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The Garden Helper's Plant of the Day Archive

The Plants of the Day for May 2011

Below you will find an index of all the plants, flowers and trees that have been profiled as a
Plant of the Day at The Garden Helper and at The Gardener's Forum

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May 1, 2011
Rhododendron 'President Roosevelt'
Rh. 'President Roosevelt'
Known for its glossy, deep green foliage with bold yellow variegation. Branches break easily. Needs protection from full sun in the afternoon. Trusses of 5-11 white flowers edged and flushed in bright red. Blooms in May
Grows to 4' tall and wide.
Hardy in USDA zones 7-9.
Rhododendron Care
Pruning Rhododendrons
Transplanting Rhododendrons
May 2, 2011
Variegated Hosta Plant
Plantain Lily
Hosta undulata

The Hosta, or Plantain Lily is a very useful, long lived perennial for the shade garden. This family of plants is known for it's decorative, large clumps of lush green foliage and spikes of lily shaped, sometimes fragrant flowers which appear later in summer.
Hardy in USDA zones 3-9
May 3, 2011
Sweet Sunshine
Petunia
Petunia x hybrida

Petunias have long been the most popular flowering annual plant for use in hanging baskets, window boxes and for border plantings. There are many single, ruffled and double flowering varieties available in a rainbow of colors. Petunias are frost tender plants that are only hardy in zones 9-11, so they are almost always grown as annuals
May 4, 2011
Solenostemon scutellarioides
Painted Nettle Coleus
Solenostemon scutellarioides

Coleus are tender perennials that make nice house plants as long as they receive sufficient light and food. Growing Coleus from seed is quite easy and quick. Seeds can be sprouted and showing their first colors in as little as two weeks.
Hardy in zones 10-12.
May 5, 2011
Viola tricolor
Johnny Jump Up
Viola tricolor

The Smiling Face on each tiny Violet Flower will brighten every corner of your garden! There are almost 500 different species of Viola, which include annuals, biennials, tender and hardy perennials.
Hardy zones vary
May 6, 2011
Centaurea cyanus
Bachelor's Button
Centaurea cyanus

Bachelor's Button is an easy to grow, annual version of the Mountain Cornflower.
Brightly colored, 1½" flowers begin in late spring.
Excellent for dried flowers and potpourri. Well suited for growing in containers
This is an annual plant.
May 7, 2011
Ranunculus asiaticus
Persian Buttercup
Ranunculus asiaticus

Persian Buttercups provide a continuing display of beautiful 3"-5" Camellia-like flowers atop branched, 8"-18" stems, from late spring through mid summer. They are well suited plants for growing in planters
Hardy in USDA zones 8-10
May 8, 2011
Chrysanthemum
Chrysanthemums
Chrysanthemum plants are just about the easiest of all of the perennials to grow. There are hundreds of varieties of Chrysanthemums, giving you a multitude of options for height, color, flower size and time of bloom.
Hardy in USDA zones 4-9
May 9, 2011
Rhododendron 'Honey Butter'
Rh. 'Honey Butter'
Large, pinkish-yellow flowers are edged with pink, in domed trusses of 12-20 blooms in late May. Olive green, 5½ leaves.
Grows to 3' tall x 3' wide.
Hardy in USDA zones 7-9.
Rhododendron Care
Pruning Rhododendrons
Transplanting Rhododendrons
May 10, 2011
Reiger Begonia
Tuberous Begonias
Begonia tuberhybrida

With proper care, tuberous Begonias will remain in bloom for several months, producing large clusters of single or double flowers in almost every color except for blue. Some varieties are upright plants, but the majority of tuberous Begonias grown are multi-stemmed, pendulous hanging plants.
Hardy in USDA zones 9-11
May 11, 2011
Pacific Maidenhair Fern
Pacific Maidenhair Fern
Adiantum pedatum

Pacific Maidenhair Ferns add a bit of graceful elegance to any partial to fully shaded area of your garden. The delicate, deciduous fronds emerge in early spring on black, wire-like stems that reach 18-24 inches, in clumps that can eventually spread to 3 ft.
Hardy in USDA zones 3-8
May 12, 2011
Red Hot Poker
Torch Lily
Kniphofia uvaria

The stately flowers of the Torch Lily, Kniphofia uvaria provide a dramatic display. If you have sufficient space, you can select varieties to provide bloom from May through October!
Hardy in USDA zones 5-10
May 13, 2011
Cortaderia selloana
Pampas Grass
Cortaderia selloana

Pampas Grass is a fast growing plant that will quickly form a 6 foot clump of light green, grass-like foliage. In late summer and fall, 10 ft. reed-like stems emerge, topped with large, silky plumes of silvery white or pink tinged flowers.
May become invasive!
Hardy in USDA zones 7-10
May 14, 2011
Rhododendron catawbiensis
Rhododendron catawbiensis
Domed trusses of up to 20 cup shaped, purple or occasionally white or pink flowers in late spring to early summer. Glossy dark green, 6" leaves.
Grows to 10' tall and 8' wide.
Hardy in USDA zones 4-9.
Rhododendron Care
Pruning Rhododendrons
Transplanting Rhododendrons
May 15, 2011
Terra Cotta
Trailing Petunia
Calibrachoa

Calibracoa shares most of the features of a Petunia, except everything is shrunk down to about one fourth the size. Trailing Petunias are easy to care for, fast growing plants that will produce an abundance of Petunia-like blooms all summer long.
Hardy in USDA zones 9-11
May 16, 2011
Ligularia dentata
Leopard Plant
Ligularia

Ligularias are unusual perennials with big leaves and unique daisy-like flowers. They are excellent specimen plants for growing in tubs, boggy areas or along the banks of stream or pond. The ideal location for growing most Ligularias is in a bog garden with fertile, humus-rich soil in partial shade.
Hardy in USDA zones 4-9
May 17, 2011
Sword Fern
Western Sword Fern
Polystichum munitum

Native to the coastal forests of North America, this large, easy to grow fern grows best when planted in compost rich soil in a cool, shady, moist garden location. Western Sword Ferns are deer resistant and suitable for growing in the acidic soil found beneath Cedar Trees and other conifers.
Hardy in USDA zones 3-8
May 18, 2011
Rhododendron macrophyllum
Pacific Rhododendron
Rhododendron macrophyllum

Pale to deep pink, magenta or white flowers with reddish flecks in trusses of 10-15 blooms in May in the lowlands or July at higher elevations. Glossy dark green, 6-8" leaves. Tolerant of drought, heat and sea spray
Grows to 10' tall and wide.
Hardy in USDA zones 6-9.
Rhododendron Care
Pruning Rhododendrons
Transplanting Rhododendrons
May 19, 2011
Allium aflatunense
Flowering Onion
Allium

There are over seven hundred known species of Alliums.
Flowering Onions are bulb type plants with green, grass-like foliage. They produce 1-6 ft. hollow, leafless stems that are topped with 1"-5" flower clusters called umbrels that can contain as many as 100 tiny, star shaped flowers.
Hardy zones vary.
May 20, 2011
Red Flowering Currant
Red Flowering Currant
Ribes sanguineum

This 6-10 foot tall deciduous shrub is hardy in USDA Planting Zones 5-10. In early spring it produces pendulous clusters of red or pink flowers that attract and feed hummingbirds, bees and butterflies. The small berries are eaten by wild birds.
May 21, 2011
Primula 'Granny Graham'
Primrose
Primula 'Granny Graham'

There are hundreds of species and varieties of Primrose that are suitable for a wide range garden uses. Primroses prefer cool temperatures, rich humus soil with lots of compost.
Hardy in USDA zones 5-9
May 22, 2011
Agapanthus praecox
Lily of the Nile
Agapanthus praecox

The Lily of the Nile is a tuberous rooted, clump-forming tender perennial with deep green, arching, strap like leaves. In mid summer to early fall, they produce flower heads called umbrels that consist of up to a hundred small tubular flowers in colors from a brilliant blue to pure white.
Hardy in USDA zones 9-11
May 23, 2011
Enkianthus campanulatus
Redvein Enkianthus
Enkianthus campanulatus

These deciduous shrubs are known for their small, densely clustered, lightly scented bell shaped flowers that appear in late spring and the layered effect of their small, stiff, bluish-green leaves.
In the fall, the foliage turns to shades of yellow, orange or red.
Hardy in USDA zones 6-9.
May 24, 2011
Polka Dot Plant
Polka Dot Plant
Hypoestes phyllostachya

The Polka Dot has long been known as somewhat of a novelty type house plant, primarily used in dish gardens and terrariums. Today, it is also gaining widespread popularity for use as an annual plant for the garden. Polka Dot Plants are available with bright pink, red, white or silver spots and blotches.
This is an annual plant.
May 25, 2011
Iberis sempervirens
Evergreen Candytuft
Iberis sempervirens

The Iberis genus of plants includes about fourty different species of annuals, perennials and sub-shrubs, with flower colors in shades of white, red, pink or lavender.
They are great plants for borders or in your Rock Garden.
Hardiness zones vary
May 26, 2011
Asteriscus maritimus
Beach Daisy
Asteriscus maritimus

Beach Daisies are low growing evergreen plants that grow 1 ft. tall with a 3-4 ft. spread. They have leathery, slightly fuzzy, silvery green foliage, and for 6-8 months of the year will cover themselves with 1"-1½", bright yellow Daisy flowers.
Hardy in USDA zones 9-11
May 27, 2011
Arctotis x hybrida
African Daisy
Arctotis

African Daisies typically have bold, beautiful foliage and large, 3"-4", intensely colored flowers with bright centers. The foliage is grey to silvery green and coated with soft, downy silver hairs. The Daisy like flowers close at night.
Hardy in USDA zones 9-11
May 28, 2011
Rhododendron 'Nancy Evans'
Rhododendron 'Nancy Evans'
New, reddish foliage turns to a bronzed green. Orange buds open to golden peach colored, funnel shaped flowers in bell shaped trusses of 15-20 blooms in late May.
Grows to 3' tall x 3' wide.
Hardy in USDA zones 7-9.
Rhododendron Care
Pruning Rhododendrons
Transplanting Rhododendrons
May 29, 2011
Rhododendron 'Olga Mezitt'
Rhododendron 'Olga Mezitt'
Domed trusses of 10-12 soft pink, funnel shaped flowers open in early May. Two inch, olive green leaves turn to a nice mahogany color in the winter months.
Grows to 3' tall x 4' wide.
Hardy in USDA zones 5-9.
Rhododendron Care
Pruning Rhododendrons
Transplanting Rhododendrons
May 30, 2011
Rhododendron 'Nova Zembla'
Rhododendron 'Nova Zembla'
Bright red, slightly ruffled flowers with burgundy blotches emerge in ball shaped trusses of 12-15 blossoms to adorn this mid-May bloomer. 6" leaves are a glossy, deep green. Grows to 5' tall x 6' wide.
Hardy in USDA zones 4-9.
Rhododendron Care
Pruning Rhododendrons
Transplanting Rhododendrons
May 31, 2011
Rhododendron 'Fred Peste'
Rhododendron 'Fred Peste'
Cardinal red blooms with deep red throats in trusses of 14 funnel shaped flowers. 3½" olive green leaves.
Grows to 2' tall x 3' wide.
Hardy in USDA zones 7-9.
Rhododendron Care
Pruning Rhododendrons
Transplanting Rhododendrons

More Plants and Flowers

October 2010

November 2010

January 2011

February 2011

March 2011

April 2011