Highly Rated Camellias Growing In Zone 6 Gardens

'April Tryst' camellia

You can now grow camellias in warm winter areas of the middle Atlantic States (Delaware, Maryland, Virginia) as well as the mid-South (Zones 6 and 7).  Depending on variety, camellias bloom in shades of white, pink, red, and some speckled and striped kinds. 

In northern locales where winters go down to 0 - 10 degrees F,  planting time starts from spring to early September to allow the root systems to grow deeply before cold weather arrives in December.

Sheltered the new camellias from direct sunlight and high wind. A site should have good soil drainage and has been generously amended with organic matter. Fertilize with a water soluble acidic fertilizer like Miracle-Gro or Hollytone according to package directions. Camellias grow best in partial shade — they do not like late afternoon summer sun.

'Snow Flurry'

Do not overwater camellias. A planting site under tall trees or on the north or west side of a building is ideal. Plants grown in full sun often develop leaf scorch.

Camellias are relatively deer-resistant. Deer and other garden nuisances are not known to bother camellias.
Some favorites in my East Tennessee Garden (zone 6-b) are:

‘April Dawn’ grows to about 10 feet tall and 6 feet wide with pale pink petals with dark pink streaks!

‘Artic Rose’ is double red floral beauty. This compact variety only grows to 6 feet tall and wide.

‘Snow Flurry’ (C. oleifera)  6 – 8 feet tall with 3-1/2 inch white blooms at an early age.

‘Autumn Pink Icicle’ (C. oleifera) - 5-6 feet upright shrub; large, double, rose-pink blooms.

‘Winter’s Snowman’ - 12 feet tall and 8 feet wide shrub; semi-double white flowers in fall.

‘Pink Icicle’ – 8 - 10 feet tall shrub; large 4-1/2 inch shell pink semi-double blooms in March/April

'April Remembered' - large cream to pink shaded semi-double flowers on a fast growing plant.

'April Rose' - Rose red formal double flowers on a compact.

'April Tryst' - Red, anemone form flowers on a well formed plant with medium growth.

‘Korean Fire’ (C. japonica) - vigorous 12-15 feet tall and 6-8 feet wide, blooming in March - early May; 3-5 inch wide deep red, single blooms /contrasting golden stamens in center.

Rodgersia - Bold Look In A Shady Garden

Rodgersia

Rodgersia (two forms) is an outstanding summer flowering perennial grown for its broad foliage and showy flowers. Rodgersia has one key requirement: consistent soil moisture through the spring and summer months. Don’t attempt to grow this bold perennial unless its water needs is totally satisfied. Plants prefer wet, boggy feet (roots).

Rodgersias (Rodgersia pinnata) sport bold pinnately compound leaves that emerge with a dark bronze tint. Leaves measure more than a foot wide and 3-4 foot high perennial. In early summer, white bloom panicles rise 2 to 3 feet above the foliage and bloom over 3 to 4 weeks. 

A secondary species, Chestnut-leaved Rodgersia (R. aesculifolia), is another clump form with bold green foliage and bears creamy-white flowers in mid-summer (USDA hardiness zones 5 to 8).

Varieties of rodgersia: 'Chocolate Wing' -- cherry blossom pink and cream blooms); ‘Alba’- white flowers and dark green leaves/bronze veining.

Rodgersia prosper in partial day sun tor light shade all day. Site them nearby water features like within the splash-zone of a waterfall. They grow exceptionally well along woodland creeks.

When properly sited, the foliage remains blemish-free all season long. Disease and pest problems are rare if growing conditions are ideal. Deer and rabbits rarely trouble them

.

Planting in containers: plant a single crown into a 3 to 5 gallon size container filled with humus-rich potting soil. To restrict most water loss, line the bottom of the container with plastic shopping bags. This reduces irrigation needs that saves on your monthly water bill.

Ligularias Like "Wet Feet"

Ligularia 'The Rocket'

Ligularias (ligs) are outstanding summer flowering perennials  Two species and numerous varieties are grown for their bold foliage and showy flowers. Ligs have one special need: consistent soil moisture through the spring and summer months. Don’t attempt to grow either one of these awesome plants unless their water needs will be satisfied. These plants prefer wet, boggy feet (roots).

Their roots must be kept constantly moist so that leaves don’t wilt or "faint". Even after a summer shower, ligs may still go through a brief spell fainting in the mid-afternoon due to summer heat and water loss from transpiration.  By early evening the leaves recover fully hydrated.

Bigleaf ligs (L. dentata) and narrow-spiked ligularias (L. stenocephala), aka "golden ray", grow well in temperate climes (USDA hardiness zones 6 and 7). Tropical species are listed under the genus Farfugium  (zones 7b -10). Favorite cultivars include: 'The Rocket', 'Bottle Rocket', 'Britt-Marie Crawford', 'Desdemona'.

Ligularias (ligs) thrive in part day sun or light shade all day. Site them nearby water features like within the splash-zone of a waterfall. They grow exceptionally well along woodland creeks.
When properly sited, the foliage remains blemish-free season-long. Disease and pest problems are rare if growing conditions are ideal. Deer and rabbits rarely trouble them
.
Planting in containers: plant a single crown into a 3 to 5 gallon size container filled with humus-rich potting soil. To restrict most water loss, line the bottom of the container with plastic shopping bags. This reduces irrigation needs that saves on your monthly water bill.

Venus® Is A Unique Flowering Dogwood

7" Bracts of Venus® dogwood (C. kousa x C. nuttali)

Spring flowering dogwoods (Cornus spp.) are back in vogue again (USDA hardiness zones 6-9). A better understanding about growing dogwoods coupled with improved resistant disease varieties have seen the return of dogwoods to landscapes again.

If you want to plant a variety with the largest flowers, no question it is Venus®. This hybrid dogwood (Cornus kousa 'Chinensis' x Cornus nuttalii 'Goldspot' x Cornus kousa 'Rosea')  was developed at Rutgers University by Dr. Elwin R. Orton (now retired). The tree's large bracted blooms measure 6 - 7 inches across in April and May. 

Venus dogwood grows vigorously, 15-20 feet tall (slightly greater in spread). It is a small deciduous tree forms a dense, low-branched, spreading habit.

Venus is resistant to anthracnose and powdery mildew diseases. It has clean dark green foliage and large flowers. Red dogwood fruits attract lots of birds in early fall. Fall leaf color is red to orange.

This dogwood grows in average, medium moisture, well-drained soils in full sun to partial shade. In southeastern U.S., morning sunlight and afternoon shade is best. Summer leaf scorch may indicate too much direct sunlight and/or exposure to hot, windy or dry soil conditions. The tree benefits by applying 2-3 inches of a wood-based or needle mulch that keeps tree roots cool and moist. For the first 2-3 summers, a young dogwood should be irrigated during dry periods.

Venus dogwood, when properly sited and cared for, have few disease and insect problems. Stressed trees become vulnerable to stem cankers and insect borers. Deer are usually not troublesome.

Dogwoods are planted on urban and suburban lawns and around patio areas. Venus dogwood needs to be special ordered from garden centers or purchase from e-commerce nursery sources.

New Hybrid Bleeding Hearts

Dicentra 'Luxuriant' 

Bleeding hearts bloom in April into May (in Tennessee - zones 6 and 7). In cooler northerly locales, flowering may continue into summer.  The bright red, pink or white, heart-shaped, pendant flowers are supported on arching stems.

Bleeding hearts (Dicentra spp.) are truly one of nature’s glorious delights in the spring - early summer garden (USDA hardiness zones 3-9). Old fashion bleeding hearts (D. spectabilis), indigenous to Asia, grow taller and wider compared to their North American counterparts wild bleeding heart (D. exima) and Dutchman's breeches (D. cucullaria).

A number of new cultivars have been released in recent years that are hybrid crosses between D. peregrine (native to Japan) x D. exima (native to eastern North America) x D. formosa (native to Western U.S.). These bleeding heart grow more compact and robust, are longer flowering, exhibit blue-gray foliage, and offer more floral color choices.

Four notable hybrid cultivars include 'Luxuriant' (D. eximia  x D. formosa  - deeply-cut,  grayish-green foliage and cherry red blooms. ‘King of Hearts’ (D. peregrina x D. formosa subsp. oregana x D. eximia) - very compact grower only 9 inches high and 14 inches wide. 'Fire Island' (D. peregrina x D. exima) - white tipped magenta red flowers from late spring into midsummer and 12 inch x 20 inch mound of frosty blue foliage. ‘Valentine’ - a vigorous hybrid form with showy cherry red/white tipped flowers.

New hybrid forms tend to grow more vigorously and are spaced 24-36 inches apart. Good soil drainage is essential for bleeding hearts. Plant in a humus-rich mildly acidic soil along with more hours of sunlight, preferably in the morning. Lightly mulch around plants in a woodland garden. In late winter feed a slow-release fertilizer at the low package rate.

In southern locales hybrid forms generally die back (go dormant) by mid-summer unless regularly irrigated. Crowded clumps should be divided either in very early spring or after flowering.

Spring flowers attract butterflies and hummingbirds. Aphids, slugs and snails occasionally feed on the leaves. Plants are deer and rabbit resistant.

Bleeding hearts are great companions with other woodland plants such as ferns, lungworts (Pulmonaria spp.), brunneras, coral bells (Heuchera), and foam flowers (Tiarella).

Note: in recent times the genus Dicentra has been changed to Lamprocapnos.

Inkberry Holly A Worthy Substitute For Boxwood

Ilex glabra 'Densa'

Inkberry holly (Ilex glabra), also called gallberry, is a slow-growing broadleaf evergreen shrub (USDA hardiness zones 4-9). Inkberry grows to 5-8 feet tall and, if not pruned, may spread by root suckers to form colonies. 

Inkberry is native  from eastern Canada to Florida, west to Louisiana.  The dark green glossy leaves (to 1.5” long) have smooth margins and are spineless. Foliage stays attractive in winter unless temperatures dip below 0 °F. Greenish white flowers appear in spring, but are mostly inconspicuous.

Inkberry grows in average, medium to wet, acidic soils and in full sun to partial shade. It is one of few holly species that tolerates wet soils. Inkberries are dioecious (separate male and female plants). Female plants need a male pollinator to produce black,  3/8 inch diameter, berry-like (drupe) fruits that mature in early fall and persist throughout late winter into early spring unless consumed by birds and other wildlife.

Inkberry holly is a popular hedging shrub that tends to grow faster than a boxwood. Prune in early spring before new growth begins. Plants generally need minimal pruning unless used as a hedge. Remove root suckers as they form. Many landscape cultivars do not root sucker as badly as species. 
Leading cultivars are 'Densa', 'Shamrock', and 'Nordic'

No serious insect or disease problems trouble inkberry hollies. Leaf spotting occurs in wet summers. Spider mites may appear, especially during dry spells. In high pH (alkaline) soils, foliar chlorosis (yellowing) may happen.

Mass or group several inkberry hollies as a shrub border, a low foundation planting. Species inkberries will naturalize in moist woodland gardens or near streams or ponds.

Honey derived from inkberry flowers is a highly-rated. It is locally marketed in certain parts of the southeastern U.S. Dried and roasted inkberry leaves were first used by Native Americans to brew "Appalachian tea" a black tea-like drink.

Multi-Purpose 'Evergold' Sedge

'Evergold' sedge

Japanese sedges (Carex oshimensis)  are fine-textured variegated sedges that typically grow as low, grass-like mounds or clumps. They are found in woodlands and rocky slopes throughout Honshu Island, Japan (USDA hardiness zones 6-8).

Japanese sedges are long-living and foliage is evergreen through most of their growing range. Narrow grass-like variegated leaf blades are upwards of 16 inches long by 5/16 inch wide. Brownish flower spikes appear on triangular stems in spring and have zero ornamental value. 

There are many fine cultivars. I recommend starting with an outstanding cultivar named 'Evergold'. It grows 12 - 18 inches high and 12-18 inches in spread in full shade to partial sunlight and in moist to average soil well- drained soil. Water well after planting and regularly until established after one year. Foliage color is richer in part shade. Plants spread slowly by short rhizomes and can be propagate by rhizome division in early spring.

Space plants 10 inches apart. Group or mass as a ground cover for edging along paths or sidewalks. Utilize as a specimen accent plant in a woodland or a rock garden. Evergold sedge can be planted in low spots and along the edges of a stream, pond, or a water garden. Evergold sedges make perfect additions to mixed containers and window boxes. The leafy mounds spill over the edge of containers. 

Trim back all last year’s growth around the start of spring. No serious insect or disease problems trouble sedges and are deer resistant.

Lo and Behold 'Blue Chip' Buddleia is a Winner

photo taken at JC Raulston Arboretum in June 2009

Lo & Behold® ‘Blue Chip’ is a very dwarf butterfly bush (buddleia) for the summer garden. Take advantage of its compact 3 x 4 foot height and width by planting it in the garden or in a container on a sunny patio deck or patio by itself . In large containers mix in shorter growing summer annuals such as trailing petunia, scaevola or alternanthera.

Lo & Behold® ‘Blue Chip’ maintains its clean growing habit all season long. Gardeners with limited space can attract butterflies and hummingbirds to their garden with this colorful buddleia. It produces loads of fragrant blue flowers which bloom continuously. It thrives in the summer heat and humidity and the foliage stays blemish-free.

'Blue Chip' is non-invasive. It's self-cleaning and will bloom from mid-summer to frost without deadheading. Each proceeding spring, you won’t need to drastically prune 'Blue Chip' as you would the larger growing buddleia varieties. Plants are deer resistant and drought tolerant.
‘Blue Chip’ was still blooming in my Southern Appalachian garden in late October .