Hollyhock

Perennials

Honeylocust, Imperial

Trees

Honeylocust, Shademaster

Trees

Honeylocust, Skyline

Trees

Honeylocust, Sunburst

Trees

Honeysuckle Japanese, Hall's

Vines

Honeysuckle Japanese, Purple

Vines

Honeysuckle Shrub, Arnold's Red

Shrubs

Honeysuckle, Goldflame

Vines

Honeysuckle, Mandarin

Vines

Honeysuckle, Peaches and Cream Dutch

Vines

Honeysuckle, Pink Lemonade

Vines

Honeysuckle, Thunderbolt Box

Shrubs

Horehound, Silverheels Horehound, Silver Edged Horehound

PerennialsGround CoverEdibles

Hornbeam, Columnar (Pyramidal)

Trees

Hornbeam, Dwarf Columnar

Trees

Hornbeam, Dwarf Monument

Trees

Hornbeam, Emerald Avenue

Trees

Hornbeam, Frans Fontaine Columnar

Trees

Hornbeam, Lucas Columnar

Trees

Hornbeam, Rising Fire American

Hornwort

PerennialsPond Plants

Horsechestnut, Briotii (Ruby Red or Buckeye)

Trees

Horsechestnut, Fort McNair

Trees

Horsetail / Scouring Rush / Snake Grass

PerennialsPond Plants

Hosta

Perennials

Hummingbird Carpet, Hardy Fushia

PerennialsGround Cover

Hydrangea, Moonlight Chinese Climbing

Vines

Ice Plant

Ground CoverPerennials

Iceland Poppy

Annuals

Impatiens

Annuals

Indian Grass

Grass

Indian rice grass

GrassPerennials

Iris, Flag

PerennialsPond Plants

Ivy Boston, Green Showers

Vines

Ivy Boston, Veitchi

Vines

Ivy, Baltic Ivy

Ground CoverPerennials

Ivy, English Thorndale

Ground CoverPerennialsVines

Ivy, Glacier Ivy

Ground CoverPerennials

Ivy, Hahn's Ivy

Ground CoverPerennials

Ivy, Needlepoint Ivy

Ground CoverPerennials

Jack Frost, Siberian bugloss, Brunnera

PerennialsGround Cover

Jacob's Ladder

Perennials

Japanese Forest Grass, Forest Grass

Grass

Japanese Iris

Perennials

Japanese Lilac Tree, Ivory Pillar

Trees

Japanese Lilac Tree, Ivory Silk

Trees

Japanese Maple, Autumn Moon

Trees

Japanese Maple, Bloodgood

Trees

Japanese Maple, Fireglow

Trees

Japanese Maple, Full Moon

Trees

Japanese Maple, Lion's Head

Trees

Japanese Maple, Seiryu Laceleaf

Trees

Japanese Maple, Tamukeyama Laceleaf

Trees

Japanese Sweet Flag

PerennialsPond Plants

Japanese Water Iris / Rabbit Ear Iris

Perennials

Joe Pye Weed

Perennials

Jujube, Contorted

EdiblesTrees

Juniper, All Gold

ConifersShrubsGround Cover

Juniper, Alpine Carpet

ConifersGround CoverShrubs