Pruning The Boxwood

June 23b 2013 (1)The day the evergreens get pruned at the shop is one of my favorite days in the gardening year.  Mindy from M and M  Flowers comes with a crew; they make a day of it.  The first order of business is the discussion.  Are we pruning as usual?  Is there perhaps a new shape or different direction in mind?

pruning-boxwood.jpgMaking changes to the shape of a boxwood hedge- even an established hedge- is not difficult or impossible.  It just takes time. The spheres at the corners of the parterres have not grown in evenly all around. The west side spheres get more water, as the land drains in that direction.  The east side spheres are planted in what was once asphalt, and they are shaded by the lindens.

pruned-boxwood.jpgThe spheres to the east also suffered a considerable fungal infection that has been very difficult to cure.  Simply put, the conditions for the 4 spheres are not at all equal.  One pair is much larger and more robust than the other.  So there was discussion about a moving towards a different shape at all 4 corners.

boxwood.jpgThe corner spheres could be trimmed as follows.  The bottom of the shrub could be brought into line with the existing rectangular hedge.  The top of the shrub could be pruned as a top-knot, or a smaller sphere that would appear to sit on top of the hedge.  This pruning would take a few years to accomplish, as it means pruning down to old wood.  There would be bare spots that would need to grow in.

green-velvet-boxwoodWe have some time to think this over.  Though I like to wait until the spring growth is fully flushed out before any pruning is done, pruning back to bare wood as the heat of the summer season is imminent is a recipe for burn. Boxwood grows out of winter burn fairly readily, but summer burn is an unsightly state of affairs that persists.

formally-pruned-boxwood.jpgI am not so sure that it bothers me that the spheres do not match.  Perfection is a state that does not really apply to living things.  We may just stay the course. But there is always the option to change course in a landscape.  That just takes planning, and patience.

pruning-evergreen-shrubs.jpgThis hedge has been grown from the species buxus koreana microphylla.  It is a big growing boxwood.  The hedge has been maintained at a height of 32″ and a width of 48″ for a number of years.  Grown in full sun, it readily handles the winter wind and cold weather.  The only danger posed by the winter is when we have heavy snow, the weight of which can crack the woody branches.  Those cracks make the shrub more susceptible to fungal infections.  It’s not always easy to decide whether to remove the snow, or let it be.  Disturbing branches when they are frozen can produce more damage than the snow itself.

pruning-a-boxwood-hedgeKorean boxwood does have a pronounced orangy cast in the winter, a characteristic that is not to everyone’s taste.  Our most important issue is tending a hedge that is in good proportion to the size of the building.  If that large overall size were not so important, “Green Velvet” boxwood maintains its green color all winter, and matures at 3′ by 3′.  “Green Mountain” boxwood is  virtually indistinguishable from Green Velevet, but matures at 4′ tall, and 3′ wide.  “Green Gem” is a good choice, if a more refined leaf and smaller mature size is what your garden needs.

 

pruning-the-boxwood.jpgWe lost 2 boxwood in the hedge over this past winter.  We did have one replacement available. In this spot, we went another direction.  We stitched the hedge back together, with a pair of potted boxwoods.

pruning-the-boxwood.jpgThe pruning makes a world of difference in the appearance of this garden.  I am enjoying that change thoroughly.  If you have a boxwood hedge or specimen boxwood plants that ask for a precision pruning, I highly recommend M and M Flowers.  Their work is superb.  248  340  0796.

 

A Dirty Little Secret

a dirty little secretMany years ago I had the side of the Detroit Garden Works box truck identified by the phrase “dirty little secret”.  We are a shop that specializes in ornament and fine plants for the garden.  Our shop location is in an out of the way manufacturing district.  Seventeen years later, we still routinely give out directions. As for the dirty part of the phrase-everything we have been, or hope to be, starts with the dirt.  We specialize in great containers for the garden.  Sculpture, furniture, trellises, ornament-our inventory is deep, and varied.  We like 19th century French urns.  We like fiber pots-made in America. But so basic and critical to growing a good garden involves the state of the dirt.

fountain gardenYou can shop our place for sturdy white china and equally sturdy wine glasses- great for outdoor entertaining.  Belgian candles that do not blow out on a breezy night. Framed herbaria from Italy.  Rusty steel spheres and topiary forms.  Oak and steel orangerie boxes.  Stone cisterns and garden antiques from all over the world.  But it could be that the most valuable thing we have available comes in a 40 pound bag-a custom mixed, compost based soil which can help your container gardens to thrive.  Our soil was formulated by my landscape superintendent, Steve Bernard.  The 16 years he spent in charge of all of the gardens and golf courses at Grand Hotel on Mackinac Island made him an expert on the topic of compost and soil.  I lost all of my isotoma fluvialitis over the winter.  I suspect because it is truly a zone 6 plant.  While I am mulling over what to do now, Steve made sure he prepped the soil down 12 inches with his compost.

springThough my neighborhood is noted for its poorly draining heavy clay soil, I inherited my property from two men who made it their mission to improve, and leaven the soil.  It was obvious that the men who owned my house before me understood that good soil is essential to a healthy landscape.  For a good many years after I moved, I did nothing in the garden besides topdressing the beds with a yearly 3″ thick layer of composted bark fines. The dogwoods and azaleas were in place the day I took possession-some 19 years ago.  I do just about nothing to take care of them, aside from regular water. Every spring, they bloom profusely.  Over the course of the summer, they grow.  Though azaleas reputedly ask for acid soil, I am sure my soil is on the basic side.  But I do know that the soil is friable, fast draining, and loaded with worms and other beneficial micro organisms, and the azaleas like it.  The rare occasion that I have to dig, the soil is loose, friable, and dark.  An garden empire can be built upon good soil.

scilla Plants will colonize where the soil favors robust growth.  My small perennial garden at home has rich soil further down than a shovel will reach.  It would not make grapes, nasturtiums or cosmos happy-it is too rich and water retentive.  It would not make bog plants happy either.  But it does provide a happy home for all the plants I have chosen to grow there.

annual plantingThe soil we put in containers is topsoil mixed with sand and compost.  I do not recommend soilless mixes for containers.  While they are lightweight, and a giant bag is easy to carry to the car, the peat base gets rock hard when it dries out.  It has no nutrient value per se.  Plants in soilless mixes have to be fertilized regularly.  I favor a good quality compost enriched real soil for my containers.  Soil retains moisture longer.  Real soil has micro nutrients and organisms that are beneficial to plants.  Good soil is a complex living environment that promotes healthy growth.

soilContainer plantings perform better in good soil with high fertility.  I change the soil out in my containers every year.  The old soil goes to one of our several compost piles-for revitalization.  All of our soil gets recycled, but we do not reuse until it has had a year or two to lie fallow, and be mixed in with new compost.

garden in springWhenever I see a garden in my area where that plants are a rich shade of green, and the growth generous, I know there is good soil for growing.  In perennial beds, the soil cannot be changed out every year.  So a topdressing of compost, or ground bark fines adds back to the soil what the plants have used.

Boston ivyThe walls of the neighboring building at the shop is completely covered with Boston ivy.  7 individual plants now cover 3000 square feet of wall space.  Did we prep that soil before we planted-oh yes.  A few shovels full of compost in the fall, and liberal watering is all we do to keep the plants happy and healthy.

 

Spring Pruning

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The day you put a plant in the ground is the first day of a relationship.  If you plant cosmos, that relationship constitutes one season.  If you plant a tree, that relationship might survive for generations.  If you plant shrubs, you could have a good many years of pleasure ahead of you-provided you prune.  Woody shrubs, left to their own devices, go to rack and ruin.   They spend no end of effort piling on enough wood to send the tips of their branches to the sky.  What is the big attraction of the sky?  No competition for light, air, and rain. No shrub feels any inclination to bloom where you want to see blooms-at eye level, that is.  Plants grow with survival in mind.  Should you have another idea in mind, wade in.  Participate.

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Shrubs will grow sideways, around an obstacle.  They will sprout back, if cut to the ground.  They will survive the indignity of a homeowner with a hedge trimmer gone amok.  They will survive, even though the overall shape may be ungainly, or sheared to within an inch of its life.  The instinct to live is strong.  Lucky for me, and every other gardener who has learned on the job.  Pruning a hydrangea is not hard-it just requires the patience to consider every branch, before you cut.  I prune each branch, one at a time.

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A well pruned hydrangea looks like it has had a shag haircut. Every branch has its our airspace. This means some branches get last year’s flowers cut off-only. Other branches get 8″ removed. Others get 16″ removed. Some old and thick branches in the middle get cut even harder, so air and light can reach down in to as many branches as possible.  Some gardeners prune their Limelight hydrangeas to within 14″ to 24″ of the ground, forcing them to produce basal shoots which originate underground. This method tends to produce a shorter shrub, with fewer and larger flowers.  I dislike cutting this hard-it takes so long for the shrub to regain a natural and airy shape.  I would rather have lots of flowers, than a few gigantic flowers.  I would rather plant the shorter growing version of Limelight- “Little Lime” – than prune a Limelight too hard.

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I like my Limelight hydrangeas tall, and I like lots of flowers. My yews are 48″ tall at this end of the garden, and the arborvitae are 14′ tall.  The hydrangeas grown 6′ to 8′ tall-perfect for this spot. For good flowering from top to bottom, the lower branches need to be left long, and the top branches need to be shorter. The finished shape should be very loosely pyramidal, or like an egg on its side.  Step back frequently, to see how things are shaping up.  This hydrangea blooms on new wood, so no matter how you prune, you will get flowers.  Shearing a branch will encourage that branch to produce multiple shoots below the cut.  Thicken up, and out.  As long as the exterior shape is loosely described, the shrub will prosper.  Shearing deciduous flowering shrubs may take less time, but produces less than desirable results.  Renovating shrubs that have been sheared takes a long time.  One cut at a time-this is my advice.  Invest in a great pair of pruners-this makes the work easier.  The moment that all I can hear is the birds, and the action of the pruner blades bypassing each other, is a spring gardening moment I treasure.

pruning-roses.jpgI do grow a few shrub roses.  Sally Holmes, Carefree Beauty and Earthsong.  I have read lots of articles about pruning roses, none of which I have paid much mind to.  I stop dead heading my roses in mid-August.  I actually love the rose hips in the fall and winter.  In the spring, when the buds swell, I prune. The swelling of the buds?  You will recognize swelling buds when you see them.  My roses bloom on the new shoots.  I never cut a branch back by more than 1/3rd.  I prune the entire collection of roses as if they were a single plant.  I leave them loose. Last fall I secured the summer’s growth of the climbing roses to the wall-not much needs to be done to them now.

rose-hips.jpgOccasionally I will hard prune an old climbing rose cane low to the ground.  This keeps new growth coming from the bottom. Pruning stimulates growth.  Pruning a climbing rose cane 6 feet off the ground will result in a rash of shoots.  A long stalk with a tuft of shoots on the top-not the best look. Any cane which you can train to grow horizontally will flower more heavily.  If you think about the where the sun and rain comes from, this makes sense.  Is the afore mentioned a guide to pruning roses-not really.  Every gardener has to deal with their roses one to one.  Look at them, and decide how to prune. I prune my roses so they have the best possible overall shape.  Most roses are very ungainly growers, so pruning for a good shape is not always so easy.  That’s why I grow asparagus with my roses.  The  ferny fronds conceal those awkward and ungainly branches.  Do I prune my asparagus over the summer-oh yes.  I keep them at a height which conceals those legs.  Does this affect my asparagus crop?  Maybe.  But everything in the garden is about choices.  I want great roses more than I want home grown asparagus.

beech-ferns.jpgI do not cut back my beech ferns in the fall.  The dead fronds mulch and protect the European ginger over the winter.  By April 1st, those fronds have cut loose from the crown.  I do not need to prune.  I rake them off.  A rubber rake does a great job.  My fingers do the best job.

european-ginger.jpgThe European ginger has already been busy, sending out new shoots.  A steel rake, or a size 8 boot can damage these tender new shoots.  One of the pleasures of the spring-the new growth.  Friable soil.  My housekeeping inside-rather rude and abrupt.  I just want to get the job done.  When I am cleaning the garden in the spring, I take my time.  I do it-gently.  I have a relationship with this garden that I intend to nurture.

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Lifting a lower branch of a spruce, I see icy snow. The transition from winter to spring has been incredibly slow this year. Really shady spots in my garden are still frozen. The night temperatures are still below freezing.  Frozen ground, frozen branches-my advice is to let them be.

April 2 2013 (40)The hellebores are awake.  Last years foliage has collapsed in a heap on the ground.  Every day I think about cutting that old foliage away.  Clean and bare is not always the best situation.  The newly emerging flowers benefit from all that fluff. The transition from winter to spring can be a rocky journey.   Sometimes, the best thing to do is to do nothing.

hellebore-flowers.jpgLast year’s foliage protects those flowering stalks, ready to emerge.  A warm spell in March proved to be damaging.  The buds sensed it was time to grow.  Nature had a different idea in mind.  We have had a run of really cold weather, the past 3 weeks.  Some of the exposed buds on this plant are black with the rot produced by freezing temperatures.

uncovered-hellebore.jpgCutting away last years foliage  exposes new flower buds.  Very tender flower buds.  Just to look at them, you would know they are not armed against the cold.  I cut the dead leaves away, and put them back over the top of these buds.  It is too soon to clean here.  What constitutes better days?  Warmer nights.  The ground is still very cold.  It will be 2 months before the soil really warms up in my zone. Hellebores do not require warm soil, but the flowers will be damaged by night air temperatures in the mid to low 20’s.  They need all that litter on the ground over them.  It’s not time yet to wash and put away the blanket.

hellebore-seedlings.jpgI am shocked and pleased to see that I have hellebore seedlings sprouting.  I spent a few moments taking this in, before I covered them up.  I am not sure how long it will be, before I expose them to the light of the new season.  The pruning and the cleaning-all in good time.  A slow spring-this is what we have now.

Pruning Trees

March 30a 2013 (2) There are plenty of reasons to prune.  The branch of a tree, shrub, or rose may be dead, and need removal.  It may be growing across the sidewalk, and need some heading back.  An old lilac may be blooming only at the top, 15 feet above ground, and need rejuvenation.  Branches of shrubs that cross over each other, and rub off the bark is an invitation to disease or insect damage.  Intact bark protects the life inside.  Pruning can help keep woody plants vigorous, healthy, and beautiful.

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Plants maintained as hedges require regular pruning. The lindens at the shop form a hedge the body of which is above ground.  The branches at ground level have been removed over the years so people may walk underneath them.  Regular pruning of the trees promotes a good framework of branches that represent the desired shape.  These lindens were overdue.  Though I am a serviceable pruner of shrubs and roses, this job asks for an expert.  Someone who knows how to safely navigate high above the ground, and someone who understands the consequences of each cut, deliberately pruning in anticipation of a desired result.
pruning-the-lindens.jpgTrees that are trained as an overhead hedge are pruned with the idea of encouraging lateral growth.  Anyone who has ever topped a shrub knows that the plant responds to a single cut with multiple sprouting shoots.  This results in a dense pattern of twigs on top, which blocks the light to the interior.  Every branch of a plant needs light.  Shrubs that are repeatedly cut back so every branch is the same length eventually decline on the interior, and will need more drastic pruning to restore them to health from the inside out.

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Pruning trees in late winter means there will only be a short time before growth resumes, and the healing of the cuts can begin. Another reason to prune now is that the cuts will stimulate growth at a time of year when new growth is expected.  Trees actually stop growing and begin to go dormant in late summer.  This is part of the process by which they are eventually able to  go totally dormant, and endure the winter without injury.  I do not like to prune seriously at the end of the summer or in the fall-the plants should be going to sleep.  Not shocked into growth.  Pruning these trees the end of March will encourage dormant buds to flush out.

on-the-roof.jpgThe roof next to the trees turned out to be handy.  This perch, and a long and very sharp pole pruner, enabled Jack Richardson, owner of Guardian Tree Experts, to trim the inside flat sides of the lindens.

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When the trees leaf out, those leaves will make a giant rectangle above ground.  They will represent this better next year than they will this year. Pruning that waits too long means more time will be needed for the trees to grow in how you envision.  The trees were originally planted far enough away from the building so the shape would be easy to see.  This also permits light to wash that dark wall.  The relationship of the sun to the shade is a feature of this space in the summer.

pruning-trees.jpgThe big cuts make it easy to understand the concept of lateral growth.  The thick branches are pruned back to a smaller branch which is already growing in the proper plane.  The smaller branch will benefit from the growth energy in the tree directed its way.  Dormant buds at this point will emerge, and grow into the space around the larger branch.

hedging-the-lindens.jpgThe overall vertical plane has been reestablished.  In a year, a decision can be made about whether to prune again, or wait until the following year.  That said, frequent and less drastic pruning makes for a quicker recovery time.  Regular pruning from the beginning helps to create a strong and healthy structure.

dying-tree.jpgThe ultimate pruning means taking a tree down to the ground.  This maple, suffering from girdling roots and severe injury from lightning has become a hazard.  The large left lateral branch is at such a near horizontal angle that the branch has begun to split.  The original wound never really healed, and now the tree has begun to rot.  No one could foresee the exact moment that this big tree will give way, but all of the signs are there.  This tree needs to come down.

taking-down-a-maple.jpgNorway maples are especially prone to girdling roots.  A root that encircles a tree trunk can eventually grow enough to strangle the tree.  At a certain point, the pruning of the offending root is too late to make a difference.  Every one of the maples on my property had significant girdling roots when I moved there.  Knowing that this tree would eventually die, I planted other trees around it.  The loss of a large tree can be devastating to the community planted underneath it.  This maple had been in serious decline for many years.  Very little remained of its crown.

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There are 5 trees that were planted fairly close to the maple-2 magnolias, and 3 parrotias. Those trees had been in ground and growing long enough for their upper branches to reach the height of the lower branches of the maple. The time was right to take the maple down. The 5 remaining trees will prosper from the light, space, and less competition for water. They should grow very fast now; their filtered shade will be just what the garden underneath them will need.  Guardian Tree Experts in Ann Arbor-they do first rate work.  The trees are ready for a little spring weather.