Masterpiece Landscaping Blog

October 28, 2010

A Few Words About Autumn Color in the Landscape Garden

The Landscape Garden is more than what most people consider to be garden.   It is an enclosure to enter, stroll though, walking the paths up to and passed plants which might appear sculpture at one look, and framing after a few paces along the path.  Envision a private woodland with windows and openings where beautiful forms or colors can be seen and beautifullly displayed.

Benches in the distance  entice  visitors to find the path to a resting place, providing for yet another scene where a sitting may resurrect cherished memories or inspire new thoughts……and smell new fragrances.

Last Sunday and Monday were the best days of color ever from my grounds.  The mists coated the yellow, maroons and greens and  oranges with a sheen  that made them glow.  The shrubs and understory trees were old enough, therefore large enough to show off their colors in mass.   The paths were overwhelmed with dottings of every color possible from the leaves primarily from mature red maples, Acer rubrum. 

Grace smokebush, Mount Airy Fothergilla, the garden’s featured  redbud, the dusty plum red cedar, bright green Wintergreen Juniper, Dwarf Blue Spruce, Dark green Taunton Yews and Tree yews, chartreuse Sunkist Arborvitae, slowly changing from summer yellow, the red barberry leaves, the blackish  leaves of an  enormous baptisia with  the seedling white and red oaks and their magnificent red and maroons, and the most fiery of them all, the leaves of Aralia spinosissimma with some purplish fruit still in tact lead the list with  the most shockingly colors of the show.

Autumn color in my grounds usually begins about October 7.   My massive white pines begin dropping their older needles and seem to cover everything for a week or so.   The mature red maples, which I have been losing one after another recently, begin the color changing normally.

I have many, many confers  and many which are dwarf or semi-dwarf…In just a few days they will begin to dominate the entire landscape with their form, size and color.

My landscape grounds almost always are as beautiful throughout winter as they are in the  best of  any other season.   Especially since I have protected it from deer feedings with fencing.

More homes would appear more beautiful if they had grounds specifically designed for a winter garden.  Minnesotans should remember that no plant beautiful in winter is ugly in summer…..but may plants which may be beautiful in summer are ugly or disappear in winter.

I must have about 100 hostas planted,  lying about somewhere.   Some varieties turned bright yellow, some showed darker patterns than their summer look, and yet, many of the older maintained the brightest, purest green, before their collapse as a garden showpiece.

Some hotlips Chelone was still in bloom as were several Goldsturm Rudbeckia which were growing in deeper shade. One of the best newer varieties on the market, Fireworks Solidago has been in bloom for three weeks…..a spectacular plant if planted in full sun. 

 On Sunday the sun tried to find room to break through the mist, but didn’t quite make it, making the various scenes show off in perfect lighting for best color display.

Many junipers change color in fall.   Hughes, Prince of Wales, Andorra, the red cedars usually, turn plumish sometimes to almost a maroon, and some red cedars to a brown.

A finished landscape garden has a plant display, cover  or grouping  generally at every level of height  to the  highest tree  grown, which could be a dwarf or semi-dwarf.   Negative spaces may be filled by a variety of mulches or varieties of low growing ground covers.

Remember the greatest expanse of negative space in most home grounds is turf.   Trees without negative space around them no longer are trees but become forests.

Increase your autumn color and winter forms by planning ahead perhaps this winter.   Walk through your grounds to evaluate its winter beauty….

Usually Minnesotans forget about how beautiful they can make winter be with the right selection of plants led by the coniferous evergreens.

October 19, 2010

Autumn Duties for the Landscape Gardener

What are the regular routines for the Landscape Gardener to maintain the home grounds in the best condition going into winter?

Watering:   There is much debate over what the autumn to late autumn watering schedule should be for the Twin City area landscaped grounds.  Some ‘professors’ profess continued regular watering until the hard frosts; others suggest withholding water gradually to assist the plants hardening off for the cold misery of winter.  Plants here usually mean woody plants.

Not all plants are equal.  Herbaceous perennials are much more ephemeral in the grounds than cold tolerant trees and shrubs.  Not all autumns are equal either.  This passing October was wet at first and then decided to move into a beautiful season of cool, sunny, colorful, gorgeous and DRY Minnesota autumn…..going waterless  on almost three weeks now….and I think it is great even though I have had to use the sprinkler since I had my irrigation system winterized early this year.

In this case I believe watering the shrubs and trees about every fourth day at twenty minutes or so a spot, during such a period would be enough.  Soil type can be a factor if you are unlucky enough to garden over soil of heavy clay.   Sandy soils are much easier to manage with watering……less intensity but more frequency than normal.   Clay soils which have not dried out during the heat of summer to brick, don’t need to be watered much in the autumn regardless of the temperatures.  Hot, dry October winds might cause some reconsiderations.

October temperatures are cool.  Heavy watering can be damaging to some conifers which become shaded with the sun ”falling’ toward the horizon here in our Northland.  Foliar disease are especially ravaging on Colorado Blue Spruce.  Others damage tree yews.   Symptoms most observed are the withering of the interior older foliage.   Yews begin to lose their yellowing needles in late Spring.  Blue spruce will show a gray to brown sickly dried up crop of old needles and be dropping them about now.    One of my white pines has a foliar disease similar to these.

Shade, moisture, and lack of air movement to dry off the foliage reliably, are the collective causes of the unsightly disfuguration to many of our conifers.

Should hostas and other perennials be pruned back in fall or spring?   I grow hostas because they offer an artistic plus to my grounds, not because I am a hosta guru.  My entire grounds is a landscape garden.   Not all hostas are equal.  Some hold attractive foliage into very late autumn and others don’t.   Some are less hardy than others.   I cut back foliage on those whose foliage no longer please me IF I have time to do this clean up. 

However, there is one note which must stand firm and deeply in the Minnesota landscape gardener’s understanding of the onslaught of winter upon cherished garden plants, woody or not…..

The greatest threat to Minnesota landscape garden plants is the autumn disaster of temperatures dropping below ten below zero or more, Fahrenheit,  before Thanksgiving, and anything around twenty below zero before Christmas WITHOUT  snow. 

Snow is nature’s best insulator for outdoor plants.  The second best is certain kinds of leaf cover…..namely the kind called oak leaves.   Others may work or may cause additional troubles to garden plants.  I let oak leaves go where they may in my autumn garden.

Oak leaves are crinkly and don’t break down rapidly even despite wet weather.  They create air pockets over whatever ground the manage to cover.   If the gardener waits till Spring to cut back dead perennial foliage, the plant will be somewhat better protected through  a snowless frigid spell when  leaves of any kind are captured by any plant  “stalks”. 

I am the only  groundskeeper of my landscape grounds.  Time available usually dictates my scheduling for manicuring the fall garden. 

Two years ago I lost four spreading yews and one twenty foot upright yew to winter kill.   The plants were in the garden for over fifteen years.   There was plenty of snow cover.  However, sometime in January over a weekend when the temperature had dropped to minus 10 degrees Fahrenheit, there was a steady thirty mile an hour wind from the North for two days.   A good friend in Waseca, Marian Fischer,  was certain her similar losses were due to that January windstorm.  

There is always the unexpected.

Major pruning of woody plants should wait until Spring, the earlier, usually the better.  The more one knows about pruning, the more one can safely disobey this recommendation, however.

Ideally, pruning  of apple, crabapple and pear trees should be done in late February or early March, to avoid the spread of  the bacterial disease called “Fireblight”.

So many special plants now growing in our more up-to-date landscaped grounds may require exceptional treatment for winter care for which we have no reliable information except for our own observations.

Those of you who live in the center Twin Cities and the immediate suburbs are now living in horticultural zone FIVE……. My ideal garden zone.  Where I live, west of Minneapolis, I can grow many zone five plants but I have be call my area, zone four and a half. 

Zone Five Japanese Beetles visited my grounds for the first time in known history this past summer.  One has to take the bad with the good if one is a devoted Landscape Gardener……And Japanese beetles are not good…..but if that is what it takes to get a little Global Warming to reach Zone five, I’ll accept it.

Many who live in the city have a serious rabbit and mouse problem…..especially in grounds surrounded by entrapping fencing.   Trap and kill, most serious landscape gardeners recommend.  Chicken wire fencing around the most susceptible plants such as Winged Euonumous or some of the Viburnums.     Some tender gardeners trap and relocate…..but that can go on for weeks and months.

I will recommend nothing here.  It is your call, dear fellow landscape gardener.