
|
Cass
County Extension |

|
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Ajuga |
|
.5-1' |
|
May-June |
| Geneva |
6-9" |
|
Blue |
|
| Reptans |
6" |
|
Blue,Pink,White |
|
Shallow rooted; need water during dry periods.
Prefers partial sun to shade; medium to high moisture required. Winter protection or snow
cover is recommended. Divide clumps when overcrowded; early spring. Doesn't come true from
seed. A. genevensis has green foliage. A.
reptans spreads rapidly by means of stems. Better foliage color in sun, but may
scorch in full sun. Hardier than Geneva Bugle and has a tighter growth habit. Variegated
cultivars are not as hardy. `Bronze Beauty' has dark purplish-bronze foliage. `Burgundy Glow' has foliage with a blend of creamy
white, green and maroon. `Gaiety' has bronze foliage; leaves are glossy and leathery.
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Silver Brocade Artemisia |
4-6" |
1-1.5' |
Insignificant |
----- |
Wooly, silver-gray
foliage; coarser and broader than `Silver Mound'. Shear off flower stalks. Needs good
drainage; may rot in wet soil. Full sun and dry conditions. Divide in early spring just as
new growth is emerging; stem cuttings can be taken in summer.
Bergenia (see Perennial
Flowers)
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Bishop's Weed |
9-12" |
1' |
Insignificant |
----- |
Variegated form is
recommended. Somewhat less vigorous than green form but more attractive. Spreads rapidly
by rhizomes; can become weedy. Highly competitive and deeply rooted. Grows in almost any
type of soil and light condition. Foliage may scorch in full sun. Mowing or clipping back
several times during the summer will eliminate flowers and seed as well as keeping the
plant more compact. Divide in early spring or early fall.
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Crownveitch |
24-30" |
1-2' |
Pink and White |
June-Sept |
Hardy vigorous ground
cover with fern-like leaves. Good for erosion control; often too tall for home use. Best
in areas where it need not be contained. Slow to establish but once established spreads
rapidly and is hard to eradicate. Best in full to part sun, somewhat lean soil and
in fairly dry conditions. In fertile soils it grows rampantly and is hard to control. Mow
2-3 times during the season for a more compact planting. Easily started from seed in
spring. Divide in spring or early fall.
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Ginger |
4-6" |
.5-1' |
Insignificant |
--------- |
Slow to become established and slow spreading. Prefers part to full shade and
moderately rich soil; likes good moisture. Water during dry periods. Divide rhizomes in
early spring. Wild Ginger (American) is
native. Felty heart shaped leaves. Hardier than European Ginger; winter protection is not
needed even though mulching in exposed areas may be beneficial. European Ginger has glossy heart shaped leaves.
Winter protection is recommended.
Hosta (see Perennial
Flowers)
Juniper, creeping (see Evergreen Shrubs)
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Lamb's Ear |
8-15" |
1' |
Pink, Purple |
July-August |
Stachys byzantina
(lanata)
has soft velvety, dense mats of silver-gray color foliage; good contrast
plant. Square stems and opposite leaves with flowers borne in whorls on spikes. Prefers
full sun and well drained soil; lack of good drainage can cause winter kill. Tolerates
drought; rapid spreading especially in rich soil. Winter protection needed. Seed in
early spring; divide in early spring or fall. `Silver Carpet' rarely blooms; leaves
especially white.
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Lamiastrum |
9-15" |
1.5' |
Yellow |
May-Sept |
Yellow Archangel
(Deadnettle) has silver and green foliage; spreads rapidly by short underground stolons.
Square stems and opposite leaves; clusters of flowers in leaf axils. Larger plant flowers
slightly later than Lamium; more invasive and may get out of hand. If too leggy
cut back. Does well in sun to shade and moderately fertile soil. Slugs can be a problem.
Good for hanging baskets. Divide in spring; cuttings in early summer. `Herman's Pride' is upright growing with small flowers;
less aggressive.
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Lamium |
6-10" |
1' |
Pink, Purple, White |
May-Sept |
Spotted Dead Nettle has metallic silver streak down middle of leaf; mound forming
plant with hooded flowers on terminal stems. Spreads by rooting on moist soil; not as
invasive as Lamiastrum. Does well in sun to shade and moderately fertile soil.
Slugs can be a problem. Divide in spring; cuttings in early summer. `Beacon Silver' has silver white leaves with green
margins and pink flowers. `White Nancy' has similar
leaves with white flowers.
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Lily of the Valley |
6-12" |
.5-1' |
Pink, White |
May |
Convallaria majalis
has small bell-shaped flowers on a stalk above the
wide green leaves; fragrant flowers. All parts of the plant are poisonous including
the water cut flowers are places in. Likes soil rich in organic matter but spreads in poor
soil and under trees and shrubs. Does well in any type of light condition. Smaller flowers
when over crowded. Aggressive plant; can be hard to contain. Divide in the fall by
seperating the crown into single pips.
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Moneywort |
4-6" |
1' |
Yellow |
June |
Lysimachia
nummularia has smoothly rounded bright green leaves. Runners root forming a mat.
Hardy, vigorous and may become weedy. Best in part to full shade and moderately moist
conditions. Needs watering during hot dry periods. `Aurea' a yellow leafed form is
not as vigorous and requires moist soil and good sun for best color. Cuttings, division or
seed in spring.
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Ostrich Fern |
24-30" |
1-1.5' |
Insignificant |
---------- |
Matteuccia
struthiopteris
forms graceful clumps of fronds (finely divided leaves); have no
flowers. Fertile fronds will occasionally arise from the center of the clump; shorter,
more erect, darker in color and less attractive. Slow to become established; browns in hot
dry conditions. Need shelter from wind. Does well in partial to full shade and moderate to
rich soil. Can become aggressive once established. Divide in the spring.
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Pachysandra |
6-12" |
.5-1' |
White |
June |
Japanese Spurge has glossy green somewhat coarse leaves. Pinch in the spring to
promote branching. Best in part to full shade and moderately fertile soil. Will not
tolerate drought. Borderline in hardiness; needs good snow cover. Seldom spreads enough to
be a good ground cover. Divide in spring; cuttings or rooted stolons in early summer.
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Paxistima |
6-9" |
1' |
Insignificant |
------ |
Canby Paxistima has
small, leathery evergreen leaves which resemble miniature holly leaves. Prefers partial
shade and moderately fertile soil; needs a well drained site. High pH soil can cause
foliar discoloration and slow growth. Some winter loss of foliage may occur without good
snow cover. Divide in the spring or cuttings in midseason or fall.
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Phlox, Dwarf Creeping |
4-6" |
.5-1' |
Various |
May |
Phlox subulata (Moss Phlox) has mid-green, linear, rigid, evergreen
leaves which grow into a spreading mat; heavy flowering on terminal panicles. Shear back
after flowering to promote denser growth. Prefers
full sun and neutral or slightly alkaline, lean soil. Must not be kept too wet; may rot.
Water in dry summers. Weeds can be a problem. Foliage takes on a bronze color in
fall; winter browning may occur without good cover. Don't prune early in the spring; new
growth may emerge from "dead" areas. Divide after bloom or by taking basal
cuttings in mid-summer.
Ribbon Grass (see Ornamental
Grasses)
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Sedum (Stonecrop) |
|
|
|
|
| Gold Moss |
3-6" |
1' |
Yellow |
June |
| Hybrid Sedum |
3-9" |
1-1.5' |
Yellow |
June-July |
| `Rosy Glow' |
6-8" |
1-1.5' |
Red |
August-Sept |
| S. kamtschaticum |
3-6" |
1' |
Orange,Yellow |
June-July |
| S. spurium |
3-6" |
1-1.5' |
Pink,Red |
July-August |
| White Sedum |
3-6" |
1' |
White |
July |
All have fleshy leaves and unusual flowers. Various colored
foliage and flowers. Easy to grow in full sun and well drained average soil. Shear after
bloom; very attractive without flower stalks. Propagate by seed, division, cuttings and
leaves.
Sedum acre
(Gold Dust) has very fine, green fleshy leaves and small flowers. Good mat former in areas
without traffic. Spreading; can be difficult to control. Not a good competitor with weeds.
Sedum album (White Sedum) has succulent leaves
slightly coarser than Gold Moss; reddish-purple leaves in the spring and fall. Striking
when in bloom; shear after bloom.
Sedum hybridium has
1/2" wide glossy leaves; look good without flowers. Spreads with underground stems.
Best Sedum. `Rosy Glow' is larger and flowers later.
Sedum kamtschaticum
has attractive dark green scalloped foliage; variegated form has light green leaves tinged
with pink and white. Forms clumps. Doesn't spread with underground stems; not invasive.
Subsp. middendorffianum has narrow tooth
leaves and red fall color. Subsp. ellacombianum has scalloped light green leaves.
Sedum spurium has
bronze-green to red, small rounded leaves; vigorous but slightly slower spreading than
Hybrid Sedum. Spreads by underground stems. `Dragon Blood' (bronze leaves and red flowers), `Bronze Carpet' (bronze and pink) and
`Red Carpet' (red and red).
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Snow in Summer |
6-10" |
1-2' |
White |
June |
Cerastium
tomentosum has silvery gray fine textured foliage and small flowers; shear after flowering for a neater appearance
and to keep from spreading rampantly. Does well in full sun and poor soil. High fertility
can cause excessive growth; needs good drainage. Good competitor against weeds. Divide in
early spring; cuttings in early summer.
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Thyme |
|
|
|
June-July |
| Creeping |
3-6" |
.5-1' |
Lavender, Pink,
White |
|
| Lemon |
6-12" |
1' |
Lavender |
|
| Wooly |
3-6" |
.5-1' |
Pink |
|
Low growing semi-evergreen which
roots as it creeps with the ends of the branches ascending. Mint family. Slow growing with
a fine texture. To keep neat, trim in early spring before flowering. Releases a pleasant
aroma when bruised. Prefers full to part sun, moderately lean soil and fairly low moisture
levels. Good snow cover is needed to prevent winter browning. Division, cuttings and seed.
Creeping Thyme (serpyllum) also called Mother of Thyme has dark green foliage.
`Coccineus' has dark pink flowers. Lemon (citriodoros)
has lemon scented light green foliage; new growth is golden colored. Does better in more
sheltered sites. `Aureus' has golden variegated leaves. Retains golden color through most
of the season. Wooly (pseudolanuginosus) has wooly grey pubescent foliage.
| Common Name |
Height |
Space |
Flower Colors |
Flowering |
| Vinca minor |
6-9" |
1' |
Blue, White |
May |
Common Periwinkle is a
trailing evergreen ground cover which lacks hardiness and requires a snow cover. Leaves
are less glossy and lighter green in full sun. Pinch to cause branching. Branches root as
they creep. Does best in part to full shade and moderately rich soil. Don't plant in wet
poorly drained areas. Divide in spring; root or stem cuttings in early summer. `Alpina'
hardier than species. Variegated form used as a house plant or annual bedding plant.
This page was last updated March 2003
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