracium aurantiacum

Orange Impression

Tulipa × gesneriana 'Orange Impression'

Orchardgrass

Dactylis glomerata

Orchid Cactus

Selenicereus anthonyanus

Dendrobium Orchid

Dendrobium spp.

Oncidium Orchid

Oncidium spp.

Oriental Breeze

Chrysanthemum morifolium 'Oriental Breeze'

Oriental Hybrid Lily 'Mona Lisa'

Lilium 'Mona Lisa'

Oriental Hybrid Lily 'Muscadet'

Lilium 'Muscadet'

Oriental Hybrid Lily 'Siberia'

Lilium 'Siberia'

Oriental Hybrid Lily Sorbonne

Lilium 'Sorbonne'

Oriental Hybrid Lily Stargazer

Lilium 'Stargazer'

Oriental Hybrid Lily

Lilium orientalis hybrids

Orientalis Hybrid Lily 'House of All Hallows'

Lilium × orientalis 'House of All Hallows'

Orientalis Hybrid Lily

Lilium × orientalis

Oriental Lily Hybrid 'Sorbonne'

Lilium orientalis 'Sorbonne'

Oriental Lily 'Muscadet'

Lilium orientalis 'Muscadet'

Oriental Lily Siberia

Lilium 'Siberia'

Oriental Lily 'Sorbonne'

Lilium orientalis 'Sorbonne'

Oriental Lily Stargazer

Lilium 'Stargazer'