mary meyer, deb brown, mike zins. table of contents alkaline soil annuals 3 feet or more annual...
TRANSCRIPT
Mary Meyer, Deb Brown, Mike Zins
Table of ContentsAlkaline Soil Annuals 3 Feet or More Annual Vines That Grow
Quickly Boulevard Gardens:
Perennials Boulevard Gardens:
Small TreesBroadleaf Evergreens
for USDA Zone 4Clay Soil Cold Tolerant Annuals Compacted Sites: Trees Crevice Plants Deer Resistant Plants Dry Soil: Annual Foliage
Plants
Table of Contents
Dry Soil: Shade or Under Trees
Dry Soil: Trees Fragrant Annuals and
PerennialsFragrant Shrubs Indoor Low Light Knot Gardens Lakeshore Native
Plants Long-Blooming
Perennials Rain Garden Plants
Table of ContentsRiver Banks and Canoe
Public Access AreasSelf-Seeding Perennials Septic Mound Plants Shade: Shrubs Shade: Small TreesShade: Tall Perennials Steep Slopes Trees That Produce
Minimal Litter Under a Black Walnut
Tree References
Trees for Alkaline Soil: honeylocustGleditsia triacanthos
inermishoneylocust, 30-60’ thornless varieties are vest, provides filtered shade, rapid grower, tolerates many soil conditions
Buckeye, bur oak, hackberry, green ash, smokebush, and silver maple are also good trees for alkaline soils.
Small Trees for Alkaline Soils
Ironwood: Ostrya virginiana 25-40’ Interesting hoplike fruits in fall and brown leaves add winter interest, native.
Smokebush, 6-15’Chokecherry
Iowa State photo
Hydrangea: Great Shrubs for Alkaline Soil
Hydrangea arborescens hills of snow hydrangea 3-5’ tall;
Spreads 3-5’; mop-head blooms
Hydrangea paniculata panicle hydrangea 6-8’ Showy white to pinkish blooms in summer.
Endless Summer® Hydrangea macrophylla 'Bailmer'Requires acidic soil for blue
colorpH 5.0-5.8; blooms on current
season wood. pink in alkaline soil pH 6-7.
Lowering Soil pH for Blue Hydrangea Flowers Before planting:
1) Have your soil tested for initial pH level. Sending a sample to the University of Minnesota Soil Testing Laboratory soiltest.coafes.umn.edu
2) If your soil pH is less than 5.5 the only amendment suggested before planting is to mix in sphagnum peat moss into your soil at the rate of 1 to 2 cubic ft per plant. (use a blend of 50% native soil to 50% sphagnum peat)
3) If your soil pH is greater than 5.5, incorporate elemental sulfur into the top 6 to 8 inches of soil at the following rates to reduce your soil pH by 1 unit:
For sandy soils - 1.0 lb per 100 square feet (about 2 cups)For loamy soils - 2.5 lb per 100 square feet (about 5 cups)
For example, if the pH of your loamy soil is 6.0, incorporate 5 cups of elemental sulfur per 100 square feet (or ½ cup per 10 square feet). After mixing in the elemental sulfur, mix in 1 to 2 cubic feet of sphagnum peat moss per plant.
After planting:1) Periodically retest your soil pH. Do not add any acidifying amendments if your soil pH is 5.0 or less.
2) Use ammonium sulfate as the nitrogen source at the rate of 1 lb (or 2 cups) per 100 square feet (or a little less than a ¼ cup per 10 square feet). Ammonium sulfate is the best nitrogen source to help maintain soil acidity.
3) If your soil pH is greater than 5.5, use aluminum sulfate to help lower your pH and supply available aluminum at the same time. Mix about 1 lb (2 cups) of aluminum sulfate per 5 gallons of water and then apply the solution around the drip line of the plant. Repeat the application on a monthly basis as long as your soil pH is greater than 5.0. Caution - over application of aluminum sulfate can be toxic even to hydrangea.
Carl Rosen, Soil Scientist, U of Minnesota
Lowering Soil pH for Blue Hydrangea Flowers
More Shrubs for Alkaline Soil
Lilac Juniper BarberryCotoneasterLilac Viburnum
Perennials for Alkaline Soil yarrowastilbeclematissweet Williamconeflowerdaylilycoral bellsphloxhostasalvia
Boulevard Gardens: Small Trees
Syringa reticulata Japanese tree lilac 15-25’ Long-lived and cold tolerant; scented ivory flowers are an early summer hallmark; interesting winter seed pods.
Boulevard Gardens: Small Trees
Amelanchier laevis Alleghany serviceberry 15-25’ Minnesota native; large flowers; excellent red fall color; delicious edible purple fruits attract birds in summer.
Malus hybrids crabapple 15-25’ Tough and hardy in Minnesota; scab can be a conspicuous foliar disease, look for resistant varieties; many flower colors provide vivid displays; various shades of green foliage and winter interest with yellow or red fruit.
Boulevard Gardens: Small Trees
Acer tataricum ssp. ginnala amur maple 20-30’ Lightly scented May flowers are followed by double serrated dark colored leaves with lighter undersides; excellent fall color; hardy, adaptable; grown as a free-form clump, standard, or a well-groomed hedge; self-seeds.
Minnesota Tree Care Advisor photos
Perennials for clay soil
hosta and daylilies
sedum
Russian sage
coneflower
feather reedgrass, ‘Autumn Joy’ sedum
Trees for Compacted Sites
Acer rubrum red maple 50-70’ Round crown, transplants readily, ‘Northwood’ and ‘Red Sunset’ have nice fall foliage; MUST HAVE MOIST SOIL.
Trees for Compacted Sites
Betula nigra river birch 40-70’ peeling
cinnamon-brown bark, often multi-stemmed
Trees for Compacted SitesCeltis occidentalis
hackberry 40-60’ Vase-like
habit, easily transplanted, very adaptable.
May be slow to establish
Native to MN
Trees for Compacted SitesFraxinus nigra black
ash 40-70’ Large black buds, ‘Fallgold’ recommended for fall color.
Fraxinus pennsylvanica green ash 40-60’ Fast growth, deep shade, broad rounded form, seedless varieties.now overplanted? tough urban tree, emerald ash borer
Trees for Compacted SitesLarix
laricina larch, tamarack
40-70’ native, deciduous conifer,
yellow fall color, few pests
More Trees for Compacted Sites
silver maple
cottonwoodcottonwood
Deer Resistant Plants
chives and onion; Allium spp.
Deer dislike mugo pine, shown here on tortoise island at the Japanese garden,Minnesota Landscape Arboretum
ageratum
Shrubs for Shade
viburnum
barberry and boxwood
azaleas
Diervilla; bush honeysuckle
Under a Black Walnut Tree
Order from the shop.extension.umn.edu or Distribution Center: 1-800-876-8636